Other
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.4904o&link_type=abstract
American Astronomical Society Meeting 208, #49.04; Bulletin of the American Astronomical Society, Vol. 38, p.124
Other
Scientific paper
We present interstellar column density measurements of several atomic and molecular species along the lines of sight to the central stars of planetary nebulae (CSPN) WD0436+466 and LSS1362. Sightlines to CSPN are interesting because the gas in the vicinity of the central star is expected to be heavily astrated.Both sightlines presented here probe gas in the galactic disc, of up to 200 pc for WD0439+466 and up to 1000 pc for LSS1362. The analyses of FUSE and STIS data, providing a total wavelength coverage from 912 to 1735 A, allow us to determine the column densities of H I, D I, C I, N I, O I, Fe II, H_2, HD, etc. Both sightlines have log N(H I) > 20, probing a regime where the interstellar D/H ratio has been seen to vary by a factor of 4.We derive D/H, N/H, O/H, and D/O ratios which are then compared to values for other sightlines published in the literature.This work is based on data obtained for the Guaranteed Time Team by the NASA-CNES-CSA FUSE mission operated by The Johns Hopkins University. Financial support to U. S. participants has been provided in part by NASA contract NAS5-32985 to Johns Hopkins University.
Chayer Pierre
Kruk Jeff W.
Moos Warren H.
Oliveira Cristina M.
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