Journal
ASTROPHYSICAL JOURNAL
Volume 743, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/743/2/201
Keywords
ISM: clouds; ISM: individual objects (L1451, Perseus); ISM: molecules; stars: formation; stars: low-mass
Categories
Funding
- INSU/CNRS (France)
- MPG (Germany)
- IGN (Spain)
- Smithsonian Institution
- Academia Sinica
- state of California
- state of Illinois
- state of Maryland
- James S. McDonnell Foundation
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- University of Chicago
- Associates of the California Institute of Technology
- National Science Foundation
- NSF [AST-9613615]
- Association of Universities for Research in Astronomy, Inc. [AF002]
- Fundacion Andes [C-13442]
- NRAO [GSSP06-0015, GSSP08-0031]
- National Science Foundation [AST-0407172, AST-0908159, AST-0845619]
- NASA Origins [NXX09AB89G]
- MICINN [AYA2008-06189-C03-01]
- Junta de Andalucia
- Associated Universities, Inc.
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0845619, 0908159] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/F002092/1, ST/I001557/1] Funding Source: researchfish
- STFC [ST/F002092/1, ST/I001557/1] Funding Source: UKRI
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We present the detection of a dust continuum source at 3 mm (CARMA) and 1.3 mm (Submillimeter Array, SMA), and (CO)-C-12 (2-1) emission (SMA) toward the L1451-mm dense core. These detections suggest a compact object and an outflow where no point source at mid-infrared wavelengths is detected using Spitzer. An upper limit for the dense core bolometric luminosity of 0.05 L-circle dot is obtained. By modeling the broadband spectral energy distribution and the continuum interferometric visibilities simultaneously, we confirm that a central source of heating is needed to explain the observations. This modeling also shows that the data can be well fitted by a dense core with a young stellar object (YSO) and a disk, or by a dense core with a central first hydrostatic core (FHSC). Unfortunately, we are not able to decide between these two models, which produce similar fits. We also detect (CO)-C-12 (2-1) emission with redshifted and blueshifted emission suggesting the presence of a slow and poorly collimated outflow, in opposition to what is usually found toward YSOs but in agreement with prediction from simulations of an FHSC. This presents the best candidate, so far, for an 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 low-mass star formation.
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