The spin temperature of HVC 131 + 1 - 200

Details The spin temperature of HVC 131 + 1 - 200 The spin temperature of HVC 131 + 1 - 200

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..233w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 1, Sept. 1991, p. 233-238.

Astronomy and Astrophysics

Astrophysics

20

Absorption Spectra, Galactic Structure, Hydrogen, Interstellar Matter, Neutral Gases, Spin Temperature, Brightness Temperature, Optical Thickness

Scientific paper

High-resolution Westerbork H I observations have been used to search for 21-cm absorption due to high-velocity clouds (HVCs) in spectra of continuum sources. Two absorption features were found in HVC 131 + 1 - 200, at the five- and three-sigma levels. The derived spin temperature is of the order of 50 K. The two continuum sources were not identified with a particular type of object and therefore could not be used to give limits on the distance to HVC 131 + 1 - 200. In another HVC field (M I, HVC 165 + 66 - 120) no observation was found.

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