The Im/dE,N mixed morphology dwarf ESO 359-G29 as a probe of a massive halo in NGC 1532

Details The Im/dE,N mixed morphology dwarf ESO 359-G29 as a probe of a massive halo in NGC 1532 The Im/dE,N mixed morphology dwarf ESO 359-G29 as a probe of a massive halo in NGC 1532

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407...14s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 1, p. 14-21.

Astronomy and Astrophysics

Astrophysics

16

Dwarf Galaxies, Galactic Halos, Galactic Structure, Dark Matter, Galactic Mass, H I Regions, Mass To Light Ratios

Scientific paper

Red and yellow images were made to determine the properties of ESO 359-G29. The optical morphology of ESO 359-G29 in the yellow and red is that of a nucleated dwarf E or dS0 galaxy, similar to those found in Virgo, Fornax, and Coma Clusters, in the rich and sparse groups, and as companions to single massive parents. The optical morphology in the blue shows a small rate of recent star formation. The H I content of ESO 359-G29 is normal in all comparisons with the unbiased distance-limited sample of Virgo Cluster dwarfs. The H I emission from NGC 1532 extends 60 kpc south and 40 kpc north of the center of the galaxy and extends nearly 4 times the radius of the galaxy disk. The total H I mass is 2.7 x 10 exp 10 solar masses. The rotation curve, determined from the H I emission, extends over 10 arcmin radius from the galaxy. The juxtaposition of NGC 1532 and ESO 359-G29 shows that ESO 359-G29 lies near the minor axis of NGC 1532, about 82 kpc away.

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