SIMBAD references

2003MNRAS.342..373R - Mon. Not. R. Astron. Soc., 342, 373-382 (2003/June-3)

Continuum and spectral line observations of the OH Megamaser galaxy Arp 220.


Abstract (from CDS):

We present MERLIN observations of the continuum (both 1.6 and 5 GHz) and OH maser emission towards Arp 220. The correct spatial configuration of the various components of the galaxy is revealed. In the eastern component the masers are shown to be generally coincident with the larger-scale continuum emission; in the west, the masers and continuum do not generally arise from the same location. A velocity gradient [(0.32±0.03) km/s/pc ] is found in the eastern nuclear region on MERLIN scales; this gradient is three times smaller than that seen in H i and implies that the OH gas lies inside the H i. A re-analysis of previously presented global very long baseline interferometry data reveals a very high velocity gradient [(18.67±0.12) km/s/pc] in one component, possibly the site of a heavily obscured active galactic nucleus.

Abstract Copyright: 2003 RAS

Journal keyword(s): masers - galaxies: active - galaxies: individual: Arp 220 - radio continuum: galaxies - radio lines: galaxies

CDS comments: p.381: IRAS 17028-0014 is a misprint for 17208-0014

Simbad objects: 9

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