Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

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dc.creatorGanguly, Rajib
dc.creatorBrotherton, Michael S.
dc.creatorArav, Nahum
dc.creatorHeap, Sara R.
dc.creatorWisotzki, Lutz
dc.creatorAldcroft, Thomas L.
dc.creatorAlloin, Danielle
dc.creatorBehar, Ehud
dc.creatorCanalizo, Gabriela
dc.creatorCrenshaw, D. Michael
dc.creatorde Kool, Martijn
dc.creatorChambers, Kenneth
dc.creatorCecil, Gerald
dc.creatorChatzichristou, Eleni
dc.creatorEverett, John
dc.creatorGabel, Jack
dc.creatorGaskell, C. Martin
dc.creatorGalliano, Emmanuel
dc.creatorGreen, Richard F.
dc.creatorHall, Patrick B.
dc.creatorHines, Dean C.
dc.creatorJunkkarinen, Vesa T.
dc.creatorKaastra, Jelle S.
dc.creatorKaiser, Mary Elizabeth
dc.creatorKazanas, Demosthenes
dc.creatorKonigl, Arieh
dc.creatorKorista, Kirk T.
dc.creatorKriss, Gerard A.
dc.creatorLaor, Ari
dc.creatorLeighly, Karen M.
dc.creatorMathur, Smita
dc.creatorOgle, Patrick
dc.creatorProga, Daniel
dc.creatorSabra, Bassem
dc.creatorSivron, Ran
dc.creatorSnedden, Stephanie
dc.creatorTelfer, Randal
dc.creatorVestergaard, Marianne
dc.date2006-10-13
dc.date.accessioned2026-07-07T11:26:10Z
dc.date.available2026-07-07T11:26:10Z
dc.descriptionWe present low-resolution ultraviolet spectra of 14 low redshift (z<0.8) quasars observed with HST/STIS as part of a Snap project to understand the relationship between quasar outflows and luminosity. By design, all observations cover the CIV emission line. Nine of the quasars are from the Hamburg-ESO catalog, three are from the Palomar-Green catalog, and one is from the Parkes catalog. The sample contains a few interesting quasars including two broad absorption line (BAL) quasars (HE0143-3535, HE0436-2614), one quasar with a mini-BAL (HE1105-0746), and one quasar with associated narrow absorption (HE0409-5004). These BAL quasars are among the brightest known (though not the most luminous) since they lie at z<0.8. We compare the properties of these BAL quasars to the z<0.5 Palomar-Green and z>1.4 Large Bright Quasar samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ~ L^0.62 relation derived by Laor & Brandt (2002). Another quasar, HE0441-2826, contains extremely weak emission lines and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud, but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG1407+265, SDSSJ1136+0242, and PKS1004+13 for which several possible explanations have been entertained.
dc.descriptionUses aastex.cls, 21 pages in preprint mode, including 6 figures and 2 tables; accepted for publication in The Astronomical Journal (projected vol 133)
dc.identifierhttps://arxiv.org/abs/astro-ph/0610435
dc.identifierhttp://arxiv.org/abs/astro-ph/0610435
dc.identifierAstron.J.133:479-488,2007
dc.identifierdoi:10.1086/510129
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195741
dc.subjectAstrophysics
dc.titleHubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars
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