New galactic population class

Details New galactic population class New galactic population class

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.260..412s&link_type=abstract

Nature, vol. 260, Apr. 1, 1976, p. 412-414.

Physics

17

Density Distribution, Galactic Radiation, Gamma Rays, Hydrogen Clouds, Spiral Galaxies, Star Distribution, Cosmic Rays, Galactic Structure, Gas Density, Hydrogen Atoms, Interstellar Gas, Radial Distribution, Supernova Remnants

Scientific paper

It has been found that galactic gamma rays come from regions in which molecular hydrogen is dense and in which 'population I' objects are predominantly found. An interpretation of the existence of such regions leads to a proposal for a change in the Baade classification scheme. 'Population I' is to include all the objects associated with the H2 clouds. A new class, 'population 0' is to refer to the regions, relatively richer in atomic hydrogen, which lie further from the galactic center.

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