EUVE Pointed Observations of the beta Canis Majoris Interstellar Tunnel

Details EUVE Pointed Observations of the beta Canis Majoris Interstellar Tunnel EUVE Pointed Observations of the beta Canis Majoris Interstellar Tunnel

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasp..110..827w&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 110, Issue 749, pp. 827-830.

Astronomy and Astrophysics

Astronomy

2

Ism: Bubbles, Ism: General

Scientific paper

We present results from extended pointings of the EUVE scanner telescopes in the direction of the rarefied interstellar tunnel toward the star beta CMa. Five sources were detected, each of which subsequently proved to be caused by ultraviolet leaks in the EUVE short-wavelength filters. Our initial expectation was to detect many new EUV sources in the 80 deg^2 region of very low neutral interstellar hydrogen column density covered by these extended pointings. However, no EUV sources were detected. This result is consistent with a source of short-wavelength EUV opacity, providing indirect evidence for the presence of highly ionized (coronal) gas at distances of more than 5 pc in the line of sight toward this region of anomalous interstellar absorption.

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