Discovery of Associated Absorption Lines in an X-Ray Warm Absorber:[ITAL]Hubble Space Telescope[/ITAL] Observations of PG 1114+445 | Zendy

Smita Mathur | Zendy; B. J. Wilkes | Zendy; M. Elvis | Zendy

Open Access

Discovery of Associated Absorption Lines in an X-Ray Warm Absorber:[ITAL]Hubble Space Telescope[/ITAL] Observations of PG 1114+445

Author(s) -

Smita Mathur,

B. J. Wilkes,

M. Elvis

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311520

Subject(s) - quasar , physics , astrophysics , redshift , absorption (acoustics) , hubble space telescope , astronomy , absorption spectroscopy , space telescope imaging spectrograph , ionization , galaxy , optics , ion , quantum mechanics

The unified picture of X-ray/UV absorbers offers an unique opportunity toprobe the nuclear environment of AGNs. To test the unified absorber scenarioand to understand the physical properties of the absorber we obtained the firstUV spectrum of PG1114+445, using HST FOS. PG1114+445 is known to have an X-rayionized (``warm'') absorber, so that UV absorption is predicted. The HSTspectrum 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-rayand UV absorbers are rare in radio-quiet quasars, these observations arguestrongly that the X-ray and UV absorbers are closely physically related,probably identical. We place constraints on the parameters of the absorber andconclude that the mass outflow rate is comparable to the accretion rate inPG1114+445.Comment: 12 pages, Latex, submitted to ApJ

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