TheSpitzerc2d Survey of Large, Nearby, Interstellar Clouds. V. Chamaeleon II Observed with IRAC | Zendy

Alicia Porras | Zendy; J. K. Jørgensen | Zendy; Lori Allen | Zendy; Neal J. Evans | Zendy; Tyler L. Bourke | Zendy; J. M. Alcalà | Zendy; Michael M. Dunham | Zendy; Geoffrey A. Blake | Zendy; Nicholas Chapman | Zendy; Lucas A. Cieza | Zendy; P. M. Harvey | Zendy; Tracy L. Huard | Zendy; D. W. Koerner | Zendy; Lee G. Mundy | Zendy; Philip C. Myers | Zendy; Deborah Padgett | Zendy; Anneila I. Sargent | Zendy; Karl R. Stapelfeldt | Zendy; Peter Teuben | Zendy; E. F. van Dishoeck | Zendy; Z. Wahhaj | Zendy; Kaisa E. Young | Zendy

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TheSpitzerc2d Survey of Large, Nearby, Interstellar Clouds. V. Chamaeleon II Observed with IRAC

Author(s) -

Alicia Porras,

J. K. Jørgensen,

Lori Allen,

Neal J. Evans,

Tyler L. Bourke,

J. M. Alcalà,

Michael M. Dunham,

Geoffrey A. Blake,

Nicholas Chapman,

Lucas A. Cieza,

P. M. Harvey,

Tracy L. Huard,

D. W. Koerner,

Lee G. Mundy,

Philip C. Myers,

Deborah Padgett,

Anneila I. Sargent,

Karl R. Stapelfeldt,

Peter Teuben,

E. F. van Dishoeck,

Z. Wahhaj,

Kaisa E. Young

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/510422

Subject(s) - physics , astrophysics , molecular cloud , interstellar cloud , interstellar medium , galaxy , young stellar object , astronomy , stars , star formation

We present IRAC (3.6, 4.5, 5.8, and 8.0 micron) observations of the Chamaeleon II molecular cloud. The observed area covers about 1 square degree defined by $A_V >2$. Analysis of the data in the 2005 c2d catalogs reveals a small number of sources (40) with properties similar to those of young stellaror substellar objects (YSOs). The surface density of these YSO candidates is low, and contamination by background galaxies appears to be substantial, especially for sources classified as Class I or flat SED. We discuss this problem in some detail and conclude that very few of the candidate YSOs in early evolutionary stages are actually in the Cha II cloud. Using a refined set of criteria, we define a smaller, but more reliable, set of 24 YSO candidates

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