Other
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..599h&link_type=abstract
NOAO Proposal ID #2007A-0599
Other
Scientific paper
The Spitzer Space Telescope discovery of L1014-IRS, a mid-IR source with protostellar colors observed toward L1014 (Young et al. 2004), was unexpected since L1014 was previously classified as a starless core. Subsequently, in deep near-IR observations of L1014-IRS, we have detected extended nebulosity similar to that from evacuated cavities around protostars and young stellar objects, helping to resolve previous ambiguities concerning the nature of the source. L1014-IRS is either the youngest low-mass protostar yet detected or the first embedded proto- brown-dwarf observed. Regardless, it represents a new observed class of sources: VeLLOs (Very Low Luminosity Objects). Searching for other VeLLOs and determining their physical properties is crucial for understanding the earliest stage of low-mass star formation and elucidating differences between formation mechanisms for low-mass stars and substellar objects. With the aim of identifying and characterizing a total of ~10 bona-fide VeLLOs, we propose deep near-IR observations for a set of candidates, identified with Spitzer, that will (1) help us discern which candidates are bona-fide VeLLOs as opposed to background galaxies, (2) enable us to reliably estimate the inclination, extent, and structure of their bipolar cavities, and (3) provide a measure of their proximity to the densest parts of the molecular cloud cores by making use of background stars to map the extinction.
Bourke Tyler
Crews Lionel J.
Dunham Mike
Evans Neal J.
Huard Tracy L.
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