IRAC Colors of Young Stellar Objects
Abstract
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope (Werner et al. 2004, Fazio et al. 2004). Disk and envelope models characterized by infall and/or accretion rates found in previous studies can quantitatively account for the range of IRAC colors found in four young embedded clusters: S 140, S 171, NGC 7129, and Cep C. The IRAC color-color diagram ([3.6]-[4.5] vs. [5.8]-[8.0]) can be used to help to distinguish between young stars with only disk emission and protostars with circumstellar envelopes.
Cite
@article{arxiv.astro-ph/0406003,
title = {IRAC Colors of Young Stellar Objects},
author = {Lori E. Allen and Nuria Calvet and Paola D'Alessio and Bruno Merin and Lee Hartmann and S. Thomas Megeath and Robert A. Gutermuth and James Muzerolle and Judith L. Pipher and Philip C. Myers and Giovanni G. Fazio},
journal= {arXiv preprint arXiv:astro-ph/0406003},
year = {2007}
}
Comments
To appear in the Astrophysical Journal Supplement, Special Spitzer Space Telescope Issue