OH emission and absorption associated with supernovae in Arp 220

Details OH emission and absorption associated with supernovae in Arp 220 OH emission and absorption associated with supernovae in Arp 220

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..242..432l&link_type=abstract

Astrophysical Masers and their Environments, Proceedings of the International Astronomical Union, IAU Symposium, Volume 242, p.

Astronomy and Astrophysics

Astrophysics

Galaxies: Active, Infrared: Galaxies, Radio Lines: Galaxies, Masers

Scientific paper

We present parsec-resolution spectral-line VLBI data for two epochs separated by 15 months as a precise new probe of the innermost regions of the nearby Ultraluminous Infrared Galaxy (ULIRG) Arp 220. This galaxy hosts a powerful starburst, with an associated supernova (SN) rate of order 4/yr. An extensive population of compact continuum sources interpreted as radio supernovae (RSNe) and young supernova remnants (SNR) has been imaged. We show here that many of the supernova-related radio continuum point sources exhibit clear evidence of OH absorption or maser emission in the intervening gas, and as such provide us with a sampling of conditions along very narrow and specific lines of sight through the nuclear environment. The OH gas along these lines of sight exhibits velocity dispersions of up to several tens of km/sec, and that in some cases, multiple distinct concentrations of masing gas at different radial velocities can be discerned. There is evidence for variability in the OH properties on ~1yr timescales. Our results are discussed in the context of the overall OH megamaser properties of Arp 220.

Affiliated with

Also associated with

No associations

Rating

OH emission and absorption associated with supernovae in Arp 220 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with OH emission and absorption associated with supernovae in Arp 220, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and OH emission and absorption associated with supernovae in Arp 220 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-922741