The double-nucleus galaxy IRAS 02580-1136 - A merging system

Details The double-nucleus galaxy IRAS 02580-1136 - A merging system The double-nucleus galaxy IRAS 02580-1136 - A merging system

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..986h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, April 1989, p. 986-994, 1252.

Astronomy and Astrophysics

Astronomy

8

Astronomical Photometry, Galactic Nuclei, Galactic Structure, Infrared Sources (Astronomy), Interacting Galaxies, Active Galactic Nuclei, Disk Galaxies, Elliptical Galaxies, Far Infrared Radiation, H Alpha Line, H Ii Regions

Scientific paper

CCD imaging, infrared photometry, and optical spectroscopy lead to the conclusion that IRAS 02580-1136 consists of two colliding galaxies and is possibly an ongoing merger. Visually, the IRAS source displays two distinct brightness concentrations. These two nuclei, referred to as A and B, have a projected linear separation of 7 kpc and a radial-velocity difference of 180 km/s. Nucleus A belongs to a bulgelike structure and has an optical spectrum typical of a Seyfert 2. It is argued that it harbors a 99 percent dust-obscured low-luminosity Seyfert I source that powers most of the far-infrared radiation. Nucleus B is either a galactic bulge or a low-luminosity elliptical with a heavily reddened compact H II region at its center.

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