A lower limit to the binding mass of early-type galaxies

Details A lower limit to the binding mass of early-type galaxies A lower limit to the binding mass of early-type galaxies

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221.1049f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, Aug. 15, 1986, p. 1049-1056. Research supported by

Astronomy and Astrophysics

Astronomy

56

Galactic Structure, Gravitational Effects, Interstellar Gas, Mass, Halos, High Temperature Gases, Mass To Light Ratios, Minima, Temperature Profiles

Scientific paper

A previously-determined limit on the temperature profile imposed on early galaxies by the requirements of convective stability is used to calculate minimum binding masses for young galaxies. It is shown that the mass needed to bind galaxies is minimal when temperature drops rapidly with increasing radius at the periphery, a situation that has been detected with the Einstein Observatory X-ray data. The total mass of gas in the resulting dark halo, hydrostatic equilibrium, will exceed the mass of the galaxy from which it issues. The mass is computed from the temperature/radial distance ratios. An average total binding mass of at least 5 trillion solar masses is projected for early-type galaxies, yielding a mass/luminosity ratio higher than 74.

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