J/MNRAS/394/900 Infrared colors in HII region Sh2-173 (Cichowolski+, 2009)
Unveiling the birth and evolution of the HII region Sh2-173.
Cichowolski S., Romero G.A., Ortega M.E., Cappa C.E., Vasquez J.
<Mon. Not. R. Astron. Soc., 394, 900-915 (2009)>
=2009MNRAS.394..900C 2009MNRAS.394..900C
ADC_Keywords: H II regions ; Photometry, infrared
Keywords: stars: formation - H II regions - ISM: individual: Sh2-173 -
ISM: kinematics and dynamics
Abstract:
Based on a multiwavelength study, the interstellar medium around the
HII region Sh2-173 has been analysed. The ionized region is clearly
detected in the optical and the radio continuum images. The analysis
of the H i data shows a region of low emissivity that has an excellent
morphological correlation with the radio continuum emission. The HII
region is partially bordered by a photodissociation region, which, in
turn, is encircled by a molecular structure. The HI and CO structures
related to Sh2-173 are observed in the velocity ranges from -25 to
-31km/s and from -27 to -39km/s, respectively.
Description:
Radio continuum data at 408 and 1420MHz, as well as 21cm spectral
line data, were obtained using the Dominion Radio Astrophysical
Observatory (DRAO) interferometer as part of the Canadian Galactic
Plane Survey (CGPS) (Taylor et al. 2003, Cat. B/cgps).
Radio continuum surveys at 325MHz (WENSS) (Rengelink et al., 1997,
Cat. J/A+AS/124/259), 2695MHz (Fuerst et al., 1990A&AS...85..691F 1990A&AS...85..691F)
and 4850MHz (Condon et al., 1994AJ....107.1829C 1994AJ....107.1829C) were also used in
this work.
Mid-IR data were taken from the Midcourse Space Experiment (MSX)
Galactic Plane Survey (Price et al., 2001AJ....121.2819P 2001AJ....121.2819P), and near-IR
data were obtained from the 2MASS All-Sky Point Source Catalog
(Skrutskie et al. 2006, Cat. VII/233).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 110 46 YSO candidates projected on to the molecular
Clouds A and B
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See also:
B/cgps : Log of CGPS exposures (Taylor+, 2003-)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+AS/124/259 : Westerbork Northern Sky Survey I. (Rengelink+ 1997)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Sel Selection criteria for 2MASS YSO candidates (1)
5- 6 I2 --- [CRO2009] Sequential number
8- 29 A22 --- Name IRAS or 2MASS name
31- 37 F7.3 deg GLON Galactic longitude
39- 44 F6.3 deg GLAT Galactic latitude
46 A1 --- l_Jmag Limit flag on Jmag
47- 52 F6.3 mag Jmag ? 2MASS J magnitude
54 A1 --- l_Hmag Limit flag on Hmag
55- 60 F6.3 mag Hmag ? 2MASS H magnitude
62- 68 F7.4 mag Kmag ? 2MASS K magnitude
69 A1 --- l_H-K Limit flag on H-K
70- 74 F5.3 mag H-K ? 2MASS H-K colour index
76 A1 --- l_J-H Limit flag on J-H
77- 81 F5.3 mag J-H ? 2MASS J-H colour index
83- 84 A2 --- Gr Group location in Fig. 9 (g1 to g4)
86- 89 F4.2 Jy F12 ? IRAS 12um flux
91- 94 F4.2 Jy F25 ? IRAS 25um flux
96- 99 F4.2 Jy F60 ? IRAS 60um flux
101-105 F5.2 Jy F100 ? IRAS 100um flux
107 A1 --- l_LIRAS [~] Limit flag on LIRAS
108-110 I3 solLum LIRAS ? IRAS luminosity for D=2.5kpc
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Note (1): Selection criteria for 2MASS YSO candidates:
P1 = (J-H)>0.835, (J-H)<1.7(H-K)-0.087
P1+ = 1.135<(J-H)<1.435, (J-H)>1.7(H-K)-0.087,
(J-H)<1.7(H-K)+0.3685, K>14.5
P2 = (J-H)L<1.7(H-K)-0.087, (H-K)>0.91
(subscript 'L' indicates a lower limit)
P3 = (H-K)L>0.91 (subscript 'L' indicates a lower limit)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Oct-2009