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The X-ray and ultraviolet absorbing outflow in 3C 351

1994; IOP Publishing; Volume: 434; Linguagem: Inglês

10.1086/174750

1538-4357

Smita Mathur, B. J. Wilkes, M. Elvis, F. Fiore,

X-ray Spectroscopy and Fluorescence Analysis

view Abstract Citations (143) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The X-Ray and Ultraviolet Absorbing Outflow in 3C 351 Mathur, Smita ; Wilkes, Belinda ; Elvis, Martin ; Fiore, Fabrizio Abstract 3C 351 (z = 0.371), an X-ray-"quiet" quasar, is one of the few quasars showing signs of a "warm absorber" in its X-ray spectrum; i.e., partially ionized absorbing material in the line of sight whose opacity depends on its ionization structure. The main feature in the X-ray spectrum is a K- edge due to O VII or O VIII. 3C 351 also shows unusually strong, blueshifted, associated, absorption lines in the ultraviolet (Bahcall et al. 1993) including O VI (位位1031, 1037). This high ionization state strongly suggests an identification with the X-ray absorber and a site within the active nucleus. In this paper we demonstrate that the X-ray and UV absorption is due to the same material. This is the first confirmed UV/X-ray absorber. Physical conditions of the absorber are determined through the combination of constraints derived from both the X-ray and UV analysis. This highly ionized, outflowing, low-density, high-column density absorber situated outside the broad emission line region (BELR) is a previously unknown component of nuclear material. We rule out the identification of the absorber with a BELR cloud as the physical conditions in the two regions are inconsistent with one another. The effect of the X-ray quietness and IR upturn in the 3C 351 continuum on the BELR is also investigated. The strengths of the high- ionization lines of C IV 位1549 and O VI 位1034 with respect to Ly伪 are systematically lower (up to a factor of 10) in the material ionized by the 3C 351 continuum as compared to those produced by the "standard" quasar continuum, the strongest effect being on the strength of O VI 位1034. We find that for a 3C 351-like continuum, C III] 位1909 ceases to be a density indicator. Publication: The Astrophysical Journal Pub Date: October 1994 DOI: 10.1086/174750 Bibcode: 1994ApJ...434..493M Keywords: Absorption Spectra; Active Galactic Nuclei; Interstellar Matter; Oxygen; Quasars; Ultraviolet Astronomy; Ultraviolet Spectra; X Ray Astronomy; X Ray Spectra; Astronomical Models; Carbon; Hubble Space Telescope; Ionization; Iue; Lyman Alpha Radiation; Rosat Mission; Astrophysics; GALAXIES: QUASARS: ABSORPTION LINES; GALAXIES: QUASARS: INDIVIDUAL ALPHANUMERIC: 3C 351; ULTRAVIOLET: GALAXIES; X-RAYS: GALAXIES full text sources ADS | data products SIMBAD (3) MAST (2) NED (1) HEASARC (1) ESA (1)