Temperature measurement of interplanetary-interstellar hydrogen

Details Temperature measurement of interplanetary-interstellar hydrogen Temperature measurement of interplanetary-interstellar hydrogen

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.270..156b&link_type=abstract

Nature, vol. 270, Nov. 10, 1977, p. 156-158.

Astronomy and Astrophysics

Astronomy

34

Gas Temperature, Hydrogen, Interplanetary Gas, Interstellar Gas, Astronomical Photometry, Cosmic Rays, Lyman Alpha Radiation, Solar System, Temperature Measurement, X Ray Sources

Scientific paper

Results obtained with a Ly-alpha photometer aboard the Prognoz-5 spacecraft are used to measure the temperature of interplanetary-interstellar hydrogen. A temperature of 8800 plus or minus 1000 K is determined for the temperature of the nearby interstellar medium. This value is taken to suggest strongly that the solar system is moving through the 'intercloud medium' and to confirm the validity of the hypothesis of a hot intercloud medium heated by low-energy cosmic rays or soft X-rays.

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