A Global View on Star Formation: The GLOSTAR Galactic Plane Survey V. 6.7 GHz Methanol Maser Catalogue

Abstract

Class II methanol (CH${}_3$OH) masers are amongst the clearest signposts of recent high-mass star formation (HMSF). A complete catalogue outlines the distribution of star formation in the Galaxy, the number of young star-forming cores, and the physical conditions of their environment. The Global View on Star Formation (GLOSTAR) survey, which is a blind survey in the radio regime of 4$-$8 GHz, maps the Galactic mid-plane in the radio continuum, 6.7 GHz methanol line, the 4.8 GHz formaldehyde line, and several radio recombination lines. We present the analysis of the observations of the 6.7 GHz CH${}_3$OH maser transition using data from the D-configuration of the Very Large Array (VLA). We analyse the data covering Galactic longitudes from $-2^{\circ }<l<60^{\circ }$ and Galactic latitudes of $|\text{b}|<1^{\circ }$. We detect a total of 554 methanol masers, out of which 84 are new, and catalogue their positions, velocity components, and integrated fluxes. With a typical noise level of $\sim$18 mJy beam${}^{-1}$, this is the most sensitive unbiased methanol survey for methanol masers to date. We search for dust continuum and radio continuum associations, and find that 97% of the sources are associated with dust, and 12% are associated with radio continuum emission.

Accepted in A&A July 18, 2022

References in corpus (25)

• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• ATLASGAL --- properties of a complete sample of Galactic clumps
• Kinematic Distances to Molecular Clouds identified in the Galactic Ring Survey
• The 6-GHz Multibeam Maser Survey I. Techniques
• The SEDIGISM survey: first data release and overview of the Galactic structure
• The Arecibo Methanol Maser Galactic Plane Survey--I: Data
• Accurate water maser positions from HOPS
• On the Relationship of UC H II Regions and Class II Methanol Masers: I. Source Catalogs
• A global view on star formation: The GLOSTAR Galactic Plane Survey. I. Overview and first results for the Galactic longitude range 28° < l < 36°
• Online Database of Class I Methanol Masers
• The almost ubiquitous association of 6.7 GHz methanol masers with dust
• A GLIMPSE-based search for 6.7-GHz Methanol Masers and the lifetime of their spectral features
• GLOSTAR -- Radio Source Catalog I: $28^{\circ }<\text{l}<36^{\circ }$ and $|b|<1^{\circ }$
• A global view on star formation: The GLOSTAR Galactic plane survey. II. Supernova Remnants in the first quadrant of the Milky Way
• A 6.7 GHz Methanol Maser Survey II. Low Galactic Latitudes
• A population of hypercompact HII regions identified from young HII regions
• The environment of the strongest galactic methanol maser
• A global view on star formation: The GLOSTAR Galactic plane survey III. 6.7 GHz methanol maser survey in Cygnus X
• A general catalogue of 6.7GHz methanol masers II: statistical analysis
• Detection of 6.7 GHz methanol absorption towards hot corinos
• 6.7 GHz methanol absorption toward the Seyfert 2 galaxy NGC 3079
• A 6.7 GHz methanol maser survey of the central molecular zone
• ATLASGAL -- Relationship between dense star forming clumps and interstellar masers
• Probing the early phases of high mass star formation with 6.7 GHz methanol masers
• Redshifted methanol absorption tracing infall motions of high-mass star formation regions

Cited by in corpus (13)

• A global view on star formation: The GLOSTAR Galactic plane survey VIII. Formaldehyde absorption in Cygnus~X
• A global view on star formation: The GLOSTAR Galactic plane survey. IX. Radio Source Catalog III: 2<l<28, 36<l<40, 56<l<60 and |b|<1, VLA B-configuration
• A global view on star formation: The GLOSTAR Galactic plane survey X. Galactic HII region catalog using radio recombination lines
• ATLASGAL: 3-mm class I methanol masers in high-mass star formation regions
• On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way
• SCOTCH -- Search for Clandestine Optically Thick Compact HIIs
• Discovery of non-metastable ammonia masers in Sagittarius B2
• Dynamic Massive Star Formation: Radio Flux Variability in UCHII Regions
• Discovery of widespread non-metastable ammonia masers in the Milky Way
• MeerKAT and ALMA view of the AGAL045.804-0.356 clump
• Metrewave Galactic Plane with the uGMRT (MeGaPluG) Survey: Lessons from the Pilot Study
• A global view on star formation: The GLOSTAR Galactic plane survey XII. Effelsberg's continuum view and data release
• Properties of Contracting Massive Protostellar Cores