On the possible interaction of two gas systems in the galaxy NGC 1275 - Spectrophotometric data

Details On the possible interaction of two gas systems in the galaxy NGC 1275 - Spectrophotometric data On the possible interaction of two gas systems in the galaxy NGC 1275 - Spectrophotometric data

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980afz....16..405a&link_type=abstract

(Astrofizika, vol. 16, July-Sept. 1980, p. 405-417.) Astrophysics, vol. 16, no. 3, Jan. 1981, p. 239-248. Translation.

Astronomy and Astrophysics

Astrophysics

5

Astronomical Photometry, Astronomical Spectroscopy, Elliptical Galaxies, Galactic Nuclei, Galactic Structure, Interstellar Gas, Brightness, Emission Spectra, Forbidden Bands, H Beta Line, Nebulae

Scientific paper

Data are obtained on the brightness and relative intensities of the forbidden O II line at 3727 A, the H-beta line, the forbidden O III line at 5007 A, the H-alpha line, and the forbidden N II line at 6583 A in the emission spectrum of two gas systems in the central region of NGC 1275. The spectral observations are made with an image tube spectrograph at the direct focus of the 6-m telescope. Interesting physical conditions are found in the neighborhood of two details: a knot 3-arcsec to the northwest and a detail 7-arcsec to the northeast of the center of NGC 1275. Bright low-velocity gas is observed near the first detail and bright high-velocity gas near the second. It is noted that the entire region is characterized by a high temperature and/or degree of ionization of the gas clouds of both the gas systems discovered by Minkowski. In this region, a gas stream having velocities of several thousand km/sec has already been found. The data are thought to suggest that there are two systems of gas which interact in this region of NGC 1275.

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