A Review of H2CO 6cm Masers in the Galaxy

Abstract

We present a review of the field of formaldehyde (H2CO) 6cm masers in the Galaxy. Previous to our ongoing work, H2CO 6cm masers had been detected in the Galaxy only toward three regions: NGC7538 IRS1, Sgr B2, and G29.96-0.02. Current efforts by our group using the Very Large Array, Arecibo, and the Green Bank Telescope have resulted in the detection of four new H2CO 6cm maser regions. We discuss the characteristics of the known H2CO masers and the association of H2CO 6cm masers with very young regions of massive star formation. We also review the current ideas on the pumping mechanism for H2CO 6cm masers.

arXiv comment10 pages, 5 figures, IAU Symposium 242: Astrophysical Masers and their Environments

References in corpus (8)

• Probing Pre-Protosellar Cores with Formaldehyde
• Resolution of Distance Ambiguities of Inner Galaxy Massive Star Formation Regions II
• Dust and gas emission in the prototypical hot core G29.96-0.02 at sub-arcsecond resolution
• The Formaldehyde Masers in NGC 7538 and G29.96-0.02: VLBA, MERLIN, and VLA Observations
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• The Formaldehyde Masers in Sgr B2: Very Long Baseline Array and Very Large Array Observations
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Cited by in corpus (4)

• High-mass star-forming cloud G0.38+0.04 in the Galactic Center Dust Ridge contains H2CO and SiO masers
• A Search for H2CO 6cm Emission toward Young Stellar Objects III: VLA Observations
• New Maser Emission from Nonmetastable Ammonia in NGC 7538. IV. Coincident Masers in Adjacent States of Para-ammonia
• Thermal Formaldehyde Emission in NGC7538 IRS1