How to find galaxies at high redshift

Details How to find galaxies at high redshift How to find galaxies at high redshift

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..487h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 487-491.

Astronomy and Astrophysics

Astrophysics

46

Blue Stars, Galaxies, Interstellar Matter, Red Shift, Stellar Evolution, Ultraviolet Radiation, Hydrogen, Infrared Spectrophotometers, Light (Visible Radiation), Lyman Spectra, Molecular Clouds, Ultraviolet Spectra

Scientific paper

The UV and optical spectra presented for the blue star-forming galaxies Mrk 357, Mrk 496, and Mrk 26 have sufficiently large redshifts to make Lyman-alpha observations possible. Weak Lyman-alpha emission is observed in Mrk 357 and Mrk 469, with a flux value comparable to that of H-beta, and no detectable Lyman-alpha emission is detected in the case of Mrk 26. All three objects exhibit strong UV continuum emission, which is characteristic of hot stars, and although little evidence of dust is found, the observational constraints on extinction and neutral hydrogen column densities allow substantial reductions of the Lyman-alpha flux by dust absorption in conjunction with large line optical depths. These results imply that primeval galaxy detection calls for attention to be given to redshifted continuum emission from massive galaxies.

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