Polarization of X-ray emission from the Sgr B2 cloud

被引：37

作者：

Churazov, E

Sunyaev, R

Sazonov, S

机构：

[1] Max Planck Inst Astrophys, D-85741 Garching, Germany

[2] Moscow Space Res Inst, Moscow 117810, Russia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2002年 / 330卷 / 04期

关键词：

polarization; scattering; ISM : individual : Sgr B2; Galaxy : centre; X-rays : general;

D O I：

10.1046/j.1365-8711.2002.05113.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Sgr B2 giant molecular cloud is claimed to be an 'X-ray reflection nebula' - the reprocessing site of a powerful flare of the Sgr A* source, which occurred a few hundred years ago. The shape of the X-ray spectrum and the strength of the iron fluorescent line support this hypothesis. We argue that the cleanest test of the origin of X-rays from Sgr B2 would be a detection of polarized emission from this source.

引用

收藏

页码：817 / 820

页数：4

相关论文

共 15 条

[1]

Chandrasekhar S, 1950, RAD TRANSFER

[2] An efficient photoelectric X-ray polarimeter for the study of black holes and neutron stars [J].

Costa, E ;

Soffitta, P ;

Bellazzini, R ;

Brez, A ;

Lumb, N ;

Spandre, G .

NATURE, 2001, 411 (6838) :662-665

[3]

CRAMPHORN C, 2001, UNPUB A A

[4]

KAASTRA JS, 1993, ASTRON ASTROPHYS SUP, V97, P443

[5] ASCA view of our galactic center: Remains of past activities in X-rays? [J].

Koyama, K ;

Maeda, Y ;

Sonobe, T ;

Takeshima, T ;

Tanaka, Y ;

Yamauchi, S .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 1996, 48 (02) :249-255

[6] ASCA observations of the sagittarius B2 cloud:: An X-ray reflection-nebula [J].

Murakami, H ;

Koyama, K ;

Sakano, M ;

Tsujimoto, M ;

Maeda, Y .

ASTROPHYSICAL JOURNAL, 2000, 534 (01) :283-290

[7] ASCA discovery of diffuse 6.4 keV emission near the Sagittarius C complex:: A new X-ray reflection nebula [J].

Murakami, H ;

Koyama, K ;

Tsujimoto, M ;

Maeda, Y ;

Sakano, M .

ASTROPHYSICAL JOURNAL, 2001, 550 (01) :297-300

[8] Chandra observations of diffuse X-rays from the Sagittarius B2 cloud [J].

Murakami, H ;

Koyama, K ;

Maeda, Y .

ASTROPHYSICAL JOURNAL, 2001, 558 (02) :687-692

[9] X-ray emission from the giant molecular clouds in the Galactic Center region and the discovery of new X-ray sources [J].

Sidoli, L ;

Mereghetti, S ;

Treves, A ;

Parmar, AN ;

Turolla, R ;

Favata, F .

ASTRONOMY & ASTROPHYSICS, 2001, 372 (02) :651-662

[10] Equivalent width, shape and proper motion of the iron fluorescent line emission from molecular clouds as an indicator of the illuminating source X-ray flux history [J].

Sunyaev, R ;

Churazov, E .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 297 (04) :1279-1291