Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W3100157999', 'doi': 'https://doi.org/10.1051/0004-6361/201220989', 'title': 'Carbon-enhanced metal-poor stars: the most pristine objects?', 'display_name': 'Carbon-enhanced metal-poor stars: the most pristine objects?', 'publication_year': 2013, 'publication_date': '2013-03-07', 'ids': {'openalex': 'https://openalex.org/W3100157999', 'doi': 'https://doi.org/10.1051/0004-6361/201220989', 'mag': '3100157999'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1051/0004-6361/201220989', 'pdf_url': 'https://www.aanda.org/articles/aa/pdf/2013/04/aa20989-12.pdf', 'source': {'id': 'https://openalex.org/S205231332', 'display_name': 'Astronomy and Astrophysics', 'issn_l': '0004-6361', 'issn': ['0004-6361', '1432-0746'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319748', 'host_organization_name': 'EDP Sciences', 'host_organization_lineage': ['https://openalex.org/P4310319748'], 'host_organization_lineage_names': ['EDP Sciences'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['arxiv', 'crossref', 'datacite'], 'open_access': {'is_oa': True, 'oa_status': 'bronze', 'oa_url': 'https://www.aanda.org/articles/aa/pdf/2013/04/aa20989-12.pdf', 'any_repository_has_fulltext': True}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5026091792', 'display_name': 'M. Spite', 'orcid': 'https://orcid.org/0000-0002-2795-3421'}, 'institutions': [{'id': 'https://openalex.org/I4210103454', 'display_name': 'Galaxies, Etoiles, Physique et Instrumentation', 'ror': 'https://ror.org/01920cw75', 'country_code': 'FR', 'type': 'facility', 'lineage': ['https://openalex.org/I1294671590', 'https://openalex.org/I2800004676', 'https://openalex.org/I4210103454', 'https://openalex.org/I4210148025']}], 'countries': ['FR'], 'is_corresponding': False, 'raw_author_name': 'M. Spite', 'raw_affiliation_strings': ['GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)'], 'affiliations': [{'raw_affiliation_string': 'GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'institution_ids': ['https://openalex.org/I4210103454']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5019412000', 'display_name': 'E. Caffau', 'orcid': 'https://orcid.org/0000-0001-6011-6134'}, 'institutions': [{'id': 'https://openalex.org/I4210103454', 'display_name': 'Galaxies, Etoiles, Physique et Instrumentation', 'ror': 'https://ror.org/01920cw75', 'country_code': 'FR', 'type': 'facility', 'lineage': ['https://openalex.org/I1294671590', 'https://openalex.org/I2800004676', 'https://openalex.org/I4210103454', 'https://openalex.org/I4210148025']}, {'id': 'https://openalex.org/I223822909', 'display_name': 'Heidelberg University', 'ror': 'https://ror.org/038t36y30', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I223822909']}], 'countries': ['DE', 'FR'], 'is_corresponding': False, 'raw_author_name': 'E. Caffau', 'raw_affiliation_strings': ['GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'ZAH - Zentrum für Astronomie der Universität Heidelberg (Albert-Ueberle-Str. 2, D-69120 Heidelberg - Germany)'], 'affiliations': [{'raw_affiliation_string': 'GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'institution_ids': ['https://openalex.org/I4210103454']}, {'raw_affiliation_string': 'ZAH - Zentrum für Astronomie der Universität Heidelberg (Albert-Ueberle-Str. 2, D-69120 Heidelberg - Germany)', 'institution_ids': ['https://openalex.org/I223822909']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5051848532', 'display_name': 'P. Bonifacio', 'orcid': 'https://orcid.org/0000-0002-1014-0635'}, 'institutions': [{'id': 'https://openalex.org/I4210103454', 'display_name': 'Galaxies, Etoiles, Physique et Instrumentation', 'ror': 'https://ror.org/01920cw75', 'country_code': 'FR', 'type': 'facility', 'lineage': ['https://openalex.org/I1294671590', 'https://openalex.org/I2800004676', 'https://openalex.org/I4210103454', 'https://openalex.org/I4210148025']}], 'countries': ['FR'], 'is_corresponding': False, 'raw_author_name': 'P. Bonifacio', 'raw_affiliation_strings': ['GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)'], 'affiliations': [{'raw_affiliation_string': 'GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'institution_ids': ['https://openalex.org/I4210103454']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5011711480', 'display_name': 'F. Spite', 'orcid': 'https://orcid.org/0000-0002-9675-1364'}, 'institutions': [{'id': 'https://openalex.org/I4210103454', 'display_name': 'Galaxies, Etoiles, Physique et Instrumentation', 'ror': 'https://ror.org/01920cw75', 'country_code': 'FR', 'type': 'facility', 'lineage': ['https://openalex.org/I1294671590', 'https://openalex.org/I2800004676', 'https://openalex.org/I4210103454', 'https://openalex.org/I4210148025']}], 'countries': ['FR'], 'is_corresponding': False, 'raw_author_name': 'F. Spite', 'raw_affiliation_strings': ['GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)'], 'affiliations': [{'raw_affiliation_string': 'GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'institution_ids': ['https://openalex.org/I4210103454']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5052401672', 'display_name': 'H.‐G. Ludwig', 'orcid': 'https://orcid.org/0000-0001-9333-4410'}, 'institutions': [{'id': 'https://openalex.org/I223822909', 'display_name': 'Heidelberg University', 'ror': 'https://ror.org/038t36y30', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I223822909']}, {'id': 'https://openalex.org/I4210103454', 'display_name': 'Galaxies, Etoiles, Physique et Instrumentation', 'ror': 'https://ror.org/01920cw75', 'country_code': 'FR', 'type': 'facility', 'lineage': ['https://openalex.org/I1294671590', 'https://openalex.org/I2800004676', 'https://openalex.org/I4210103454', 'https://openalex.org/I4210148025']}], 'countries': ['DE', 'FR'], 'is_corresponding': False, 'raw_author_name': 'H.-G. Ludwig', 'raw_affiliation_strings': ['GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'ZAH - Zentrum für Astronomie der Universität Heidelberg (Albert-Ueberle-Str. 2, D-69120 Heidelberg - Germany)'], 'affiliations': [{'raw_affiliation_string': 'ZAH - Zentrum für Astronomie der Universität Heidelberg (Albert-Ueberle-Str. 2, D-69120 Heidelberg - Germany)', 'institution_ids': ['https://openalex.org/I223822909']}, {'raw_affiliation_string': 'GEPI - Galaxies, Etoiles, Physique, Instrumentation (5, place Jules Janssen 92195 MEUDON CEDEX - France)', 'institution_ids': ['https://openalex.org/I4210103454']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5066363499', 'display_name': 'B. Plez', 'orcid': 'https://orcid.org/0000-0002-0398-4434'}, 'institutions': [], 'countries': ['FR'], 'is_corresponding': False, 'raw_author_name': 'B. Plez', 'raw_affiliation_strings': ['Astrophysique Stellaire (France)'], 'affiliations': [{'raw_affiliation_string': 'Astrophysique Stellaire (France)', 'institution_ids': []}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5022809407', 'display_name': 'N. Christlieb', 'orcid': 'https://orcid.org/0000-0002-4043-2727'}, 'institutions': [{'id': 'https://openalex.org/I223822909', 'display_name': 'Heidelberg University', 'ror': 'https://ror.org/038t36y30', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I223822909']}], 'countries': ['DE'], 'is_corresponding': False, 'raw_author_name': 'N. Christlieb', 'raw_affiliation_strings': ['ZAH - Zentrum für Astronomie der Universität Heidelberg (Albert-Ueberle-Str. 2, D-69120 Heidelberg - Germany)'], 'affiliations': [{'raw_affiliation_string': 'ZAH - Zentrum für Astronomie der Universität Heidelberg (Albert-Ueberle-Str. 2, D-69120 Heidelberg - Germany)', 'institution_ids': ['https://openalex.org/I223822909']}]}], 'institution_assertions': [], 'countries_distinct_count': 2, 'institutions_distinct_count': 2, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 6.958, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 52, 'citation_normalized_percentile': {'value': 0.99995, 'is_in_top_1_percent': True, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 95, 'max': 96}, 'biblio': {'volume': '552', 'issue': None, 'first_page': 'A107', 'last_page': 'A107'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10039', 'display_name': 'Stellar Astrophysics and Exoplanet Studies', 'score': 0.9999, 'subfield': {'id': 'https://openalex.org/subfields/3103', 'display_name': 'Astronomy and Astrophysics'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10039', 'display_name': 'Stellar Astrophysics and Exoplanet Studies', 'score': 0.9999, 'subfield': {'id': 'https://openalex.org/subfields/3103', 'display_name': 'Astronomy and Astrophysics'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T10477', 'display_name': 'Star Formation in Molecular Clouds and Protoplanetary Disks', 'score': 0.9996, 'subfield': {'id': 'https://openalex.org/subfields/3103', 'display_name': 'Astronomy and Astrophysics'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T12917', 'display_name': 'Astronomical Instrumentation and Spectroscopy', 'score': 0.9977, 'subfield': {'id': 'https://openalex.org/subfields/3105', 'display_name': 'Instrumentation'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/carbon-fibers', 'display_name': 'Carbon fibers', 'score': 0.66187465}, {'id': 'https://openalex.org/keywords/young-stellar-objects', 'display_name': 'Young Stellar Objects', 'score': 0.457315}, {'id': 'https://openalex.org/keywords/carbon-star', 'display_name': 'Carbon star', 'score': 0.41409042}], 'concepts': [{'id': 'https://openalex.org/C150846664', 'wikidata': 'https://www.wikidata.org/wiki/Q7602306', 'display_name': 'Stars', 'level': 2, 'score': 0.916832}, {'id': 'https://openalex.org/C99465377', 'wikidata': 'https://www.wikidata.org/wiki/Q217030', 'display_name': 'Metallicity', 'level': 3, 'score': 0.8999735}, {'id': 'https://openalex.org/C44870925', 'wikidata': 'https://www.wikidata.org/wiki/Q37547', 'display_name': 'Astrophysics', 'level': 1, 'score': 0.714921}, {'id': 'https://openalex.org/C77077793', 'wikidata': 'https://www.wikidata.org/wiki/Q336019', 'display_name': 'Abundance (ecology)', 'level': 2, 'score': 0.6630835}, {'id': 'https://openalex.org/C140205800', 'wikidata': 'https://www.wikidata.org/wiki/Q5860', 'display_name': 'Carbon fibers', 'level': 3, 'score': 0.66187465}, {'id': 'https://openalex.org/C2780030769', 'wikidata': 'https://www.wikidata.org/wiki/Q4968575', 'display_name': 'Plateau (mathematics)', 'level': 2, 'score': 0.6576947}, {'id': 'https://openalex.org/C121332964', 'wikidata': 'https://www.wikidata.org/wiki/Q413', 'display_name': 'Physics', 'level': 0, 'score': 0.62377286}, {'id': 'https://openalex.org/C544153396', 'wikidata': 'https://www.wikidata.org/wiki/Q11426', 'display_name': 'Metal', 'level': 2, 'score': 0.5567769}, {'id': 'https://openalex.org/C47371412', 'wikidata': 'https://www.wikidata.org/wiki/Q130019', 'display_name': 'Carbon star', 'level': 3, 'score': 0.41409042}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, 'score': 0.23820117}, {'id': 'https://openalex.org/C192562407', 'wikidata': 'https://www.wikidata.org/wiki/Q228736', 'display_name': 'Materials science', 'level': 0, 'score': 0.17752716}, {'id': 'https://openalex.org/C178790620', 'wikidata': 'https://www.wikidata.org/wiki/Q11351', 'display_name': 'Organic chemistry', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C505870484', 'wikidata': 'https://www.wikidata.org/wiki/Q180538', 'display_name': 'Fishery', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C104779481', 'wikidata': 'https://www.wikidata.org/wiki/Q50707', 'display_name': 'Composite number', 'level': 2, 'score': 0.0}, {'id': 'https://openalex.org/C159985019', 'wikidata': 'https://www.wikidata.org/wiki/Q181790', 'display_name': 'Composite material', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.0}, {'id': 'https://openalex.org/C134306372', 'wikidata': 'https://www.wikidata.org/wiki/Q7754', 'display_name': 'Mathematical analysis', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C33923547', 'wikidata': 'https://www.wikidata.org/wiki/Q395', 'display_name': 'Mathematics', 'level': 0, 'score': 0.0}], 'mesh': [], 'locations_count': 8, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.1051/0004-6361/201220989', 'pdf_url': 'https://www.aanda.org/articles/aa/pdf/2013/04/aa20989-12.pdf', 'source': {'id': 'https://openalex.org/S205231332', 'display_name': 'Astronomy and Astrophysics', 'issn_l': '0004-6361', 'issn': ['0004-6361', '1432-0746'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319748', 'host_organization_name': 'EDP Sciences', 'host_organization_lineage': ['https://openalex.org/P4310319748'], 'host_organization_lineage_names': ['EDP Sciences'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://hal.archives-ouvertes.fr/hal-00798041', 'pdf_url': 'https://hal.science/hal-00798041/document', 'source': {'id': 'https://openalex.org/S4306402512', 'display_name': 'HAL (Le Centre pour la Communication Scientifique Directe)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1294671590', 'host_organization_name': 'Centre National de la Recherche Scientifique', 'host_organization_lineage': ['https://openalex.org/I1294671590'], 'host_organization_lineage_names': ['Centre National de la Recherche Scientifique'], 'type': 'repository'}, 'license': 'other-oa', 'license_id': 'https://openalex.org/licenses/other-oa', 'version': 'submittedVersion', 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://arxiv.org/abs/1303.1791', 'pdf_url': 'https://arxiv.org/pdf/1303.1791', 'source': {'id': 'https://openalex.org/S4306400194', 'display_name': 'arXiv (Cornell University)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I205783295', 'host_organization_name': 'Cornell University', 'host_organization_lineage': ['https://openalex.org/I205783295'], 'host_organization_lineage_names': ['Cornell University'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'submittedVersion', 'is_accepted': False, 'is_published': False}, {'is_oa': False, 'landing_page_url': 'https://hal.science/hal-00798041', 'pdf_url': None, 'source': None, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://hal.archives-ouvertes.fr/hal-00798041/file/SpiteAA2012-20989.pdf', 'pdf_url': 'https://hal.archives-ouvertes.fr/hal-00798041/file/SpiteAA2012-20989.pdf', 'source': {'id': 'https://openalex.org/S4306402512', 'display_name': 'HAL (Le Centre pour la Communication Scientifique Directe)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1294671590', 'host_organization_name': 'Centre National de la Recherche Scientifique', 'host_organization_lineage': ['https://openalex.org/I1294671590'], 'host_organization_lineage_names': ['Centre National de la Recherche Scientifique'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'submittedVersion', 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://hal.science/hal-00798041/file/SpiteAA2012-20989.pdf', 'pdf_url': 'https://hal.science/hal-00798041/file/SpiteAA2012-20989.pdf', 'source': {'id': 'https://openalex.org/S4306402512', 'display_name': 'HAL (Le Centre pour la Communication Scientifique Directe)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1294671590', 'host_organization_name': 'Centre National de la Recherche Scientifique', 'host_organization_lineage': ['https://openalex.org/I1294671590'], 'host_organization_lineage_names': ['Centre National de la Recherche Scientifique'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'submittedVersion', 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://hal.archives-ouvertes.fr/hal-00798041/document', 'pdf_url': 'https://hal.archives-ouvertes.fr/hal-00798041/document', 'source': {'id': 'https://openalex.org/S4306402512', 'display_name': 'HAL (Le Centre pour la Communication Scientifique Directe)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1294671590', 'host_organization_name': 'Centre National de la Recherche Scientifique', 'host_organization_lineage': ['https://openalex.org/I1294671590'], 'host_organization_lineage_names': ['Centre National de la Recherche Scientifique'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'submittedVersion', 'is_accepted': False, 'is_published': False}, {'is_oa': False, 'landing_page_url': 'https://api.datacite.org/dois/10.48550/arxiv.1303.1791', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4393179698', 'display_name': 'DataCite API', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I4210145204', 'host_organization_name': 'DataCite', 'host_organization_lineage': ['https://openalex.org/I4210145204'], 'host_organization_lineage_names': ['DataCite'], 'type': 'metadata'}, 'license': None, 'license_id': None, 'version': None}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1051/0004-6361/201220989', 'pdf_url': 'https://www.aanda.org/articles/aa/pdf/2013/04/aa20989-12.pdf', 'source': {'id': 'https://openalex.org/S205231332', 'display_name': 'Astronomy and Astrophysics', 'issn_l': '0004-6361', 'issn': ['0004-6361', '1432-0746'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319748', 'host_organization_name': 'EDP Sciences', 'host_organization_lineage': ['https://openalex.org/P4310319748'], 'host_organization_lineage_names': ['EDP Sciences'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': ['https://openalex.org/W2147399252', 'https://openalex.org/W3100157999'], 'referenced_works_count': 99, 'referenced_works': ['https://openalex.org/W149466918', 'https://openalex.org/W1581050742', 'https://openalex.org/W1610285090', 'https://openalex.org/W1641048508', 'https://openalex.org/W1966404383', 'https://openalex.org/W1972577223', 'https://openalex.org/W1975941978', 'https://openalex.org/W1977000586', 'https://openalex.org/W1983295796', 'https://openalex.org/W1987879084', 'https://openalex.org/W1989818456', 'https://openalex.org/W1990577178', 'https://openalex.org/W2006580942', 'https://openalex.org/W2009042620', 'https://openalex.org/W2012997244', 'https://openalex.org/W2013357310', 'https://openalex.org/W2029799079', 'https://openalex.org/W2031562819', 'https://openalex.org/W2032550851', 'https://openalex.org/W2042509091', 'https://openalex.org/W2044643318', 'https://openalex.org/W2050824483', 'https://openalex.org/W2064752148', 'https://openalex.org/W2068531270', 'https://openalex.org/W2078478473', 'https://openalex.org/W2081978079', 'https://openalex.org/W2085944127', 'https://openalex.org/W2087818953', 'https://openalex.org/W2093159502', 'https://openalex.org/W2094572710', 'https://openalex.org/W2097122825', 'https://openalex.org/W2100040774', 'https://openalex.org/W2100183643', 'https://openalex.org/W2102416654', 'https://openalex.org/W2103024508', 'https://openalex.org/W2104311895', 'https://openalex.org/W2104652024', 'https://openalex.org/W2104878678', 'https://openalex.org/W2108059869', 'https://openalex.org/W2110679917', 'https://openalex.org/W2111817932', 'https://openalex.org/W2115358257', 'https://openalex.org/W2118416230', 'https://openalex.org/W2118597986', 'https://openalex.org/W2123829915', 'https://openalex.org/W2124199755', 'https://openalex.org/W2127519985', 'https://openalex.org/W2131091309', 'https://openalex.org/W2131189538', 'https://openalex.org/W2132358681', 'https://openalex.org/W2138613133', 'https://openalex.org/W2143888346', 'https://openalex.org/W2146825330', 'https://openalex.org/W2152671803', 'https://openalex.org/W2153220281', 'https://openalex.org/W2155156277', 'https://openalex.org/W2157068965', 'https://openalex.org/W2157917411', 'https://openalex.org/W2160591245', 'https://openalex.org/W2161669694', 'https://openalex.org/W2164719957', 'https://openalex.org/W2165265566', 'https://openalex.org/W2166771986', 'https://openalex.org/W2263412961', 'https://openalex.org/W2269825909', 'https://openalex.org/W2488494904', 'https://openalex.org/W2500713936', 'https://openalex.org/W2937291770', 'https://openalex.org/W2950005664', 'https://openalex.org/W3014573034', 'https://openalex.org/W3098227048', 'https://openalex.org/W3098301242', 'https://openalex.org/W3098439921', 'https://openalex.org/W3098918376', 'https://openalex.org/W3099824350', 'https://openalex.org/W3099844113', 'https://openalex.org/W3100037251', 'https://openalex.org/W3100102197', 'https://openalex.org/W3100133426', 'https://openalex.org/W3100314876', 'https://openalex.org/W3100508456', 'https://openalex.org/W3100799550', 'https://openalex.org/W3102002503', 'https://openalex.org/W3102013617', 'https://openalex.org/W3102244089', 'https://openalex.org/W3102414849', 'https://openalex.org/W3102449405', 'https://openalex.org/W3103886277', 'https://openalex.org/W3104310782', 'https://openalex.org/W3104860163', 'https://openalex.org/W3105243848', 'https://openalex.org/W3105728928', 'https://openalex.org/W3105817072', 'https://openalex.org/W3156520931', 'https://openalex.org/W4211107316', 'https://openalex.org/W4290982395', 'https://openalex.org/W4292399985', 'https://openalex.org/W4293012776', 'https://openalex.org/W4297432658'], 'related_works': ['https://openalex.org/W4300796585', 'https://openalex.org/W4214744688', 'https://openalex.org/W3177790191', 'https://openalex.org/W3105903673', 'https://openalex.org/W3100157999', 'https://openalex.org/W2887083098', 'https://openalex.org/W2479441067', 'https://openalex.org/W1839968002', 'https://openalex.org/W1644689148', 'https://openalex.org/W1528545904'], 'abstract_inverted_index': {'Carbon-enhanced': [0], 'metal': [1], 'poor': [2], 'stars': [3, 24, 45, 142, 166, 194, 212], '(CEMP)': [4], 'form': [5], 'a': [6, 116, 154, 176, 186], 'significant': [7], 'proportion': [8], 'of': [9, 102, 134, 153, 185, 189, 209], 'the': [10, 28, 33, 40, 48, 83, 91, 103, 127, 135, 151, 207, 210], 'metal-poor': [11, 21, 165], 'stars,': [12], 'their': [13], 'origin': [14], 'is': [15, 61], 'not': [16, 52], 'well': [17], 'understood.': [18], 'Three': [19], 'very': [20, 112, 190, 214], 'C-rich': [22], 'turnoff': [23, 44], 'were': [25, 80, 97], 'selected': [26], 'from': [27], 'SDSS': [29], 'survey,': [30], 'observed': [31], 'with': [32, 57, 70, 118], 'ESO': [34], 'VLT': [35], '(UVES)': [36], 'to': [37, 64, 82, 110, 139, 197], 'precisely': [38], 'determine': [39], 'element': [41], 'abundances.': [42, 86], 'In': [43], '(unlike': [46], 'giants)': [47], 'carbon': [49, 148, 173], 'abundance': [50], 'has': [51], 'been': [53], 'affected': [54], 'by': [55], 'mixing': [56], 'deep': [58], 'layers': [59], 'and': [60, 93, 107, 205], 'therefore': [62], 'easier': [63], 'interpret.': [65], 'The': [66, 87, 129, 147, 163], 'analysis': [67], 'was': [68], 'performed': [69], '1D': [71, 122], 'LTE': [72, 85], 'static': [73], 'model': [74], 'atmospheres.': [75], 'When': [76], 'available,': [77], 'non-LTE': [78], 'corrections': [79], 'applied': [81], 'classical': [84], '3D': [88], 'effects': [89], 'on': [90], 'CH': [92], 'CN': [94], 'molecular': [95], 'bands': [96], 'computed': [98], 'using': [99], 'hydrodynamical': [100], 'simulations': [101], 'stellar': [104], 'atmosphere': [105], '(CO5BOLD)': [106], 'are': [108, 124, 195], 'found': [109], 'be': [111], 'important.': [113], 'To': [114], 'facilitate': [115], 'comparison': [117], 'previous': [119], 'results,': [120], 'only': [121], 'abundances': [123, 130, 149], 'used': [125], 'in': [126, 143], 'discussion.': [128], '(or': [131, 199], 'upper': [132], 'limits)': [133], 'elements': [136], 'enable': [137], 'us': [138], 'place': [140], 'these': [141], 'different': [144], 'CEMP': [145, 211], 'classes.': [146], 'confirm': [150, 198], 'existence': [152], 'plateau': [155, 178, 204], 'at': [156, 179, 213], 'A(C)=': [157], '8.25': [158], 'for': [159], '[Fe/H]': [160], '\\geq': [161], '-3.4.': [162], 'most': [164], '([Fe/H]': [167], '<': [168], '-3.4)': [169], 'have': [170], 'significantly': [171], 'lower': [172, 177], 'abundances,': [174], 'suggesting': [175], 'A(C)': [180], '\\approx': [181], '6.5.': [182], 'Detailed': [183], 'analyses': [184], 'larger': [187], 'sample': [188], 'low': [191, 215], 'metallicity': [192], 'carbon-rich': [193], 'required': [196], 'refute)': [200], 'this': [201], 'possible': [202], 'second': [203], 'specify': [206], 'behavior': [208], 'metallicity.': [216]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W3100157999', 'counts_by_year': [{'year': 2023, 'cited_by_count': 5}, {'year': 2022, 'cited_by_count': 2}, {'year': 2021, 'cited_by_count': 4}, {'year': 2020, 'cited_by_count': 7}, {'year': 2019, 'cited_by_count': 9}, {'year': 2018, 'cited_by_count': 6}, {'year': 2017, 'cited_by_count': 5}, {'year': 2016, 'cited_by_count': 8}, {'year': 2015, 'cited_by_count': 6}, {'year': 2014, 'cited_by_count': 5}, {'year': 2013, 'cited_by_count': 1}], 'updated_date': '2024-09-24T20:20:26.982218', 'created_date': '2020-11-23'}