Detection of class I methanol (CH{sub 3}OH) maser candidates in supernova remnants

Journal Article · Tue Apr 01 00:00:00 EDT 2014 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/147/4/73· OSTI ID:22340318

Pihlström, Y. M.; Mesler, R. A.; McEwen, B. C. ^[1]; Sjouwerman, L. O.; Frail, D. A.

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1. Department of Physics and Astronomy, University of New Mexico, MSC07 4220, Albuquerque, NM 87131 (United States)

We have used the Karl G. Jansky Very Large Array to search for 36 GHz and 44 GHz methanol (CH{sub 3}OH) lines in a sample of 21 Galactic supernova remnants (SNRs). Mainly the regions of the SNRs with 1720 MHz OH masers were observed. Despite the limited spatial extent covered in our search, methanol masers were detected in both G1.4–0.1 and W28. Additional masers were found in Sgr A East. More than 40 masers were found in G1.4–0.1, which we deduce are due to interactions between the SNR and at least two separate molecular clouds. The six masers in W28 are associated with the molecular cloud that is also associated with the OH maser excitation. We discuss the possibility that the methanol maser may be more numerous in SNRs than the OH maser, but harder to detect due to observational constraints.

• OSTI ID: 22340318
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 147, Issue 4; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DETECTION
EXCITATION
GALAXIES
GHZ RANGE
INTERACTIONS
LIMITING VALUES
MASERS
METHANOL
MHZ RANGE
SUPERNOVA REMNANTS
SUPERNOVAE