Observing the First Hydrostatic Core: A Candidate Detection in Per-Bolo 58

Details Observing the First Hydrostatic Core: A Candidate Detection in Per-Bolo 58 Observing the First Hydrostatic Core: A Candidate Detection in Per-Bolo 58

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21642210e&link_type=abstract

American Astronomical Society, AAS Meeting #216, #422.10

Astronomy and Astrophysics

Astronomy

Scientific paper

We present an excellent candidate for observational verification of the first hydrostatic core (FHSC). The FHSC is a theoretically predicted phase in the low-mass star formation process (Larson 1969), between the initiation of core collapse the the formation of a true protostar; this large (5 AU), cool (100 K) hydrostatically supported core of molecular hydrogen has so far not been directly observed. We obtained deep Spitzer 70 micron images of a sample of seven target dense starless cores, and detected one, Per-Bolo 58, at the level expected for the FHSC. A low signal-to-noise detection at 24 micron leaves open the possibility that this could be a very low luminosity protostar, however. We use radiative transfer models (Dullemond & Dominik 2004) to determine the best-fitting FHSC and protostar to the spectral energy distribution (SED) and 2.9 mm intensity profile (Schnee et al. 2010) of Per-Bolo 58. The SED is consistent with a FHSC with some source of lower envelope opacity that allows 24 micron emission to escape: a small outflow cavity, a cavity in the envelope, or a clumpy envelope. Although we are unable to rule out the presence of a protostar, if present it would be one of the lowest luminosity protostars known (internal luminosity 0.01 Lsun).

Affiliated with

Also associated with

No associations

Rating

Observing the First Hydrostatic Core: A Candidate Detection in Per-Bolo 58 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observing the First Hydrostatic Core: A Candidate Detection in Per-Bolo 58, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observing the First Hydrostatic Core: A Candidate Detection in Per-Bolo 58 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1891529