The unusual X-ray collision morphology of NGC 4782/4783 (3C 278).

Details The unusual X-ray collision morphology of NGC 4782/4783 (3C 278). The unusual X-ray collision morphology of NGC 4782/4783 (3C 278).

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..427b&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 427 - 428

Astronomy and Astrophysics

Astrophysics

Elliptical Galaxies: Collisions, Elliptical Galaxies: X Rays, Elliptical Galaxies: Radio Jets, Elliptical Galaxies: Tidal Effects, Elliptical Galaxies: Galaxy Pairs, Galaxy Pairs: X Rays, Galaxy Pairs: Interstellar Matter

Scientific paper

Deep ROSAT HRI imaging of the X-ray emitting gas associated with the colliding elliptical galaxy pair NGC 4782/4783 reveals for the first time the complexity of the hot gas distribution in a pair of close interacting ellipticals. The HRI image shows hot gas around each galaxy, a high-surface brightness X-ray bridge connecting the galaxy pair, tidal-like tails emerging from the two galaxies, and a sheet of gas at the interaction interface between the two galaxies. The hot gas distributions do not peak at the optical centers of the galaxies, but are displaced in the same sense as the tidal distensions seen in the optical luminosity distributions. All of these remarkable features show the complexity of structure that develops in the hot gas distribution when both hydrodynamical and tidal forces come into play during collisions between ellipticals with hot gas components. These results also substantiate the major role played by the hot ISM, and its asymmetries, in the propagation and entrainment of radio jets in colliding radio host ellipticals.

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