Computer Science
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7221h&link_type=abstract
HST Proposal ID #7221
Computer Science
Hst Proposal Id #7221 Quasar Absorption Lines
Scientific paper
We propose using HST and the coronagraphic mode of NICMOS to detect emission from the galaxies or proto-galaxies which cause the damped Lyman-alpha absorption line systems in the spectra of quasars. The sample of three quasars has been selected so that we may obtain not only a deep continuum image in filter F160W, but also line-emission images in narrow-band filters which correspond to H-alpha at the redshift of the absorber, F187N or F190N {and in one instance [OII] 3727 in F108N}. H-alpha emission would confirm any detection of the absorber and may also provide a redshift for any companions of the absorber system. The broad-band exposures are selected to detect a galaxy with luminosity of 0.2 H* at the absorber redshift or 0.5 H* at the quasar redshift. Some of the exposures are taken outside the coronagraph aperture to get a good profile of the quasar and to sample the region covered by the occulting mask. The narrow-band exposures are selected to detect an H-alpha flux corresponding to 5-10 solar masses per year of star formation in an absorber galaxy. In addition to the images taken with the primary camera 2, coordinated parallel images will also be obtained with cameras 1 and 3, using narrow and broad band filters. Even though the parallel images in camera 3 might be out of focus, they will be useful after deconvolution to search for companions in adjacent fields at the same redshift as the absorber. Keywords: galaxies, quasars, quasar absorption lines
No associations
LandOfFree
Imaging of Quasar Absorber 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 Imaging of Quasar Absorber Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging of Quasar Absorber Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-895214