J/A+A/496/177 JHKs and GLIMPSE photometry of RCW 120 (Deharveng+, 2009)
Star formation around RCW 120, the perfect bubble.
Deharveng, L., Zavagno A., Schuller F., Caplan J., Pomares M., De Breuck C.
<Astron. Astrophys. 496, 177 (2009)>
=2009A&A...496..177D 2009A&A...496..177D
ADC_Keywords: H II regions ; Stars, early-type ; Photometry, infrared ;
Keywords: stars: formation - stars: early-type - ISM: H II regions -
ISM: individual objects: RCW 120
Abstract:
This study deals with the star formation triggered by HII regions.
We wish to take advantage of the very simple morphology of RCW 120 -
a perfect bubble - to understand the mechanisms triggering star
formation around an HII region and to establish what kind of stars are
formed there.
We present 870um observations of RCW 120, obtained with the
APEX-LABOCA camera. These show the distribution of cold dust, and thus
of neutral material. We use Spitzer-MIPS observations at 24um and 70um
to detect the young stellar objects present in this region and to
estimate their evolutionary stages.
Description:
Table 1 presents our measured 24um magnitudes along with these
objects, 1.25um to 8.0um magnitudes taken from the 2MASS and
Spitzer-GLIMPSE catalogues.
Column 1 gives an identification number. Columns 2 and 3 are the
coordinates according to the Spitzer-GLIMPSE catalogues. Columns 4 to
10 give the J, H, K, [3.6], [4.5], [5.8], and [8.0] magnitudes. These
are extracted from the (highly reliable) GLIMPSE I Spring 07
Catalog. When necessary they have been supplemented with values from
the (less reliable) GLIMPSE I Spring 07 Archive, and by the 2MASS
All-Sky Point Source Catalog (a colon indicates an uncertain
measurement). Columns 11 and 12 give our 24um and 70um
measurements. Five bright sources which have [24]<1.38mag (as
indicated by a colon) are clearly saturated at 24um. Column 13
gives our conclusions concerning the evolutionary stages of the
sources (see Sect. 4).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 138 Photometry of the 24 µm sources
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
http://www.astro.wisc.edu/glimpse/ : GLIMPSE Home Page
J/A+A/472/835 : JHKs and GLIMPSE photometry of RCW 120 (Zavagno+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Identification number
5- 15 F11.7 deg RAdeg Right ascension in decimal degrees (J2000)
17- 27 F11.7 deg DEdeg Declination in decimal degrees (J2000)
29- 34 F6.3 mag Jmag ? J magnitude
35 A1 --- u_Jmag Uncertainty flag on Jmag
37- 42 F6.3 mag Hmag ? H magnitude
43 A1 --- u_Hmag Uncertainty flag on Hmag
45- 50 F6.3 mag Kmag ? K magnitude
51 A1 --- u_Kmag Uncertainty flag on Kmag
53- 58 F6.3 mag [3.6] ? 3.6-micron magnitude
59 A1 --- u_[3.6] Uncertainty flag on [3.6]
61- 66 F6.3 mag [4.5] ? 4.5-micron magnitude
67 A1 --- u_[4.5] Uncertainty flag on [4.5]
69- 74 F6.3 mag [5.8] ? 5.8-micron magnitude
75 A1 --- u_[5.8] Uncertainty flag on [5.8]
77- 82 F6.3 mag [8.0] ? 8.0-micron magnitude
83 A1 --- u_[8.0] Uncertainty flag on [8.0]
85- 88 F4.2 mag [24] 24-micron magnitude
89 A1 --- u_[24] Uncertainty flag on [24]
91- 94 F4.1 Jy F(70) ? 70-micron flux
96-102 A7 --- Class Class of object (1)
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Note (1): class "I-flat" is assigned to sources which are possibly flat
spectrum sources mistaken for Class I because of a large external
extinction
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Acknowledgements:
James Caplan, james.caplan(at)oamp.fr
(End) J. Caplan [Lab. d'Astrophysique Marseille], P. Vannier [CDS] 16-Mar-2009