Cores2Deeper - Deep imaging of Very Low Mass Objects discovered by c2d

Details Cores2Deeper - Deep imaging of Very Low Mass Objects discovered by c2d Cores2Deeper - Deep imaging of Very Low Mass Objects discovered by c2d

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20386m&link_type=abstract

Spitzer Proposal ID #20386

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Scientific paper

We propose a program of deep IRAC and MIPS 24 micron observations of a sample of cores from the c2d Legacy program. About half of these cores contain newly discovered low luminosity objects, which we call very low mass objects, or VLMOs. The VLMOs are candidate young stars, or even substellar objects. The first such example, L1014-IRS, shows several properties common to young stellar objects, including near-infrared excess suggestive of disk emission, a fan-shaped scattered light nebulosity suggestive of an outflow cavity, and a bipolar CO outflow of remarkably small extent (<1000 AU). The protostellar nature of the other candidates, for the most part, remains to be confirmed, which is the goal of this proposal. With observations that will be three times more sensitive than c2d, we will be able to determine accurate SEDs of the sample, search for faint extended nebulosity, and search for even fainter companions to the VLMOs, all important aspects to confirming their association with the cores and their low mass nature. We will also observe to equal sensitivity a sample of otherwise similar c2d cores which show no signs of associated VLMOs, in order to detect even fainter VLMOs, or place strict upper limits on the luminosity of any embedded source. For both the VLMOs and starless cores, the IRAC data will detect fainter background stars than c2d and enable the core density structure to be probed to small scales near the extinction peaks.

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