On the nature of Hoag-type galaxy NGC 6028 and related objects

Details On the nature of Hoag-type galaxy NGC 6028 and related objects On the nature of Hoag-type galaxy NGC 6028 and related objects

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..448w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. 448-455.

Astronomy and Astrophysics

Astrophysics

17

Astronomical Photometry, Elliptical Galaxies, Galactic Structure, Peculiar Galaxies, Barred Galaxies, Galactic Mass, Luminosity, Mass Transfer, X Rays

Scientific paper

Surface photometry has been done on the nearest and brightest Hoag-type galaxy, NGC 6028, which is known to be a peculiar galaxy consisting of a luminous core surrounded by a faint, apparently detached ring. Most of the Hoag-type galaxies are found to have oval-shaped cores, and it is suggested that the outer rings of both NGC 6028 and Hoag-type galaxies may be formed through mechanisms related to the oval structures of the central cores. A countereffect of the ring formation relating to a possible dissolution of barred structures is discussed briefly. The accretion hypothesis for the origin of outer rings is considered, and possible interactions between the accreting gas and the hot, X-ray emitting gas around elliptical galaxies are discussed.

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