Detections of massive stars in the cluster MCM2005b77, in the star-forming regions GRS G331.34$-$00.36 (S62) and GRS G337.92$-$00.48 (S36)

Abstract

Large infrared and millimeter wavelength surveys of the Galactic plane have unveiled more than 600 new bubble HII regions and more than 3000 candidate star clusters. We present a study of the candidate clusters MCM2005b72, DBS2003-157, DBS2003-172, and MCM2005b77, based on near-infrared spectroscopy taken with SofI on the NTT and infrared photometry from the 2MASS, VVV, and GLIMPSE surveys. We find that (1) MCM2005b72 and DBS2003-157 are subregions of the same star-forming region, HII GRS G331.34-00.36 (bubble S62). MCM2005b72 coincides with the central part of this HII region, while DBS2003-157 is a bright mid-infrared knot of the S62 shell. We detected two O-type stars at extinction \Aks=1.0-1.3 mag. Their spectrophotometric properties are consistent with the near-kinematic distance to GRS G331.34-00.36 of 3.9pm0.3 kpc. (2) DBS2003-172 coincides with a bright mid-infrared knot in the S36 shell (GRS G337.92-00.48), where we detected a pair of candidate He I stars embedded in a small cometary nebula. (3) The stellar cluster MCM2005b77 is rich in B-type stars, has an average Aks of 0.91 mag, and is adjacent to the HII region IRAS 16137-5025. The average spectrophotometric distance of $\sim 5.0$ kpc matches the near-kinematic distance to IRAS 16137-5025 of 5.2pm0.1 kpc.

arXiv comment22 pages, 11 Figures, ApJ accepted

References in corpus (59)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• 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
• A new calibration of stellar parameters of Galactic O stars
• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• ATLASGAL - The APEX Telescope Large Area Survey of the Galaxy at 870 microns
• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• A three-dimensional Galactic extinction model
• ATLASGAL --- properties of a complete sample of Galactic clumps
• The Galactic WN stars: Spectral analyses with line-blanketed model atmospheres versus stellar evolution models with and without rotation
• UBVJHK synthetic photometry of Galactic O stars
• ATLASGAL --- towards a complete sample of massive star forming clumps
• Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane
• The Milky Way Project First Data Release: A Bubblier Galactic Disk
• A systematic survey for infrared star clusters with |b|<20deg using 2MASS
• Properties of Hi-GAL clumps in the inner Galaxy]{The Hi-GAL compact source catalogue. I. The physical properties of the clumps in the inner Galaxy ($-71.0^{\circ }<\ell <67.0^{\circ }$)
• New infrared star clusters in the southern Milky Way with 2MASS
• Stellar and wind properties of massive stars in the central parsec of the Galaxy
• A Medium Resolution Near-Infrared Spectral Atlas of O and Early B Stars
• IR Dust Bubbles: Probing the Detailed Structure and Young Massive Stellar Populations of Galactic HII Regions
• Discovery of an Extraordinarily Massive Cluster of Red Supergiants
• Really Cool Stars and the Star Formation History at the Galactic Center
• A downward revision to the distance of the 1806-20 cluster and associated magnetar from Gemini near-Infrared spectroscopy
• Constraints on Massive Star Formation: Cygnus OB2 was always an Association
• ATLASGAL-selected massive clumps in the inner Galaxy: I. CO depletion and isotopic ratios
• New Galactic Star Clusters Discovered in the VVV Survey
• New infrared star clusters and candidates in the Galaxy detected with 2MASS
• ATLASGAL - Kinematic distances and the dense gas mass distribution of the inner Galaxy
• ATLASGAL-selected massive clumps in the inner Galaxy III. Dust Continuum Characterization of an Evolutionary Sample
• Near-infrared proper motions and spectroscopy of infrared excess sources at the Galactic Center
• Cygnus OB2 DANCe: A high precision proper motion study of the Cygnus OB2 association
• The G305 star-forming complex: the central star clusters Danks 1 and Danks 2
• Metallicity of Red Giants in the Galactic Bulge from Near-Infrared Spectroscopy
• Interstellar Weather Vanes: GLIMPSE Mid-Infrared Stellar-Wind Bowshocks in M17 and RCW49
• The rate and latency of star formation in dense, massive clumps in the Milky Way
• 86 GHz SiO maser survey of late-type stars in the Inner Galaxy III. Interstellar extinction and colours of the SiO targets
• Identifying star clusters in a field: A comparison of different algorithms
• Automated search for star clusters in large multiband surveys: II. Discovery and investigation of open clusters in the Galactic plane
• Near-infrared spectra of Galactic stellar clusters detected on Spitzer/GLIMPSE images
• High Spectral Resolution Observations of the Massive Stars in the Galactic Center
• Milky Way Demographics with the VVV Survey II. Color Transformations and Near-Infrared Photometry for 136 Million Stars in the Southern Galactic Disk
• A Second Luminous Blue Variable in the Quintuplet Cluster
• Near- and Mid-Infrared colors of evolved stars in the Galactic plane. The Q1 and Q2 parameters
• Massive stars in the Cl 1813-178 Cluster. An episode of massive star formation in the W33 complex
• ATLASGAL-selected massive clumps in the inner Galaxy IV. Millimeter hydrogen recombination lines from associated HII regions
• Discovery of new Milky Way star cluster candidates in the 2MASS point source catalog III. Follow-up observations of cluster candidates in the Galactic Center region
• Mining the UKIDSS GPS: star formation and embedded clusters
• The QUaD Galactic Plane Survey II: A Compact Source Catalog
• Discovery of new Milky Way star cluster candidates in the 2MASS point source catalog. V. Follow-up observations of the young stellar cluster candidates RCW87, [BDSB2003]164 and [DBSB2003]172
• Massive Stars in the W33 Giant Molecular Complex
• HST/NICMOS observations of the GLIMPSE9 stellar cluster
• Towards a census of the Galactic anticentre star clusters II: exploring lower overdensities
• Massive stars in the giant molecular cloud G23.3-0.3 and W41
• Near-infrared spectroscopy of candidate red supergiant stars in clusters
• Exploring GLIMPSE Bubble N107: Multiwavelength Observations and Simulations
• Multiwavelength Observations of Massive Stellar Cluster Candidates in the Galaxy
• First Extended Catalogue of Galactic Bubbles InfraRed Fluxes from WISE and Herschel Surveys
• The young stellar cluster [DBS2003] 157 associated with the H II region GAL 331.31-00.34
• M1-78: a nitrogen-rich Galactic compact HII region beyond the Perseus arm

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