Waiting in the wings: Reflected X-ray emission from the Homunculus nebula

被引：32

作者：

Corcoran, MF

Hamaguchi, K

Gull, T

Davidson, K

Petre, R

Hillier, DJ

Smith, N

Damineli, A

Morse, JA

Walborn, NR

Verner, E

Collins, N

White, S

Pittard, JM

Weis, K

Bomans, D

Butt, Y

机构：

[1] Univ Space Res Assoc, Seabrook, MD 20706 USA

[2] NASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771 USA

[3] CNR, Washington, DC 20001 USA

[4] NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771 USA

[5] Univ Minnesota, Dept Astron, Minneapolis, MN 55455 USA

[6] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[7] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA

[8] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfericas, BR-05508900 Sao Paulo, Brazil

[9] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA

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

[11] Catholic Univ Amer, Dept Phys, IACS, Washington, DC 20064 USA

[12] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[13] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[14] Ruhr Univ Bochum, Inst Astron, D-44780 Bochum, Germany

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

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 613卷 / 01期

关键词：

circumstellar matter; ISM : individual (Homunculus nebula); reflection nebulae; stars : individual (eta Carinae); X-rays : stars;

D O I：

10.1086/423024

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first detection of X-ray emission associated with the Homunculus nebula that surrounds the supermassive star eta Car. The emission is characterized by a temperature in excess of 100 MK and is consistent with scattering of the time-delayed X-ray flux associated with the star. The nebular emission is bright in the northwestern lobe and near the central regions of the Homunculus, and fainter in the southeastern lobe. We also report the detection of an unusually broad Fe K fluorescent line, which may indicate fluorescent scattering off the wind of a companion star or some other high-velocity outflow. The X-ray Homunculus is the nearest member of the small class of Galactic X-ray reflection nebulae, and the only one in which both the emitting and reflecting sources are distinguishable.

引用

页码：381 / 386

页数：6

共 31 条

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