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A survey of the Galactic plane for 6.7-GHz methanol masers .1. l=325 degrees-335 degrees; b=-0 degrees.53-0 degrees.53

Citation

Ellingsen, SP and Von Bibra, ML and McCulloch, PM and Norris, RP and Deshpande, AA and Phillips, CJ, A survey of the Galactic plane for 6.7-GHz methanol masers .1. l=325 degrees-335 degrees; b=-0 degrees.53-0 degrees.53, Monthly Notices of the Royal Astronomical Society, 280, (2) pp. 378-396. ISSN 0035-8711 (1996) [Refereed Article]

DOI: doi:10.1093/mnras/280.2.378

Abstract

We report the results of the first complete survey of an area of the Galactic plane for maser emission from the 6.7-GHz 51 → 60 A+ transition of CH3OH. The survey covers a 10.6-deg2 region of the Galactic plane in the longitude range 325°-335° and latitude range -0°.53-0°.53. The survey is sensitive to masers with a peak flux density greater than ∼ 2.6 Jy. The weakest maser detected has a peak flux density of 2.3 Jy, and the strongest a peak flux density of 425 Jy. We detected a total of 50 distinct masers, 26 of which are new detections. We show that many 6.7-GHz CH3OH masers are not associated with IRAS sources, and that some are associated with sources that have colours differing from those of a typical ultracompact H II (UCH II) region. We estimate that the number of UCH II regions in the Galaxy is significantly more than suggested by IRAS-based estimates, possibly by more than a factor of 2.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Ellingsen, SP (Professor Simon Ellingsen)
Author:Von Bibra, ML (Mr Mark Leopold Von Bibra)
Author:McCulloch, PM (Professor Peter McCulloch)
Author:Phillips, CJ (Dr Christopher Phillips)
ID Code:17
Year Published:1996
Web of Science® Times Cited:77
Deposited By:Physics
Deposited On:1996-08-01
Last Modified:2011-08-15
Downloads:0

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