VLA Imaging of Class I Methanol Masers at 7 Millimeters with Angular Resolution approximately 0.2 Arcseconds

Details VLA Imaging of Class I Methanol Masers at 7 Millimeters with Angular Resolution approximately 0.2 Arcseconds VLA Imaging of Class I Methanol Masers at 7 Millimeters with Angular Resolution approximately 0.2 Arcseconds

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...497..800k&link_type=abstract

Astrophysical Journal v.497, p.800

Astronomy and Astrophysics

Astronomy

44

Ism: Clouds, Masers

Scientific paper

Eight class I methanol masers [DR21(OH), DR21W, OMC-2, NGC 2264, M8E, NGC 6334I(N), L379, W33Met] in the transition 70-61A+ at 44069 MHz were imaged with angular resolution ~0."2 with the VLA. 2 The images show a different distribution of maser "spots" from a simple structure of one or two spots at NGC 2264, M8E, DR21W, to a very complex structure of many spots at DR21(OH) (17 spots), OMC-2 (8 spots), NGC 6364I(N) (23 spots), L379 (11 spots), and W33Met (5 spots). Some spots are partially resolved, but the majority of them are still unresolved. The maximum brightness temperatures of the methanol (44,069 MHz) emission features at the observed sources ranges from 1.9 x 106 to 3.6 x 108 K. The velocity range varies from the minimum 0.8 km s-1 at NGC 2264 to the maximum 6.9 km s-1 at DR21(OH).

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