Star formation associated with a large-scale infrared bubble

Abstract

Using the data from the Galactic Ring Survey (GRS) and Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE), we performed a study for 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 the Purple Mountain Observation (PMO) 13.7 m radio telescope to investigate the detailed distribution of associated molecular material. The large-scale infrared bubble shows a half-shell morphology at 8 um. H II regions 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 um 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. C18O J=1-0 emission presents four cloud clumps on the northeastern border of H II region G53.54-0.01. Via comparing the spectral profiles of 12CO J=1-0, 13CO J=1-0, and C18O J=1-0 peak at each clump, we found the collected gas in the three clumps, except for the clump coincided with a massive YSO (IRAS 19282+1814). Using the evolutive model of H II region, we derived that the age of H II region G53.54-0.01 is 1.5*10^6 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 (CC) process.

9 pages, 6 figures, accepted for publication in A&A

References in corpus (16)

• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
• The SCUBA Legacy Catalogue: Continuum Objects Detected by SCUBA
• The Green Bank Telescope HII Region Discovery Survey II. The Source Catalog
• Chandra Observation of SNR G54.1+0.3 -- a Close Cousin of the Crab Nebula
• Triggered star formation on the borders of the Galactic HII region RCW 82
• Discovery of a 136 millisecond radio and X-ray pulsar in SNR G54.1+0.3
• A Search for Infall Evidence in EGOs I: the Northern Sample
• Triggered Star Formation and Dust around Mid-Infrared-Identified Bubbles
• Distance Determination to the Crab-like PWN G54.1+0.3 and Search for its Supernova Remnant Shell
• Massive-Star Forming Infrared Loop around the Crab-like Supernova Remnant G54.1+0.3: Post Main-Sequence Triggered Star Formation?
• A 1-mm spectral line survey toward GLIMPSE Extended Green Objects (EGOs)
• The infrared dust bubble N22: an expanding HII region and the star formation around it
• Multi-wavelength study of triggered star formation around mid-infrared bubble N14
• Investigation of Molecular Cloud Structure around Infrared Bubbles: CARMA Observations of N14, N22, and N74

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• Nobeyama 45 m Local Spur CO survey. I. Giant molecular filaments and cluster formation in the Vulpecula OB association
• Colliding interstellar bubbles in the direction of l=54°
• Shape Analysis of HII Regions - I. Statistical Clustering
• Ammonia mapping observations of the Galactic infrared bubble N49: Three NH${}_3$ clumps along the molecular filament
• Gas structure and dynamics towards bipolar infrared bubble