Spectroscopic Observation of G191-B2B Between 200 and 340 Angstroms

Details Spectroscopic Observation of G191-B2B Between 200 and 340 Angstroms Spectroscopic Observation of G191-B2B Between 200 and 340 Angstroms

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.4401w&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #44.01; Bulletin of the American Astronomical Society, Vol. 24, p.799

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We present the first spectrum of the hot, DA white dwarf G191-B2B between 200 and 340 Angstroms . The spectrum was acquired using a sounding rocket borne EUV spectrograph launched from White Sands Missile Range on January 10, 1992 at 3:40 am GMT. The spectrum, which has ~1.5 Angstroms resolution, shows possible absorption features of ionized metals. Absorption features of HeII are remarkably absent. This observation rules out He as being the opacity source for lambda \ <= 228 Angstroms and suggests that metals provide the short wavelength opacity source in the case of G191-B2B.

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