H I observations of the elliptical galaxies NGC 2974 and NGC 5018

Details H I observations of the elliptical galaxies NGC 2974 and NGC 5018 H I observations of the elliptical galaxies NGC 2974 and NGC 5018

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330..684k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 15, 1988, p. 684-694.

Astronomy and Astrophysics

Astronomy

61

Elliptical Galaxies, Extragalactic Radio Sources, H Lines, Infrared Sources (Astronomy), Interstellar Gas, Astronomical Maps, Very Large Array (Vla)

Scientific paper

Two ellipticals, NGC 2974 and NGC 5018, selected because of their relatively strong infrared fluxes, were detected in H I in VLA 21 cm observations. NGC 2974 has a regular distribution of gas. The H I appears to be in a rotating disk with the rotation axis well aligned with the optical minor axis of the galaxy. In contrast, NGC 5018 contains little hydrogen, which may be flowing into it from the nearby spiral NGC 5022. The H I distribution of NGC 5022 is distorted toward NGC 5018. Three other H I features in the field of NGC 5018/5022 are probably gas-rich dwarfs which may have played some part in the acquisition of gas by the elliptical galaxy. The radio continuum map at 21 cm shows two sources near NGC 5018, one at its center and another about one arcmin away.

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