G191-B2B: Accurate abundances for nitrogen, silicon, and iron from GHRS observations

Details G191-B2B: Accurate abundances for nitrogen, silicon, and iron from GHRS observations G191-B2B: Accurate abundances for nitrogen, silicon, and iron from GHRS observations

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287..175v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 287, no. 1, p. 175-178

Astronomy and Astrophysics

Astronomy

19

Abundance, Extreme Ultraviolet Radiation, Hydrogen, Iron, Nitrogen, Photosphere, Silicon, Ultraviolet Astronomy, White Dwarf Stars, Exosat Satellite, Extreme Ultraviolet Explorer Satellite, Hubble Space Telescope, Iue, Rosat Mission, Spectrographs, Stellar Models

Scientific paper

We present a new abundance analysis from high resolution Goddard High Resolution Spectrograph (GHRS) spectra for 3 heavy elements showing spectral lines that are almost certainly of photospheric origin. The derived values (number abundances relative to hydrogen are 4 +/- 1.5 x 10-6 for N, 3 +/- 1.5 x 10-7 for Si, and 3 +/- 1.5 x 10-6 for Fe. These abundances are more accurate than previous values derived from IUE observations and can be used to provide constraints on the remaining and so far not unambiguously identified absorption in the EUV.

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