Very Low Luminosity Objects: Investigating the Lowest Luminosity, Embedded Protostars with Spectra from 5-100 microns

Details Very Low Luminosity Objects: Investigating the Lowest Luminosity, Embedded Protostars with Spectra from 5-100 microns Very Low Luminosity Objects: Investigating the Lowest Luminosity, Embedded Protostars with Spectra from 5-100 microns

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30563d&link_type=abstract

Spitzer Proposal ID #30563

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Scientific paper

One of the most surprising results from the Spitzer Space Telescope Legacy Project "From Molecular Cores to Planet Forming Disks" has been the discovery of a very low luminosity protostar (L ~ 0.1 Lsun) in L1014, a dense core previously believed to be starless. Other, similar objects have now been discovered in other cores as well, leading to the definition of a new class of Very Low Luminosity Objects. These objects are difficult to understand in the standard model of star formation, they either feature mass accretion rates much lower than predicted, masses far below the stellar/substellar boundary, or some combination of the two. Understanding these objects is essential for the development of a complete picture of low-mass star and brown dwarf formation. We propose a project to obtain low-resolution IRS and MIPS SED mode spectra of 17 of these Very Low Luminosity Objects at wavelengths ranging from 5 to 100 microns. These observations will allow us to place constraints on the luminosities of these sources not possible with existing data. This will allow us to confirm the current results suggesting these sources all have luminosities less than or equal to 0.1 Lsun. We will also use the observations to probe the properties of the dust in the regions surrounding these heavily embedded objects. Finally, they will allow us to investigate the presence and properties of circumstellar disks around these objects, and through this, a possible explanation for their very low luminosities.

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