Long-term variability in 12.2-GHz 20 -3-1 E-methanol masers and new detections towards 6.6-GHz 51 -60 A(+)-methanol masers

Details Long-term variability in 12.2-GHz 20 -3-1 E-methanol masers and new detections towards 6.6-GHz 51 -60 A(+)-methanol masers Long-term variability in 12.2-GHz 20 -3-1 E-methanol masers and new detections towards 6.6-GHz 51 -60 A(+)-methanol masers

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262..343m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 2, p. 343-349.

Astronomy and Astrophysics

Astronomy

19

Interstellar Masers, Methyl Alcohol, Star Formation, Luminosity, Radio Astronomy, Variability

Scientific paper

Five bright 12.2-GHz E-methanol masers monitored in 1987 have been reobserved four years later. During this interval, the masers varied internally by less than 15-20 percent, with the exception of single components in two sources. Fourteen star-forming regions with the brightest 6.6-GHz A(+)-methanol masers (above 100 Jy), but without known 12.2-GHz counterparts, were searched in the 12.2-GHz E-methanol transition, and 10 new masers were detected. These data support the hypothesis that 6.6-GHz A-methanol and 12.2-GHz E-methanol masers are always found together.

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