Science Highlights from the ORFEUS Missions

Details Science Highlights from the ORFEUS Missions Science Highlights from the ORFEUS Missions

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.6301h&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #63.01; Bulletin of the American Astronomical Society, Vol. 30, p.910

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Berkeley and Echelle spectrographs aboard the ORFEUS telescope collected dozens of intermediate-resolution (lambda / 3000 to lambda / 10,000) far-ultraviolet spectra during the ORFEUS-SPAS I and II space shuttle missions in 1993 and 1996. A suite of papers based on ORFEUS-II data from the Berkeley spectrograph will be published in a dedicated issue of Ap. J. Letters in mid-1998. I will summarize some of these papers, whose topics range from the lunar atmosphere to intergalactic H I clouds in the Virgo cluster. I will also present the results of ongoing work, including measurements of the O VI column density along several halo sight lines and a study of absorption from high-latitude molecular hydrogen. Along the way I will try to point out the challenges posed by far-ultraviolet astrophysics (e.g., the density of spectral features and the strong modulation of stellar continua) and by the modern instrumentation used in this band.

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