Absolute positions of 6.7-GHz methanol masers

2009/08/27 by Ye Xu, Y. Xu, M. A. Voronkov +7 · 3 citations
Chemistry · Physics and Astronomy · #Astronomical interferometer #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Chemistry #Interferometry #Maser #Merlin (protein) #Molecular Spectroscopy and Structure #Optics #Parallax #Physics #Proper motion #Star (game theory) #Star formation #Stars #Stellar, planetary, and galactic studies #Very-long-baseline interferometry #Wavelength #astro-ph.GA #astro-ph.SR

paper · pdf · doi:10.1051/0004-6361/200912135

A&A accepted 29 pages, 6 figures, 5 tables

arxiv created 2009/08/27 · openalex publication_date 2009/08/27 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The ATCA, MERLIN and VLA interferometers were used to measure the absolute positions of 35 6.7-GHz methanol masers to subarcsecond or higher accuracy. Our measurements represent essential preparatory data for Very Long Baseline Interferometry, which can provide accurate parallax and proper motion determinations of the star-forming regions harboring the masers. Our data also allow associations to be established with infrared sources at different wavelengths. Our findings support the view that the 6.7 GHz masers are associated with the earliest phases of high-mass star formation.

Citations

• Molecular Counterparts of Ultracompact HiiRegions with Extended Envelopes
• AGLIMPSE-based search for 6.7-GHz methanol masers and the lifetime of their spectral features
• A Movie of a Star: Multiepoch Very Long Baseline Array Imaging of the SiO Masers toward the Mira Variable TX Cam
• The Distance to the Perseus Spiral Arm in the Milky Way
• TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. VI. GALACTIC STRUCTURE, FUNDAMENTAL PARAMETERS, AND NONCIRCULAR MOTIONS
• Millimeter Multiplicity in NGC 6334 I and I(N)
• Searching for massive pre-stellar cores through observations of N₂H+and N₂D+

Cited by

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• A SEARCH FOR INFALL EVIDENCE IN EGOs. I. THE NORTHERN SAMPLE
• DISTANCE AND PROPER MOTION MEASUREMENT OF WATER MASERS IN SHARPLESS 269 IRS 2w

Related

• VLBI observations of 12 GHz methanol masers
• Distances to Galactic methanol masers
• Milliarcsecond structure of methanol masers in L1206 and GL2789
• Compact vs. Scattered: Suitability of Southern 6.7GHz Methanol Masers for VLBI astrometry
• Discovery of two new methanol masers in NGC 7538