AAS 201st Meeting, January, 2003
Session 114. Quasars
Poster, Thursday, January 9, 2003, 9:20am-4:00pm, Exhibit Hall AB

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[114.03] An Intrinsic Absorption Complex Toward {RX~J1230.8+0115}: Geometry and Photoionization Conditions

R. Ganguly (STScI), J. Masiero, J. C. Charlton (PSU), K. R. Sembach (STScI)

We present HST/STIS and FUSE spectra of the quasar {RX~J1230.8+0115} (V=14.4, z=0.117). In addition to Galactic, Virgo, and intervening absorption, this quasar is host to a remarkable intrinsic absorption complex. Four narrow absorption line systems, strong in CIV, NV, and OVI, lie within 5000 km/s of the QSO redshift. Three of the systems appear to be line-locked, two in NV, and two in OVI, with the common system residing in between the other two (in velocity). All three systems show signs of an intrinsic origin -- smooth wind-like profiles, high ionization, and partial coverage of the central engine. The fourth system, which appears at the systemic redshift of the QSO, may originate from host galaxy or intervening gas. Photoionization analyses reveal column densities in the range log N(H)=18.7-20.5 and ionization parameters in the range log U=-1.7 - 0.3, with an interesting trend - larger column density components are also more highly ionized. Revisiting the issue of line-locking, we discuss a possible model in the context of the accretion-disk/wind scenario and point out several issues that remain for future simulations and observations.

This work was funded through NASA grant NAG5-10817 at Penn State, and GO-08097.02A at The Space Telescope Science Institute.

The author(s) of this abstract have provided an email address for comments about the abstract: ganguly@stsci.edu

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