Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2466..605d&link_type=abstract
Star formation in galaxies, Proceedings of a conference at the California Institute of Technology, Pasadena, California, June 16
Astronomy and Astrophysics
Astronomy
Line Spectra, Near Infrared Radiation, Point Sources, Radio Emission, Stellar Spectra, Cosmic Dust, H Ii Regions, Infrared Astronomy Satellite, Radiation Absorption, Sky Surveys (Astronomy), Space Observations (From Earth), Spectrum Analysis, Star Formation, Stellar Luminosity
Scientific paper
Optical, near infrared, radio continuum and HI observations were undertaken of the galaxies identified with IRAS sources in a few fields roughly of the size of a sky survey plate. Results are presented from two fields at galactic latitude +27 and +43 deg over a total area of 100 sq. deg. These regions contained 115 IRAS point sources, out of which 26 were identified with stars and 81 with faint galaxies, 10 of which were difficult to recognize on the Schmidt plates. Spectroscopy was obtained with the ESO telescopes at a resolution of about 10 A. The vast majority of galaxies have low excitation spectra dominated by low ionization lines. The spectra are typical of HII region type galaxies, however of much lower excitation that other starbursts galaxies. The importance of the reddening as determined from the H alpha/H beta ratio is stressed: the visual absorption Av ranges from 2 to 6 magnitudes and as a consequence the corrected LIR/L sub B ratios are considerably reduced if those reddenings apply to the whole galaxy.
Bottinelli Lucette
Bouchet Patrice
Dennefeld Michel
Gouguenheim Lucienne
Karoji Hiroshi
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