Physics
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5950r&link_type=abstract
HST Proposal ID #5950
Physics
Hst Proposal Id #5950 Quasars
Scientific paper
Observations with HST of the intrinsic EUV spectrum of the up to now unique high-redshift QSO HS 1700+6416 has opened a new window of research: Quantitative abundance studies (C N O Ne .....) in the halos of early galaxies via high- redshift metal absorption line systems (OVI to OIII, NIII- NV, CIII, IV...); measurement of shape and intensity of the ionizing UV background; first study of HeI at high redshift. In the course of the Hamburg wide angle QSO surveys and subsequent IUE observations we have recently succeeded in discovering three more unabsorbed high-redshift (z = 2.12, 2.16, 2.41) QSOs which are even brighter than HS 1700+6416 in the UV, and thus ideal targets for HST. We propose to take GHRS G140 L LSA spectra for Lambda < 1700 Angstroem and FOS high resolution spectra for LambdaLambda 1700 - 3280 Angstroem with the aim (i) to measure C, N, O, Ne abundances in several LLSs and metal line systems in order to check and extend the results of enhanced O/C and Ne/C ratios (ii) to determine the shape and intensity of the ionizing UV background, in particular as a function of redshift (iii) to measure HeI 584, 537 as well as the HeI Gunn-Peterson effect more reliably (iii) to study the LyAlpha forest in the yet unexplored range 1 <= z <= 1.7 in three lines of sight (iv) to study the EUV energy distribution of QSOs and QSO emission lines for lambda_rest >= 360 Angstroem.
No associations
LandOfFree
Spectroscopy of the Three UV Brightest Known High-Redshift Quasars 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 Spectroscopy of the Three UV Brightest Known High-Redshift Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopy of the Three UV Brightest Known High-Redshift Quasars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1171557