2013/12/18 by Shari Breen, S. L. Breen, Simon Ellingsen +13
Chemistry · Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Astrophysics and Star Formation Studies #Chemistry #Galaxy #Gamma-ray bursts and supernovae #Latitude #Longitude #Luminosity #Maser #Methanol #Physics #astro-ph.GA
paper · pdf · doi:10.1093/mnras/stt2447
MNRAS accepted
arxiv created 2013/12/18 · openalex publication_date 2014/01/17 · arxiv updated 2015/06/18 · openalex created_date 2016/08/23 · openalex updated_date 2026/08/05
We present the third instalment of a series of catalogues presenting 12.2-GHz methanol maser observations made towards each of the 6.7-GHz methanol masers detected in the Methanol Multibeam (MMB) Survey. The current portion of the catalogue includes the Galactic longitude region 10° to 20°, where we detect 47 12.2-GHz methanol masers towards 99 6.7-GHz targets. We compare the occurrence of 12.2-GHz methanol masers with water maser emission, for which all 6.7-GHz methanol masers in the 6° to 20° longitude range have now been searched. We suggest that the water masers follow a more complicated evolutionary scenario than has been found for the methanol and OH masers, likely due to their different pumping mechanisms. Comparisons of the 6.7-GHz methanol to OH maser peak flux density ratio and the luminosity of the associated 12.2-GHz sources suggests that the 12.2-GHz maser luminosity begins to decline around the time that an OH maser becomes detectable.