Genesis of a dwarf galaxy from the debris of the Antennae

Details Genesis of a dwarf galaxy from the debris of the Antennae Genesis of a dwarf galaxy from the debris of the Antennae

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...256l..19m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 256, no. 1, p. L19-L22.

Astronomy and Astrophysics

Astrophysics

161

Disk Galaxies, Dwarf Galaxies, Galactic Evolution, Intergalactic Media, Irregular Galaxies, Interacting Galaxies, Massive Stars, Star Formation

Scientific paper

We show that a dwarf irregular galaxy has formed out of the tidal remnants that were ejected to intergalactic space during an encounter of the disk galaxies NGC 4038/39 (the Antennae). The tidal dwarf consists of a chain of nebulae ionized by recently formed massive stars, which are embedded in an envelope of HI gas and low surface brightness optical emission. Since this object is at the tip of one of the tidal tails, star formation on a scale similar to star forming galaxies is taking place at about 100 kpc from the merging disks.

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