Physics
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7595j&link_type=abstract
HST Proposal ID #7595
Physics
Hst Proposal Id #7595 Quasar Absorption Lines
Scientific paper
Damped Lyman-alpha absorption systems in quasar spectra have the potential of revealing the abundance ratio of deuterium to hydrogen in gas systems that are not as chemically evolved as our Galaxy. This program will record the high Lyman series lines of two such systems in the coverage of the STIS near-uv band, where the interference from randomly situated Lyman-alpha forest lines is much lower than at visible wavelengths. Ground-based observations of metal lines indicate that the system at z{abs} = 1.3725 in 0935+4143 has a velocity dispersion b = 12 km/s, while the z{abs} = 1.6616 system has b = 16 km/s. Both of these b values are ideal for determining D/H. A secondary objective of this program is to observe various atomic lines shortward of Lyman-alpha in these systems {such as absorption from the O VI doublet arising from very hot gas}, and we also seek to register absorption features from the Lyman and Werner bands of molecular hydrogen if the molecular abundances are high enough to make them visible.
No associations
LandOfFree
D/h in Quasar Absorption Line Systems 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 D/h in Quasar Absorption Line Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and D/h in Quasar Absorption Line Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-896006