High-dispersion spectroscopy of the clumpy irregular galaxies Markarian 297 and 325

Details High-dispersion spectroscopy of the clumpy irregular galaxies Markarian 297 and 325 High-dispersion spectroscopy of the clumpy irregular galaxies Markarian 297 and 325

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181..265t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 2, July 1987, p. 265-269.

Astronomy and Astrophysics

Astrophysics

10

Galactic Radiation, High Dispersion Spectrographs, Irregular Galaxies, Starburst Galaxies, Clumps, Data Sampling, Emission Spectra, H Alpha Line, Hydrogen Clouds, Velocity Distribution

Scientific paper

High-dispersion spectroscopic observations (0.3 - 0.6 Å resolution) have been made of four clumps of the two clumpy irregular galaxies Markarian 297 and 325. Their velocity dispersions in the Hα emission line (32 - 41 km s-1) are twice or more as large as those of the so-called giant H II regions in nearby spiral or irregular galaxies. The resultant virial masses of the clumps are estimated as the order of 108M_sun;. Two clumps of the sample (Markarian 297-B and Markarian 325-B) show a redward excess emission which may be explained by a composite profile rather than a single gaussian one.

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