A high-latitude H I-cloud with optical emission

Details A high-latitude H I-cloud with optical emission A high-latitude H I-cloud with optical emission

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...120...63g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 120, no. 1, April 1983, p. 63-73.

Astronomy and Astrophysics

Astronomy

45

Centimeter Waves, Emission Spectra, Hydrogen Clouds, Light Emission, Nebulae, Radio Sources (Astronomy), Brightness Temperature, Gas Density, Interstellar Extinction, Interstellar Matter, Neutral Gases, Radial Velocity, Sky Surveys (Astronomy), Spectral Energy Distribution, Spectral Line Width

Scientific paper

A high latitude H I-cloud (l ≈ 91°, b ≈ 38°) extended over several degrees on the sky with brightness temperatures TB ≤ 20K, velocity dispersion s ≥ 1.0 km s-1 and a centre velocity vLSR ≈ -21 km s-1, has been observed with the 100 m telescope. The cloud is found to be in detailed positional agreement with a faint diffuse nebula visible on the red and the blue prints of the Palomar Observatory Sky Survey. Estimates of the extinction in the nebula from star counts indicate that the ratio of H I column density to extinction is about a factor of 10 smaller than the standard value found from UV-observations.

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