Infrared Array Camera (IRAC) Colors of Young Stellar Objects

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Authors

Shadab Alam · Harvard University

Nuria Calvet · Center for Astrophysics Harvard & Smithsonian

Paola D’Alessio

B. Merín · Instituto de Física Fundamental

Lee Hartmann · Center for Astrophysics Harvard & Smithsonian

S. T. Megeath · Harvard University

Robert Gutermuth · University of Rochester

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. 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: S140, S171, NGC 7129, and Cep C. The IRAC color-color diagram ([3.6]-[4.5] vs. [5.8]-[8.0]) can be used to help distinguish between young stars with only disk emission and protostars with circumstellar envelopes.

Topics & Keywords

Astrophysics and Star Formation Studies Stellar, planetary, and galactic studies Molecular Spectroscopy and Structure

Publication Details

Published in: The Astrophysical Journal Supplement Series

Volume 154, Issue 1, pp. 363-366

DOI: 10.1086/422715

Field-Weighted Citation Impact: 13.21

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Infrared Array Camera (IRAC) Colors of Young Stellar Objects

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Abstract

Topics & Keywords

Publication Details