H I-high velocity features in Draco and their X-ray counterparts

Details H I-high velocity features in Draco and their X-ray counterparts H I-high velocity features in Draco and their X-ray counterparts

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...153..249h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 153, no. 1, Dec. 1985, p. 249-252.

Astronomy and Astrophysics

Astronomy

34

Gas Dynamics, Hydrogen Clouds, Nebulae, Neutral Gases, X Ray Astronomy, Bremsstrahlung, Carbon Monoxide, Density Distribution, Temperature Distribution

Scientific paper

High negative velocity clouds (VLSR < -100 km s-1) of neutral atomic hydrogen (HVC) are found in close positional coincidence with enhancements in the soft X-ray SAS-3 and HEAO-1 satellite and the Wisconsin rocket surveys. The authors propose that the soft X-rays are caused by conversion of the collective motion of the HVCs into thermal energy during a deceleration process in the galactic gas. The X-ray count rates indicate a heating of the gas to about 106K. In the case of the HVC in the Draco Nebula a density of few times 10-2cm-3 is required to explain the X-ray emission observed. In the light of this proposal the spur like appearance of HVCs can be explained.

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