Markarian 490 - A high-ionization starburst galaxy

Details Markarian 490 - A high-ionization starburst galaxy Markarian 490 - A high-ionization starburst galaxy

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..629d&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, July 1986, p. 629-634.

Astronomy and Astrophysics

Astronomy

8

Galactic Nuclei, Galactic Structure, Line Spectra, Photoionization, Starburst Galaxies, Balmer Series, Cassegrain Antennas, Early Stars, Emission Spectra, H Alpha Line, H Beta Line, H Ii Regions, Ionizing Radiation, Phased Arrays

Scientific paper

Spectra of the galaxy Mrk 490 are described. Three components of this object may be recognized: (1) the nucleus of the galaxy; (2) probably a luminous H II region complex close to it; and (3) either a more distant H II region or the nucleus of a smaller galaxy physically related to (1). All have high-ionization emission-line spectra indicating photoionization by early-type stars. Component (3) has especially high ionization and large equivalent width of H-beta, indicating a population unusually rich in very hot stars.

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