1240-057 - Giant jet or colliding galaxies?

Details 1240-057 - Giant jet or colliding galaxies? 1240-057 - Giant jet or colliding galaxies?

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96...24r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Jan. 1984, p. 24-27.

Astronomy and Astrophysics

Astronomy

1

Galactic Nuclei, Galactic Radiation, Plasma Jets, Spiral Galaxies, Astronomical Photometry, Astronomical Spectroscopy, Compact Galaxies, H Alpha Line, Nonthermal Radiation

Scientific paper

At first glance the object 1240-057, discovered on a KPNO 4-m prime focus plate, appears to be a compact galaxy with a prominent jet emanating from its nucleus. However, the color indices of the jet-like object are not consistent with nonthermal (synchrotron) radiation, but are consistent with those of a spiral galaxy. The system is shown to be an interacting S0-spiral pair. The nucleus of the S0 galaxy shows strong H-alpha and N II forbidden line emission lines, with a high forbidden line N II/H-alpha ratio, indicating either shock ionization or photoionization by a nonstellar source. The object is of interest as a moderately active nucleus clearly triggered by galaxy-galaxy interaction.

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