Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.1205d&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #12.05; Bulletin of the American Astronomical Society, Vol. 25, p.1307
Astronomy and Astrophysics
Astronomy
Scientific paper
We present an analysis of the absorption line spectrum of the bright QSO PG 1522+101 (zem = 1.321, V = 15.65, B = 15.8). The data were obtained at a resolution of =~ 1200, using the high resolution gratings G190H and G270H of the HST FOS. The wavelength coverage of the observations is from 1590 Angstroms to 3300 Angstroms (685 Angstroms to 1413 Angstroms in the QSO rest frame). The spectrum exhibits high signal to noise (between 20 and 40) for most of the wavelength range covered. We identify 98 lines at a significance level of 4.5sigma . Most of lines detected are due to Lyman alpha forest absorption, but we also detect a significant number of intergalactic metal lines as well as interstellar Milky Way absorption. Our aim is to study the evolution of the Lyman alpha forest and metal absorption lines. Furthermore, the high galactic latitude of the QSO (b = 50deg ) makes this line of sight ideal for study of the Galactic Halo. This work is supported by NASA FOS Science Grant NAG5-1630.
Beaver Edward A.
Burbidge Margaret. E.
Cohen Ross D.
Diplas Athanassios
Junkkarinen Vesa T.
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