Thomson thick X-ray absorption in a broad absorption line quasar, PG 0946+301

被引：35

作者：

Mathur, S ^{[1
]}

Green, PJ

Arav, N

Brotherton, M

Crenshaw, M

DeKool, M

Elvis, M

Goodrich, RW

Hamann, F

Hines, DC

Kashyap, V

Korista, K

Peterson, BM

Shields, JC

Shlosman, I

van Breugel, W

Voit, M

机构：

[1] Ohio State Univ, Columbus, OH 43220 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Univ Calif Berkeley, Berkeley, CA 94720 USA

[4] Natl Opt Astron Observ, Tucson, AZ 85726 USA

[5] Catholic Univ, Greenbelt, MD 20771 USA

[6] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[7] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[8] WM Keck Observ, Kamuela, HI 96743 USA

[9] Univ Florida, Gainesville, FL 32611 USA

[10] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[11] Western Michigan Univ, Kalamazoo, MI 49008 USA

[12] Ohio Univ, Athens, OH 45701 USA

[13] Univ Kentucky, Lexington, KY 40506 USA

[14] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[15] Space Telescope Sci Inst, Baltimore, MD 21218 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 533卷 / 02期

基金：

美国国家航空航天局;

关键词：

galaxies : active; quasars : absorption lines; quasars : individual (PG 0946+301); X-rays : galaxies;

D O I：

10.1086/312617

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a deep ASCA observation of a broad absorption line quasar (BALQSQ) PG 0946+301. The source was clearly detected in one of the gas imaging spectrometers, but not in any other detector. If BALQSOs have intrinsic X-ray spectra similar to normal radio-quiet quasars, our observations imply that there is Thomson thick X-ray absorption (N-H greater than or similar to 10(24) cm(-2)) toward PG 0946+301. This is the largest column density estimated so far toward a BALQSO. The absorber must be at least partially ionized and may be responsible for attenuation in the optical and UV. If the Thomson optical depth toward BALQSOs is close to 1, as inferred here, then spectroscopy in hard X-rays with large telescopes like XMM would be feasible.

引用

页码：L79 / L82

页数：4

共 22 条

[1]

Arav N, 1997, ASTR SOC P, V128, P208

[2] Hubble Space Telescope observations of the broad absorption line quasar PG 0946+301 [J].