Observations of low redshift H I in Stephan's Quintet

Details Observations of low redshift H I in Stephan's Quintet Observations of low redshift H I in Stephan's Quintet

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..267s&link_type=abstract

Astronomical Journal, vol. 88, Mar. 1983, p. 267-271.

Astronomy and Astrophysics

Astronomy

10

Astronomical Spectroscopy, Galaxies, Hydrogen Clouds, Red Shift, Astronomical Maps, Neutral Gases, Spectral Resolution, Visible Spectrum

Scientific paper

Neutral hydrogen measures that cover the velocity range from V = 200 to 2200 km/s are reported for Stephan's Quintet and its immediate vicinity. All measures were obtained using a new very sensitive cooled GaAsFet receiver and the 305-m reflector at Arecibo. The observations indicate the existence of low redshift H I which is significantly displaced from the position of the low redshift optical component of the Quintet, NGC 7320. Analysis of previous measures of the Sd galaxy NGC 7320 show that it is strongly H I deficient for its type and also deficient in the fraction of its mass in the form of H I. Both results could be attributed to removal of H I from NGC 7320 by interaction, possibly with the high redshift members of the Quintet. This possibility justifies remeasurement of the H I around NGC 7320 with the highest sensitivity and resolution available.

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