Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...251..431v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 251, no. 2, Nov. 1991, p. 431-441. Research supported by ASTRON.
Astronomy and Astrophysics
Astronomy
7
Carbon Monoxide, Infrared Astronomy Satellite, Interstellar Matter, Line Spectra, Mass To Light Ratios, Star Formation, Far Infrared Radiation, Galactic Mass, Radio Spectra, Spectral Line Width
Scientific paper
Results of CO(J = 1-0) line observations made of 19 extreme IRAS galaxies are presented. The detected galaxies have L(FIR) of about 7 x 10 exp 9-10 solar luminosities and L(FIR)/M(H2) ratios of 6-30 solar luminosities/solar mass. Of the dwarfs, barred spirals, and interacting or merging systems under consideration, the dwarfs have L(FIR)/M(H2) ratios similar to the other subclasses, although they have the lowest average L(FIR). The barred spirals show a large spread in the L(FIR) and L(FIR)/M(H2). On average, the interacting or merger systems have the highest L(FIR). The extreme IRAS galaxies contain an ample global gas supply to sustain the ongoing starbursts. A gas-to-dust mass ratio is estimated for the present extreme IRAS galaxies which is similar to the Galactic value. Total blue mass-to-light ratios are estimated for these galaxies from the CO line widths which are comparable to those of normal spirals.
Driel Wim van
van den Broek A. C.
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