A multi-wavelength analysis of the diffuse HII region G25.8700+0.1350
arXiv:1710.02835 · doi:10.1093/mnras/stx2676
Abstract
We present a multiwavelength investigation of the HII region G25.8700+0.1350, located in the inner part of the Galaxy. In radio continuum emission, the region is seen as a bright arc-shaped structure. An analysis of the HI line suggests that G25.8700+0.1350 lies at a distance of 6.5 kpc. The ionized gas is bordered by a photodissociation region which is encircled by a molecular structure where four molecular clumps are detected. At infrared wavelengths, the region is also very conspicuous. Given the high level of visual absorption in the region, the exciting stars should be searched for in the infrared band. In this context, we found in the literature one Wolf-Rayet and one red supergiant which, together with 37 2MASS sources candidates to be O-type stars, could be related to the origin of G25.8700+0.1350. Finally, as expanding HII regions are hypothesized to trigger star formation, we used different infrared point source catalogues to search for young stellar object candidates (cYSOs). A total of 45 cYSOs were identified projected onto the molecular clouds.
arXiv comment15 pages, 12 figures, 6 tables. Accepted for publication in MNRAS
References in corpus (37)
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
- The Spitzer Space Telescope Mission
- The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
- The Herschel-SPIRE instrument and its in-flight performance
- The Milky Way in Molecular Clouds: A New Complete CO Survey
- Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
- GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
- Toward Understanding Massive Star Formation
- A new calibration of stellar parameters of Galactic O stars
- Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
- A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
- The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
- Hi-GAL: the Herschel infrared Galactic Plane Survey
- The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought
- The VLA Galactic Plane Survey
- The WISE Catalog of Galactic HII Regions
- UBVJHK synthetic photometry of Galactic O stars
- The Bolocam Galactic Plane Survey: Survey Description and Data Reduction
- How Many Infrared Dark Clouds can form Massive Stars and Clusters?
- A massive cluster of Red Supergiants at the base of the Scutum-Crux arm
- Resolution of the Distance Ambiguity for Galactic HII Regions
- Discovery of an Extraordinarily Massive Cluster of Red Supergiants
- The Electron Temperature Gradient in the Galactic Disk
- The Population of the Galactic Plane as Seen by MSX
- The cool supergiant population of the massive young star cluster RSGC1
- Radio Recombination Lines in Galactic HII Regions
- Resolution of Distance Ambiguities of Inner Galaxy Massive Star Formation Regions II
- The Molecular Properties of Galactic HII Regions
- Red Eyes on Wolf-Rayet Stars: 60 New Discoveries via Infrared Color Selection
- A COMPLETE Look at The Use of IRAS Emission Maps to Estimate Extinction and Dust Temperature
- The Bolocam Galactic Plane Survey. X. A Complete Spectroscopic Catalog of Dense Molecular Gas Observed toward 1.1 mm Dust Continuum Sources with 7.5 <= l <= 194 degrees
- Pseudo Three-dimensional Maps of the Diffuse Interstellar Band at 862 nm
- Red supergiants around the obscured open cluster Stephenson 2
- A high resolution HI study towards the supernova remnant Puppis A and its environments
- Red supergiants and stellar evolution
- Maps of Massive Clumps in the Early Stage of Cluster Formation: Two Modes of Cluster Formation, Coeval or Non-Coeval?