Abstract: Sub-arcsecond ( $$0{.\!\!^{\prime \prime }}5$$ ; 80 au) images of the H $$_2$$ CO and CCH lines have been obtained toward the low-mass protostellar source IRAS 15398−3359 in the Lupus 1 cloud with Atacama Large Millimeter/Submillimeter Array. A compact component concentrated in the vicinity of the protostar has been detected as well as a well-collimated outflow cavity extending along the northeast-southwest axis. The inclination angle of the outflow is found to be about $$70{^\circ }$$ based on the observed kinematic structure. This nearly edge-on configuration is in contrast to previous suggestions of a pole-on geometry. The centrally concentrated component is interpreted with the aid of an infalling-rotating envelope model employing the inclination angle obtained from the outflow structure, and the protostellar mass is estimated to be less than $$0.09\ M_\odot $$ . A rotationally-supported disk in this source is hinted at by a weak high-velocity H $$_2$$ CO emission associated with the protostar, to confirm whose presence higher-spatial resolution observations are needed.
Publication Year: 2022
Publication Date: 2022-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 1
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