High Resolution Ultraviolet Quasar Absorption Line Spectroscopy of z~1 Galaxy Group

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dc.creatorDing, Jie
dc.date2002-07-18
dc.date.accessioned2026-07-07T02:04:21Z
dc.date.available2026-07-07T02:04:21Z
dc.descriptionWe used ultraviolet spectra from HST/STIS (R=30,000), together with optical spectra from Keck/HIRES (R=45,000), to study the three MgII-selected absorption systems at z=0.9254, 0.9276, and 0.9342 toward the quasar PG 1206+459. A multi-phase gaseous structure, with low-ionization components produced in small condensations and high-ionization ones in diffuse clouds, is indicated in all three systems. Each system is likely to represent a different galaxy with absorption due to some combination of interstellar medium, coronal gas, halo gas, and high-velocity clouds. Even with the improved sensitivity of HST/COS, we will only be able to obtain high-resolution ultraviolet spectra of the brightest quasars in the sky. A larger telescope with ultraviolet coverage will enable quasar absorption line studies of hundreds of galaxies, including a wide range of galaxy types and environments at low and intermediate redshifts.
dc.description4 pages, 1 figure, to appear in "Hubble's Science Legacy: Future Optical-Ultraviolet Astronomy from Space", eds. K.R. Sembach, J.C. Blades, G.D. Illingworth, & R.C. Kennicutt, ASP Conference Series, in preparation
dc.identifierhttps://arxiv.org/abs/astro-ph/0207376
dc.identifierhttp://arxiv.org/abs/astro-ph/0207376
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4723
dc.subjectAstrophysics
dc.titleHigh Resolution Ultraviolet Quasar Absorption Line Spectroscopy of z~1 Galaxy Group
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