Bourke, Tyler L. and Myers, Philip C. and Evans, Neal J., II and Dunham, Michael M. and Kauffmann, Jens and Shirley, Yancy L. and Crapsi, Antonio and Young, Chadwick H. and Huard, Tracy L. and Brooke, Timothy Y. and Chapman, Nicholas and Cieza, Lucas and Lee, Chang Won and Teuben, Peter and Wahhaj, Zahed (2006) The Spitzer c2d survey of nearby dense cores. II. Discovery of a low-luminosity object in the "evolved starless core" L1521F. Astrophysical Journal, 649 (1). L37-L40. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:BOUapjl06
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We present Spitzer Space Telescope observations of the "evolved starless core" L1521F that reveal the presence of a very low luminosity object (L < 0.07 L(.)). The object, L1521F-IRS, is directly detected at mid-infrared wavelengths (>5μm), but only in scattered light at shorter infrared wavelengths, showing a bipolar nebula oriented east-west that is probably tracing an outflow cavity. The nebula strongly suggests that L1521F-IRS is embedded in the L1521F core. Thus, L1521F-IRS is similar to the recently discovered L1014-IRS and the previously known IRAM 04191 in its substellar luminosity and dense core environment. However, these objects differ significantly in their core density, core chemistry, and outflow properties, and some may be destined to be brown dwarfs rather than stars.
|Additional Information:||© 2006 The American Astronomical Society. Received 2006 May 12; accepted 2006 August 4; published 2006 September 11. Support for this work, part of the Spitzer Legacy Science Program, was provided by NASA through contracts 1224608, 1230782, and 1230779 issued by the Jet Propulsion Laboratory, California Institute of Technology, under NASA contract 1407. Support from NASA Origins grants NAG5-13050 (P.C.M.) and NNG04GG24G (N.J.E.) are also acknowledged. C.W.L. acknowledges KOSEF grant R01-2003-000-10513-0. We thank the Lorentz Center in Leiden for hosting several meetings that contributed to this Letter and Rob Gutermuth for supplying the IDL code used to make the color figure.|
|Subject Keywords:||ISM: individual (L1521F, L1521F-IRS)—stars: formation—stars: low-mass, brown dwarfs|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Lindsay Cleary|
|Deposited On:||24 Oct 2006|
|Last Modified:||26 Dec 2012 09:13|
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