On the possibility of radioastronomical investigation of the birth of galaxies

Details On the possibility of radioastronomical investigation of the birth of galaxies On the possibility of radioastronomical investigation of the birth of galaxies

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.171..375s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 171, May 1975, p. 375-379.

Astronomy and Astrophysics

Astronomy

50

Galactic Evolution, Hydrogen Clouds, Microwave Emission, Radio Astronomy, Astronomical Models, Cosmology, Galactic Clusters, Helium, Line Spectra, Red Shift, Superhigh Frequencies

Scientific paper

During the prestellar epoch, protogalaxies were composed mainly of neutral hydrogen with mass approximately 100 times the mass of interstellar gas in galaxies today. Protogalaxies and protoclusters of galaxies therefore radiated strongly in the 21-cm line of neutral hydrogen. Due to cosmological redshift this line will be shifted to the meter wavelength band, so detection of red-shifted 21-cm lines from protogalaxies may provide the possibility of finding the epoch of galaxy formation and the properties of protogalaxies.

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