J/ApJ/733/L2 YSOs from WISE in Western Circinus cloud (Liu+, 2011)
Wide-field Infrared Survey Explorer observations of young stellar objects in the
Western Circinus molecular cloud.
Liu W.M., Padgett D.L., Leisawitz D., Fajardo-Acosta S., Koenig X.P.
<Astrophys. J., 733, L2 (2011)>
=2011ApJ...733L...2L 2011ApJ...733L...2L
ADC_Keywords: Photometry, infrared ; YSOs ; Molecular clouds
Keywords: infrared: stars - stars: formation - stars: pre-main sequence
Abstract:
The Wide-field Infrared Survey Explorer has uncovered a population of
young stellar objects (YSOs) in the Western Circinus molecular cloud.
Images show the YSOs to be clustered into two main groups that are
coincident with dark filamentary structure in the nebulosity. Analysis
of photometry shows numerous Class I and II objects. The locations of
several of these objects are found to correspond to known dense cores
and CO outflows. Class I objects tend to be concentrated in dense
aggregates, and Class II objects more evenly distributed throughout
the region.
Description:
We present WISE observations of the Western Circinus molecular cloud
core, covering over 1.1deg2 in the four WISE bands. Observations of
the Western Circinus region were taken on 2010 February 22-24.
Positional matching of WISE sources to 2MASS point sources is
automated. Typical positional offsets between WISE and 2MASS are
0.1"-0.2".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 205 206 WISE sources in the Western Circinus cloud
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See also:
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
II/307 : WISE Preliminary Data Release (Cutri+ 2011)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+A/476/1019 : RMS survey of southern candidate massive YSOs (Mottram+, 2007)
J/A+A/352/228 : Transitional YSOs candidates (Magnier+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- WISEP WISE designation (JHHMMSS.ss+DDMMSS.s) (1)
21- 28 F8.2 mJy SJ ? 2MASS J band flux density (2)
30 A1 --- l_SJ [u] Upper limit flag on SJ
32- 37 F6.2 mJy e_SJ ? Uncertainty in SJ
39- 46 F8.2 mJy SH ? 2MASS H band flux density (2)
48 A1 --- l_SH [u] Upper limit flag on SH
50- 56 F7.2 mJy e_SH ? Uncertainty in SH
58- 65 F8.2 mJy SKs ? 2MASS Ks band flux density (2)
67 A1 --- l_SKs [u] Upper limit flag on SKs
69- 74 F6.1 mJy e_SKs ? Uncertainty in SKs
76 A1 --- f_S3.4 Approximate flag on S3.4
77- 84 F8.2 mJy S3.4 ? WISE/W1 (3.4µm) band flux density (2)
86 A1 --- l_S3.4 [u] Upper limit flag on S3.4
88- 94 F7.3 mJy e_S3.4 ? Uncertainty in S3.4
96 A1 --- f_S4.6 Approximate flag on S4.6
97-102 F6.1 mJy S4.6 ? WISE/W2 (4.6µm) band flux density (2)
105-111 F7.2 mJy e_S4.6 ? Uncertainty in 4.6 µm
113 A1 --- f_S12 Approximate flag on S12
114-120 F7.2 mJy S12 ? WISE/W3 (12µm) band flux density (2)
122 A1 --- l_S12 [u] Upper limit flag on S12
124-127 F4.1 mJy e_S12 ? Uncertainty in S12
129 A1 --- f_S22 Approximate flag on S22
130-135 F6.1 mJy S22 ? WISE/W4 (22µm) band flux density (2)
137-140 F4.1 mJy e_S22 ? Uncertainty in S22
142 A1 --- f_alpha Approximate flag on alpha
143-147 F5.2 --- alpha ? IR spectral index α
149-157 A9 --- Class Classification (Flat, I, II, III or MS, or N/A)
159-163 F5.2 [Lsun] logLIR ? Log of IR luminosity (3)
165-205 A41 --- Notes Additional notes (4)
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Note (1): The designation denotes that the extractions and photometry are from
the scope of WISE preliminary data release (Cat. II/307, superseded
by Cat. II/311) and the "operations coadds". These coadds were data
products created with an early version of the WISE data pipeline.
Note that row #95 was corrected at CDS: "J150041.0-630652.9" was
replaced by "J150041.05-630652.9".
Note (2): Fluxes are calculated assuming zero-magnitude fluxes of 1594,
1024, 666.7, 309.54, 171.79, 31.676, and 8.3635Jy for 2MASS J, H, and
Ks, and WISE Bands 1 through 4, respectively.
Note (3): From approximately 1 to 26µm, calculated using WISE and
2MASS data for YSOs with 7-band photometry, and d=700pc.
Note (4):
* "C" denotes sources in crowded regions, where photometry is unreliable
by as much as several tenths of a magnitude. Fluxes for these sources
should be considered estimates.
* "very red" sources (Section 4.3) are noted and an estimate of the
[4.6]-[22] color is provided.
* Sources in the Cir-MMS ([RNC96] Cir-MMS 1 from Reipurth,
1996A&A...314..258R 1996A&A...314..258R ) and vdBH65b (source 65b from Van Den Bergh &
Herbst, 1975, Cat. VII/218) aggregates are noted.
* IRAS sources, Hα stars discovered by Mikami & Ogura
(1994MNRAS.270..199M 1994MNRAS.270..199M; <[MO94] NN> in Simbad), and objects corresponding
to a CO outflow (Bally et al. 1999AJ....117..410B 1999AJ....117..410B) are noted where
they correspond to a single, uncrowded WISE detection.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Nov-2012