High Resolution Echelle FUV Spectroscopy of the Low Redshift Gas toward the QSO PKS 0312-77

Details High Resolution Echelle FUV Spectroscopy of the Low Redshift Gas toward the QSO PKS 0312-77 High Resolution Echelle FUV Spectroscopy of the Low Redshift Gas toward the QSO PKS 0312-77

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.7909l&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #79.09; Bulletin of the American Astronomical Society, Vol. 34, p.1235

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We present high resolution FUV echelle spectroscopy of several low z absorbers (z < 0.22) in the spectra of the QSO PKS 0312-77. The data were obtained with the Space Telescope Imaging Spectrograph (E140M, E230M) at a resolution of 45,000. We find a H I complex at z = 0.202, and associated with one of the H I components, several ions, including highly ionized species (O VI, N V, Si IV) and weakly ionized species (Si II, S III, C II, N II). Another strong H I absorber complex lies 900 km/s to the blue with also an O VI detection. These absorbers are only separated by 5000-6000 km/s from the QSO, and are likely associated with it or its host cluster. The z=0.202 complex possibly produces Lyman limit absorption. We also find a H I complex at z = 0.159, with O VI 350 km/s to the blue. We will discuss our results in conjunction with (i) the WFPC2 F702W images taken in this field suggesting a local galaxy overdensity of 2 at 2.3 sigma significance within 30-50'' from the QSO, and (ii) with a multislit galaxy survey around PKS 0312-77 (with the Las Campanas Observatory) to cross-correlate galaxies and absorbers for halo and intracluster gas studies .

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