2007ApJ...656..493P

Query : 2007ApJ...656..493P

2007ApJ...656..493P - Astrophys. J., 656, 493-504 (2007/February-2)

The Spitzer c2d survey of large, nearby, interstellar clouds. V. Chamaeleon II observed with IRAC.

PORRAS A., JORGENSEN J.K., ALLEN L.E., EVANS II N.J., BOURKE T.L., ALCALA J.M., DUNHAM M.M., BLAKE G.A., CHAPMAN N., CIEZA L., HARVEY P.M., HUARD T.L., KOERNER D.W., MUNDY L.G., MYERS P.C., PADGETT D.L., SARGENT A.I., STAPELFELDT K.R., TEUBEN P., VAN DISHOECK E.F., WAHHAJ Z. and YOUNG K.E.

Abstract (from CDS):

We present IRAC (3.6, 4.5, 5.8, and 8.0 µm) observations of the Chamaeleon II molecular cloud. The observed area covers about 1 deg2 defined by AV>2. Analysis of the data in the 2005 c2d catalogs reveals a small number of sources (40) with properties similar to those of young stellar or 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 spectral energy distribution (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.

Abstract Copyright: ∼

Journal keyword(s): Stars: Formation - Stars: Low-Mass, Brown Dwarfs

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
2 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
3 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
4 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
5 IRAS 12340-7958 LP* 12 37 39.7408011816 -80 15 13.707391932   16.11 14.39 13.63 9.81 ~ 108 0
6 NAME Cha III MoC 12 37.8 -80 15           ~ 147 2
7 V* DK Cha TT* 12 53 17.2111480272 -77 07 10.736046012           F0e 149 0
8 NAME Cha II MoC 12 54 -77.2           ~ 361 0
9 2MASS J12533890-7715532 Y*O 12 53 38.9146387776 -77 15 53.247287808           M1.5 12 1
10 2MASS J12534285-7715114 Y*O 12 53 42.856 -77 15 11.48           M6.5 23 0
11 HH 52 HH 12 55 06.4 -76 57 46           ~ 38 0
12 HH 53 HH 12 55 06.4 -76 57 46           ~ 36 0
13 HH 54 HH 12 55 49.5 -76 56 08           ~ 119 0
14 IRAS 12535-7623 Y*O 12 57 11.6949853032 -76 40 11.291754000   17.20 15.00     M0e 45 0
15 2MASS J12590656-7707401 Y*O 12 59 06.56 -77 07 40.1           K4.5 51 0
16 CD-76 565 * 13 01 56.7415598160 -77 33 06.906088728   11.68 9.43     ~ 5 0
17 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
18 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
19 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1

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