2014A&A...569A..36X


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.18CEST07:41:13

2014A&A...569A..36X - Astronomy and Astrophysics, volume 569A, 36-36 (2014/9-2)

Star formation associated with a large-scale infrared bubble.

XU J.-L. and JU B.-G.

Abstract (from CDS):

To investigate how a large-scale infrared bubble centered at l=53.9° and b=0.2° forms, and to study if star formation is taking place at the periphery of the bubble, we performed a multiwavelength study. Using the data from the Galactic Ring Survey (GRS) and Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE), we performed a study of a large-scale infrared bubble with a size of about 16 pc at a distance of 2.0 kpc. We present the 12CO J=1-0, 13CO J=1-0, and C18O J=1-0 observations of HII region G53.54-0.01 (Sh2-82) obtained at the Purple Mountain Observation (PMO) 13.7 m radio telescope to investigate the detailed distribution of associated molecular material. In addition, we also used radiorecombination line and VLA data. To select young stellar objects (YSOs) consistent with this region, we used the GLIMPSE I catalog. The large-scale infrared bubble shows a half-shell morphology at 8 µm. The H II regions of G53.54-0.01, G53.64+0.24, and G54.09-0.06 are situated on the bubble. Comparing the radio recombination line velocities and associated 13CO J=1-0 components of the three H II regions, we found that the 8 µm emission associated with H II region G53.54-0.01 should belong to the foreground emission, and only overlap with the large-scale infrared bubble in the line of sight. Three extended green objects (EGOs, the candidate massive young stellar objects), as well as three H II regions and two small-scale bubbles are found located in the G54.09-0.06 complex, indicating an active massive star-forming region. Emission from C18O at J=1-0 presents four cloud clumps on the northeastern border of H II region G53.54-0.01. By comparing the spectral profiles of 12CO J=1-0, 13CO J=1-0, and C18O J=1-0 at the peak position of each clump, we found the collected gas in the three clumps, except for the clump coinciding with a massive YSO (IRAS 19282+1814). Using the evolutive model of the H II region, we derived that the age of H II region G53.54-0.01 is 1.5x106 yr. The significant enhancement of several Class I and Class II YSOs around G53.54-0.01 indicates the presence of some recently formed stars, which may be triggered by this H II region through the collect-and-collapse process.

Abstract Copyright:

Journal keyword(s): stars: early-type - HII regions - ISM: individual objects: Sh2-82 - ISM: individual objects: G54.09-0.06 - formation stars:

VizieR on-line data: <Available at CDS (J/A+A/569/A36): list.dat fits/*>

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5467 4
2 [KB94] 65 HII 19 23 38.4 +15 07 39           ~ 6 0
3 [WBN74] W 51 IRS 2 SFR 19 23 40.05 +14 31 07.1           ~ 250 0
4 IRAS 19266+1756 cor 19 28 52.5203 +18 02 39.380           ~ 18 0
5 GAL 053.64+00.24 HII 19 29 41.2 +18 27 18           ~ 6 0
6 SNR G053.9+00.2 SNR 19 30 12 +18 42.8           ~ 9 0
7 LBN 053.54+00.04 HII 19 30 14.9 +18 17 30           ~ 33 0
8 HD 231616 * 19 30 23.2588 +18 15 38.874 10.52 10.77 10.11     B0.5III 24 0
9 JCMTSF J193024.2+182026 smm 19 30 24.2 +18 20 26           ~ 2 0
10 [CPA2006] N115 bub 19 30 24.5 +18 15 40           ~ 10 1
11 IRAS 19282+1814 HII 19 30 28.1 +18 20 53           ~ 35 0
12 PSR J1930+1852 Psr 19 30 30.13 +18 52 14.1           ~ 75 1
13 SNR G054.1+00.3 SNR 19 30 31 +18 52.0           ~ 175 1
14 GAL 054.1-00.1 HII 19 31 40 +18 42.3           ~ 6 0
15 EGO G054.11-0.04 of? 19 31 40.0 +18 43 53           ~ 8 1
16 EGO G054.11-0.05 of? 19 31 42.2 +18 43 45           ~ 5 1
17 IRAS 19294+1836 Y*O 19 31 42.8 +18 42 33           ~ 13 0
18 GAL 054.09-00.06 HII 19 31 43.2 +18 42 27           ~ 7 0
19 [CPA2006] N117 bub 19 31 44.5 +18 43 15           ~ 8 0
20 [CPA2006] N116 bub 19 31 46.6 +18 41 40           ~ 5 0
21 SSTGLMC G054.1098-00.0813 Y*? 19 31 48.800 +18 42 57.06           ~ 10 0

    Equat.    Gal    SGal    Ecl

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2019.08.18-07:41:13

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