Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724510f&link_type=abstract
American Astronomical Society, AAS Meeting #217, #245.10; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Arecibo single-dish spectra of Arp220 taken in 2003 revealed complex emission and absorption features in the OH satellite lines at 1612 and 1720 MHz. From these spectra, two velocity ranges are found where these lines are conjugate, while in a third both lines are in emission, with both being seen in absorption in a fourth. For a fuller understanding of the physical conditions leading to such behaviour in this prototype ULIRG, the precise locations and structures of these individual features need to be know in order that detailed comparison can be made with existing high-resolution line and continuum studies of the object. Accordingly, VLBI observations with the EVN (including the Arecibo telescope) were taken of both satellite lines, and have recently been imaged. In this poster, we will present these images and the results and conclusions derived from them.
Felli Derek
Ghosh Tamal
Momjian Emmanuel
Salter Christopher J.
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