FUSE Observations of the HD Molecule toward HD 73882

Abstract

The Lyman and Werner band systems of deuterated molecular hydrogen (HD) occur in the far UV range below 1200 A. The high sensitivity of the FUSE mission can give access, at moderate resolution, to hot stars shining through translucent clouds, in the hope of observing molecular cores in which deuterium is essentially in the form of HD. Thus, the measurement of the HD/H2 ratio may become a new powerful tool to evaluate the deuterium abundance, D/H, in the interstellar medium. We report here on the detection of HD toward the high extinction star HD 73882 [E(B-V)=0.72]. A preliminary analysis is presented.

4 pages + 4 .ps figures. This paper will appear in a special issue of Astrophysical Journal Letters devoted to the first scientific results from the FUSE mission

References in corpus (5)

• Overview of the Far Ultraviolet Spectroscopic Explorer Mission
• Big-bang Nucleosynthesis Enters the Precision Era
• Spatial Variability in the Ratio of Interstellar Atomic Deuterium to Hydrogen. I. Observations toward delta Orionis by the Interstellar Medium Absorption Profile Spectrograph
• FUSE Observations of Molecular Hydrogen in Translucent Interstellar Clouds: The Line of Sight Toward HD 73882
• Deuterium abundances

Cited by in corpus (16)

• Overview of the Far Ultraviolet Spectroscopic Explorer Mission
• Inferring physical conditions in interstellar clouds of H_2
• FUSE Observations of Molecular Hydrogen in Translucent Interstellar Clouds: The Line of Sight Toward HD 73882
• FUSE Observations of Molecular Hydrogen in Translucent Interstellar Clouds: II. The Line of Sight Toward HD 110432
• Deuterated molecular hydrogen in the Galactic ISM. New observations along seven translucent sightlines
• HD/H2 Molecular Clouds in the Early Universe: The Problem of Primordial Deuterium
• HST/STIS Lyman-alpha observations of the quiet M dwarf GJ436: Predictions for the exospheric transit signature of the hot neptune GJ436b
• FUSE determination of a low deuterium abundance along an extended sight line in the Galactic disk
• Tiny-Scale Molecular Structures in the Magellanic Clouds (Part 1)
• A New FUSE Survey of Interstellar HD
• Interstellar 12C/13C from CH+ absorption lines: Results from an extended survey
• The Behavior of Selected Diffuse Interstellar Bands with Molecular Fraction in Diffuse Atomic and Molecular Clouds
• The surprising Far-UV spectrum of the polar BY Camelopardalis
• The D/H Ratio in the Interstellar Medium toward the White Dwarf PG0038+199
• FUSE observations of molecular hydrogen on the line of sight towards HD141569A
• PDRs4All XVII: Formation and excitation of HD in photodissociation regions. Application to the Orion Bar