Title: Evidence for clustering of field horizontal-branch stars in the Galactic halo
Abstract: view Abstract Citations (49) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Evidence for Clustering of Field Horizontal-Branch Stars in the Galactic Halo Doinidis, Steve P. ; Beers, Timothy C. Abstract An investigation of the clustering of field horizontal-branch stars in the Galactic halo is reported which examines this question using a catalog of over 4400 candidate field horizontal-branch stars distributed over roughly 2300 sq deg of sky, primarily in the southern Galactic hemisphere. A two-point correlation analysis indicates that the catalog contains an excess of stellar pairs with angular separations of less than 10 arcsec; at the approximate distances of these stars (5-8 kpc from the Sun) the corresponding linear separations are r of less than 25 pc. The possible connection with loose groups of halo field horizontal-branch stars noted previously by Sommer-Larsen and Christensen (1987) and by Beers and Doinidis (1988) is discussed. Publication: The Astrophysical Journal Pub Date: May 1989 DOI: 10.1086/185438 Bibcode: 1989ApJ...340L..57D Keywords: Horizontal Branch Stars; Milky Way Galaxy; Stellar Spectrophotometry; Distance; Monte Carlo Method; Spectral Line Width; Astrophysics; CLUSTERS: ASSOCIATIONS; STARS: HORIZONTAL-BRANCH full text sources ADS |