IUE observations of interstellar hydrogen and deuterium toward Alpha Centauri B

Details IUE observations of interstellar hydrogen and deuterium toward Alpha Centauri B IUE observations of interstellar hydrogen and deuterium toward Alpha Centauri B

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303..791l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 303, April 15, 1986, p. 791-796.

Astronomy and Astrophysics

Astronomy

27

Binary Stars, Deuterium, Hydrogen, Interstellar Matter, Iue, Ultraviolet Astronomy, Absorption Spectra, Abundance, Emission Spectra, Interstellar Extinction, Lyman Alpha Radiation

Scientific paper

A high dispersion profile is presented of the Lyman-alpha emission toward Alpha Cen B as recorded in two images taken with the IUE spacecraft. The spectra were examined with a three-parameter Gaussian or five-parameter solar-type profile to derive the intrinsic background stellar emission. Voight absorption profiles were calculated for the intervening H I and D I gas. A uniform, thermally broadened medium was assumed, with the calculations being based on the free stellar parameters of density, velocity dispersion and the bulk velocity of H I, and the density of D I. The use of a small aperture is shown to have been effective in eliminating geocoronal and interplanetary diffuse Ly-alpha contamination. The H I absorption profile toward Alpha Cen B is found to be equivalent to that toward Alpha Cen A, indicating that the H I profiles derived are essentially independent of stellar emission. Less success, however, was attained in obtaining any definitive D I profile, although an asymmetry in the blue and red wings of the Lyman-alpha emissions did show the presence of absorption by interstellar deuterium and allow setting a lower limit of 0.00001 for the D I/H I ratio.

Affiliated with

Also associated with

No associations

Rating

IUE observations of interstellar hydrogen and deuterium toward Alpha Centauri B does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with IUE observations of interstellar hydrogen and deuterium toward Alpha Centauri B, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IUE observations of interstellar hydrogen and deuterium toward Alpha Centauri B will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1101984