Long-slit spectroscopy of the central regions of starburst galaxies - Henize 2-10 and Markarian 52

Details Long-slit spectroscopy of the central regions of starburst galaxies - Henize 2-10 and Markarian 52 Long-slit spectroscopy of the central regions of starburst galaxies - Henize 2-10 and Markarian 52

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1470s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, no. 5, May 1992, p. 1470-1483.

Astronomy and Astrophysics

Astronomy

29

Astronomical Spectroscopy, Markarian Galaxies, Starburst Galaxies, Brightness Distribution, Emission Spectra, Galactic Nuclei, H Alpha Line, H Ii Regions, Supernovae

Scientific paper

Long-slit spectroscopic observations have been made for the two starburst galaxies He 2-10 and Mrk 52, and the physical conditions of the starburst regions in galactic nuclei are discussed. H-alpha emission is strongly concentrated in the central 70 and 300 pc regions in He 2-10 and Mrk 52 respectively. This is evidence for nuclear starbursts in both galaxies. The H-alpha equivalent widths are 310 and 230 A for He 2-10 and Mrk 52, respectively, values comparable to those of giant and supergiant H II regions. Thus, the starburst phenomena that occurred in the two nuclei continued for a comparable time to that of the OB associations in giant and supergiant H II regions in disks. Based on forbidden S II double ratios, the electron densities of the nuclear ionized regions in both galaxies are to the order of 1000/cu cm, decreasing outward to the order of 100/cm. The filling factors are comparable to the highest values in giant and supergiant H II regions.

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