The nature of the megamaser galaxy IC 4553 (Arp 220)

Details The nature of the megamaser galaxy IC 4553 (Arp 220) The nature of the megamaser galaxy IC 4553 (Arp 220)

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..701n&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 1, 1985, p. 701-711.

Astronomy and Astrophysics

Astronomy

50

Astronomical Spectroscopy, Galactic Nuclei, Infrared Astronomy, Interstellar Masers, Radio Galaxies, Seyfert Galaxies, Active Galaxies, Disk Galaxies, Galactic Structure, Hydroxyl Emission, Infrared Photometry

Scientific paper

The active galaxy IC 4553 (Arp 220) is distinguished both by the intrinsic strength of its OH maser emission (greater than that of any other OH maser) and by its far-infrared excess (higher than that of any other UGC galaxy). Optical and infrared observations made with the Anglo-Australian telescope are presented, and it is shown that the galaxy may be a Seyfert galaxy appearing different from conventional Seyferts largely because of its orientation. The nucleus, which is obscured by the edge-on galactic disc, is surrounded by a stellar halo which is seen as an extended infrared source and appears optically as two components, one on each side of the disc.

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