Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..464b&link_type=abstract
Astrophysical Journal, Part 1, vol. 247, July 15, 1981, p. 464-472.
Astronomy and Astrophysics
Astrophysics
94
Cooling Flows (Astrophysics), Cosmic Gases, Galactic Radiation, Galactic Structure, X Ray Sources, Brightness, Gas Density, Gas Flow, Gas Temperature, Halos, Mass, Mass Flow Rate, Radiant Cooling, Thermal Conductivity
Scientific paper
A conventional model for the mass of the galaxy M87 (500-billion solar masses) is used to show that a radiative cooling flow agrees well with spectroscopically derived mass flow rates (10 solar masses per year) and surface brightness profiles of X-ray emission around the galaxy. A temperature of 100-million K, and a density of a few x 10 to the -4th/cu cm are obtained without the use of a massive halo. The atmosphere contains 1-trillion solar masses of gas, with a temperature profile increasing outward and gas acting as a reservoir for the flow. The present models indicate that thermal conductivity in M87 is less than 0.002 of its classical value, and does not significantly affect properties of the surrounding gas.
Binney James
Cowie Lennox L.
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