J/ApJ/830/57 YSO candidates in the dust bubble N10 with WISE (Gama+, 2016)
CO observations and investigation of triggered star formation toward the N10
infrared bubble and surroundings.
Gama D.R.G., Lepine J.R.D., Mendoza E., Wu Y., Yuan J.
<Astrophys. J., 830, 57-57 (2016)>
=2016ApJ...830...57G 2016ApJ...830...57G (SIMBAD/NED BibCode)
ADC_Keywords: Galactic plane ; YSOs ; Photometry, infrared ;
Interstellar medium
Keywords: H II regions; ISM: bubbles; ISM: molecules; stars: formation
Abstract:
We studied the environment of the dust bubble N10 in molecular
emission. Infrared bubbles, first detected by the GLIMPSE survey at
8.0µm, are ideal regions to investigate the effect of the expansion
of the HII region on its surroundings and the eventual triggering of
star formation at its borders. In this work, we present a
multi-wavelength study of N10. This bubble is especially interesting
because infrared studies of the young stellar content suggest a
scenario of ongoing star formation, possibly triggered on the edge of
the HII region. We carried out observations of 12CO(1-0) and
13CO(1-0) emission at PMO 13.7m toward N10. We also analyzed the IR
and sub-millimeter emission on this region and compare those different
tracers to obtain a detailed view of the interaction between the
expanding HII region and the molecular gas. We also estimated the
parameters of the denser cold dust condensation and the ionized gas
inside the shell. Bright CO emission was detected and two molecular
clumps were identified from which we have derived physical parameters.
We also estimate the parameters for the densest cold dust condensation
and for the ionized gas inside the shell. The comparison between the
dynamical age of this region and the fragmentation timescale favors
the "Radiation-Driven Implosion" mechanism of star formation. N10 is a
case of particular interest with gas structures in a narrow frontier
between the HII region and surrounding molecular material, and with a
range of ages of YSOs situated in the region, indicating triggered
star formation.
Description:
The observations were carried out with the PMO (Purple Mountain
Observatory) 13.7m radio telescope in 2012 June. We observed the J=1-0
transition of 12CO (115.27GHz), 13CO (110.20GHz), and C18O
(109.78GHz). The On-The-Fly (OTF) observing mode was applied to map a
21'x25' region centered at RAJ2000=18:14:01.361; DEJ2000=-17:28:23.14.
For the 13.7m PMO antenna, we have considered a half-power beam width
(HPBW) around 52".
Public data from infrared to centimeter surveys was used to analyze
the bubble N10 at other wavelengths. The GLIMPSE survey (Benjamin+
2003PASP..115..953B 2003PASP..115..953B) mapped parts of the inner Galactic plane, with
the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We
obtained images of 4.5, 5.8, and 8.0um IRAC bands (see Figure 3). The
24um image of N10 was obtained from another survey of the inner
Galactic plane, MIPSGAL, using the MIPS instrument.
N10 was mapped at sub-millimeter wavelengths with the APEX telescope.
The images at 870um wavelength were obtained with ATLASGAL (APEX
Telescope Large Area Survey of the Galaxy), an observing program using
the LABOCA (Large Apex BOlometer CAmera instrument).
We used the Multi-Array Galactic Plane Imaging Survey (MAGPIS) website
to obtain the images presented in Figure 3 which also shows the VLA
20cm emission.
We also used the all-sky Wide-field Infrared Survey Explorer satellite
(WISE) data to analyze the content of YSOs in N10.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
18 14 01.3 -17 28 23 N10 = [CPA2006] N10
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 83 234 Young stellar objects (YSO) candidates towards
the N10 region
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See also:
II/328 : AllWISE Data Release (Cutri+ 2013)
VIII/58 : A Survey of Radio H II Regions in the Northern Sky (Lockman+ 1989)
J/ApJ/797/40 : YSO candidates in the IR dust bubble N6 (Yuan+, 2014)
J/ApJS/212/1 : The WISE catalog of Galactic HII regions (Anderson+, 2014)
J/MNRAS/424/2442 : Catalog of bubbles from Milky Way Project (Simpson+, 2012)
J/A+A/542/A101 : LABOCA 870um mapping of 4 Galactic plane fields
(Miettinen, 2012)
J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)
J/ApJ/670/428 : Bubbles in the galactic disk. II. (Churchwell+, 2007)
J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)
http://third.ucllnl.org/gps/ : MAGPIS home page
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Candidate running number
5- 11 F7.4 deg GLON Galactic longitude
13- 19 F7.4 deg GLAT Galactic latitude
21- 39 A19 --- WISEA Identification (JHHMMSS.ss+DDMMSS.s)
41- 46 F6.3 mag 3.4mag [7.2/12.7] AllWISE 3.4um (W1) magnitude
48- 53 F6.3 mag 4.6mag [6.4/12.3] AllWISE 4.6um (W2) magnitude
55- 60 F6.3 mag 12mag [1.6/11.2] AllWISE 12um (W3) magnitude
62- 67 F6.3 mag 22mag [-3/8.2] AllWISE 22um (W4) magnitude
69- 83 A15 --- Class Classification (12 "Class I", 91 "Class II"
and 131 "Transition Disk")
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 18-Jan-2017