The Enigmatic Dense Core L1451-mm: A First Hydrostatic Core Candidate

Details The Enigmatic Dense Core L1451-mm: A First Hydrostatic Core Candidate The Enigmatic Dense Core L1451-mm: A First Hydrostatic Core Candidate

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21831807p&link_type=abstract

American Astronomical Society, AAS Meeting #218, #318.07; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the detection of a dust continuum source at 93GHz (CARMA) and 230GHz (SMA), and 12CO(2-1) emission (SMA) towards the L1451-mm dense core located in the Perseus Cloud. These detections suggest a compact object and an outflow where no point source is detected using Spitzer. An upper limit for the dense core bolometric luminosity of 0.07Lsun is obtained. We simultaneously model the broadband SED and the continuum visibilities, and the modeling confirms that a central source of heating is needed to explain the observations. It also shows that the data can be well fitted by a dense core with a YSO and disk, or by a dense core with a central First Hydrostatic Core (FHSC). Unfortunately, we are not able to rule out any of these two models, which produce similar fits. We also detect 12CO(2-1) emission with red- and blue-shifted emission suggesting the presence of a slow and poorly collimated outflow, in opposition to what is usually found towards young objects but in agreement with prediction from simulations of a FHSC. This presents the best candidate, so far, for a FHSC, an object that has been identified in simulations of collapsing dense cores. Whatever the true nature of the central object in L1451-mm, this core presents an excellent laboratory to study the earliest phases of star formation.

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