Search for 6 Centimeter Formaldehyde Masers in 22 Galactic Star-forming Regions

Details Search for 6 Centimeter Formaldehyde Masers in 22 Galactic Star-forming Regions Search for 6 Centimeter Formaldehyde Masers in 22 Galactic Star-forming Regions

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...452..304m&link_type=abstract

Astrophysical Journal v.452, p.304

Astronomy and Astrophysics

Astronomy

15

Ism: Individual Ngc Number: Ngc 7538, Ism: Molecules, Masers, Radio Lines: Ism

Scientific paper

A search for 6 cm H2CO (formaldehyde) masers in 22 Galactic star-forming regions has been carried out using the B configuration of the VLA. These observations have 2" angular resolution. The sensitivity ranges between 2 and 4 mJy beam-1. No new H2CO masers are detected. The paucity of these masers suggests that (1) their lifetimes are quite short, and/or (2) a narrow range of physical parameters is necessary for their formation. The known H2CO maser source NGC 7538 was also observed. The line flux of one of its two components has tripled over a 15 yr period.

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