A high-velocity H I stream interacting with the galactic disc

Details A high-velocity H I stream interacting with the galactic disc A high-velocity H I stream interacting with the galactic disc

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.196..835c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 196, Sept. 1981, p. 835-844.

Astronomy and Astrophysics

Astronomy

28

Flow Velocity, Galactic Structure, Gas Flow, H Lines, Hydrogen Clouds, Emission Spectra, Gas Density, Neutral Gases, Spectral Line Width

Scientific paper

New measurements of the HVC stream, discovered by van Kuilenberg (1972) near 1 = 160 deg, b = -50 deg, and V = -110 km/s, are presented. The measurements were made with an MK II telescope between 1974 and 1977. Details of the observations, which have an angular resolution of 0.55 deg, a velocity resolution of 7.3 km/s, and an rms noise of approximately 25 mK, are discussed and include the following: The -110 km/s stream is at least 25 deg long, and is coincident with a filament in the local H I gas at a velocity of -10 km/s. It is suggested that the -110 km/s stream is colliding with the galactic H I disk, and that the -10 km/s filament is shocked galactic gas. The distance from the sun is estimated to be between 100 and 300 pc.

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