SIMBAD references

2015ApJ...814...22E - Astrophys. J., 814, 22 (2015/November-3)

Detection of infall in the protostar B335 with ALMA.

EVANS N.J., DI FRANCESCO J., LEE J.-E., JORGENSEN J.K., CHOI M., MYERS P.C. and MARDONES D.

Abstract (from CDS):

Observations of the isolated globule B335 with ALMA have yielded absorption features against the continuum that are redshifted from the systemic velocity in both HCN and HCO+ lines. These features provide unambiguous evidence for infall toward a central luminosity source. Previously developed models of inside-out collapse can match the observed line profiles of HCN and HCO+ averaged over the central 50 AU. At the new distance of 100 pc, the inferred infall radius is 0.012 pc, the mass infall rate is 3x10–6 M/yr, the age is 5x104 years, and the accumulated mass in the central zone is 0.15, most of which must be in the star or in parts of a disk that are opaque at 0.8 mm. The continuum detection indicates an optically thin mass (gas and dust) of only 7.5x10–4 in the central region, consistent with only a very small disk mass.

Abstract Copyright:

Journal keyword(s): ISM: individual: B335 - line: profiles - stars: formation

Simbad objects: 8

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2021.07.29-15:46:59

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