Discovery of Associated Absorption Lines in an X-ray Warm Absorber: HST Observations of PG1114+445

Abstract

The unified picture of X-ray/UV absorbers offers an unique opportunity to probe the nuclear environment of AGNs. To test the unified absorber scenario and to understand the physical properties of the absorber we obtained the first UV spectrum of PG1114+445, using HST FOS. PG1114+445 is known to have an X-ray ionized (``warm'') absorber, so that UV absorption is predicted. The HST spectrum clearly shows strong UV absorption lines due to Lya, CIV and NV, blueshifted by ~600 km/s with respect to the quasar redshift. Since both X-ray and UV absorbers are rare in radio-quiet quasars, these observations argue strongly that the X-ray and UV absorbers are closely physically related, probably identical. We place constraints on the parameters of the absorber and conclude that the mass outflow rate is comparable to the accretion rate in PG1114+445.

12 pages, Latex, submitted to ApJL

References in corpus (1)

• Evidence for Absorption due to Highly-Ionized Gas in the Radio-quiet Quasar PG 1114+445

Cited by in corpus (30)

• A Structure for Quasars
• The XMM-Newton view of PG quasars I. X-ray continuum and absorption
• On the Nature of Soft X-ray Weak Quasi-Stellar Objects
• XMM-Newton EPIC observations of 21 low-redshift PG quasars
• Toward a Self Consistent Model of the Ionized Absorber in NGC 3783
• Ionized Absorbers in AGN: the Role of Collisional Ionization and Time-Evolving Photoionization
• On the origin of the Fe K-alpha line cores in Active Galactic Nuclei
• Heavy X-ray Absorption in Soft X-ray Weak Active Galactic Nuclei
• Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua
• Dynamics of Warm-Absorbing Gas in Seyfert Galaxies: NGC 5548
• Emission Line Properties of the Large Bright Quasar Survey
• Evidence for Photoionization Driven Broad Absorption Line Variability
• The Ionized Nuclear Environment in NGC 985 as seen by Chandra and BeppoSAX
• Multiphase quasar-driven outflows in PG 1114+445. I. Entrained ultra-fast outflows
• Supermassive Black Hole Winds in X-rays -- SUBWAYS. I. Ultra-fast outflows in QSOs beyond the local Universe
• Multiple Velocity Components in the CIV Absorption Line of NGC5548
• The XMM-Newton/HST view of the obscuring outflow in the Seyfert Galaxy Mrk 335 observed at extremely low X-ray flux
• The Nature of Associated Absorption and the UV-X-ray Connection in 3C 288.1
• Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the UV anomaly in NGC 5548 with X-Ray Spectroscopy
• HST/COS observations of a new population of associated QSO absorbers
• Observational Evidence for a Multiphase Outflow in QSO FIRST J1044+3656
• A compact, metal-rich, kpc-scale outflow in FBQS J0209-0438: Detailed diagnostics from HST/COS extreme UV observations
• The weak absorbing outflow in AGN Mrk 279: evidence of super-solar metal abundances
• New Insights Into The Narrow-Line Seyfert 1 Phenomenon
• H-beta Line Width and the UV-X-ray Spectra of Luminous AGN
• Surprises from a deep ASCA spectrum of a Broad Absorption Line Quasar PHL 5200
• Broad Absorption Line Quasars and the Radio-Loud/Radio-Quiet Dichotomy
• XMM-Newton observations of warm absorbers in PG quasars
• Chandra LETGS spectroscopy of the Quasar MR2251-178 and its warm absorber
• X-ray obscuration from a variable ionized absorber in PG 1114+445