Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3098..215g&link_type=abstract
In NASA, Marshall Space Flight Center, Paired and Interacting Galaxies: International Astronomical Union Colloquium No. 124 p 21
Astronomy and Astrophysics
Astronomy
Collisions, Cosmic Dust, Disk Galaxies, Elliptical Galaxies, Infrared Astronomy Satellite, Ionized Gases, Stellar Mass, Broadband, Continuums, Estimating, Signatures, Stars
Scientific paper
The authors report the discovery of a large (15 kpc diameter) H alpha + (NII) emission-line disk in the elliptical galaxy IC 1459, showing weak spiral structure. The line flux peaks strongly at the nucleus and is more concentrated than the stellar continuum. The major axis of the disk of ionized gas coincides with that of the stellar body of the galaxy. The mass of the ionized gas is estimated to be approx. 1 times 10 5 solar mass, less than 1 percent of the total mass of gas present in IC 1459. The total gas mass of 4 times 107 solar mass has been estimated from the dust mass derived from a broad-band color index image and the Infrared Astronomy Satellite (IRAS) data. The authors speculate that the presence of dust and gas in IC 1459 is a signature of a merger event.
de Jong Teije
Goudfrooij Paul
Hansen Leif
Jorgensen Henning E.
Norgaard-Nielsen Hans Ulrik
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