The discovery of a new non-thermal X-ray filament near the Galactic Centre

被引：37

作者：

Sakano, M ^{[1
]}

Warwick, RS

Decourchelle, A

Predehl, P

机构：

[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[2] Ctr Etud Saclay, Serv Astrophys, DAPNIA, DSM,CEA, F-91191 Gif Sur Yvette, France

[3] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 340卷 / 03期

关键词：

Galaxy : centre; X-rays : individual : XMM J174540-2904.5; X-rays : ISM;

D O I：

10.1046/j.1365-8711.2003.06299.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery by XMM-Newton and Chandra of a hard extended X-ray source (XMM J174540-2904.5) associated with a compact non-thermal radio filament (the Sgr A-E 'wisp'= 1LC 359.888-0.086 = G359.88-0.07), which is located within similar to4 arcmin of the Galactic Centre. The source position is also coincident with the peak of the molecular cloud M-0.13-0.08 (the '20 km s(-1)' cloud). The X-ray spectrum is non-thermal with an energy index of 1.0(-0.9) (+1.1) and a column density of 38(-11) (+7) x 10(22) H cm(-2). The observed 2-10 keV flux of 4 x 10(-13) erg s(-1)cm(-2) converts to an unabsorbed X-ray luminosity of 1 x 10(34) erg s(-1) assuming a distance of 8.0 kpc. The high column density strongly suggests that this source is located in or behind the Galactic Centre region. Taking account of the broad-band spectrum, as well as the source morphology and the positional coincidence with a molecular cloud, we conclude that both the radio and X-ray emission are the result of synchrotron radiation. This is the first time that a filamentary structure in the Galactic Centre region has been shown, unequivocally, to have a non-thermal X-ray spectrum.

引用

页码：747 / 751

页数：5

共 32 条

[21]

MORRIS M, 1994, NATO ADV SCI I C-MAT, V445, P185

[22] INTERSTELLAR PHOTOELECTRIC ABSORPTION CROSS-SECTIONS, 0.03-10 KEV [J].

MORRISON, R ;

MCCAMMON, D .

ASTROPHYSICAL JOURNAL, 1983, 270 (01) :119-122

[23] Maximum energies of shock-accelerated electrons in young shell supernova remnants [J].

Reynolds, SP ;

Keohane, JW .

ASTROPHYSICAL JOURNAL, 1999, 525 (01) :368-374

[24] ASCA X-ray source catalog in the galactic center region [J].

Sakano, M ;

Koyama, K ;

Murakami, H ;

Maeda, Y ;

Yamauchi, S .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2002, 138 (01) :19-34

[25] The European Photon Imaging Camera on XMM-Newton:: The pn-CCD camera [J].

Strüder, L ;

Briel, U ;

Dennerl, K ;

Hartmann, R ;

Kendziorra, E ;

Meidinger, N ;

Pfeffermann, E ;

Reppin, C ;

Aschenbach, B ;

Bornemann, W ;

Bräuninger, H ;

Burkert, W ;

Elender, M ;

Freyberg, M ;

Haberl, F ;

Hartner, H ;

Heuschmann, F ;

Hippmann, H ;

Kastelic, E ;

Kemmer, S ;

Kettenring, G ;

Kink, W ;

Krause, N ;

Müller, S ;

Oppitz, A ;

Pietsch, W ;

Popp, M ;

Predehl, P ;

Read, A ;

Stephan, KH ;

Stötter, D ;

Trümper, J ;

Holl, P ;

Kemmer, J ;

Soltau, H ;

Stötter, R ;

Weber, U ;

Weichert, U ;

von Zanthier, C ;

Carathanassis, D ;

Lutz, G ;

Richter, RH ;

Solc, P ;

Böttcher, H ;

Kuster, M ;

Staubert, R ;

Abbey, A ;

Holland, A ;

Turner, M ;

Balasini, M .

ASTRONOMY & ASTROPHYSICS, 2001, 365 (01) :L18-L26

[26] The European Photon Imaging Camera on XMM-Newton:: The MOS cameras [J].

Turner, MJL ;

Abbey, A ;

Arnaud, M ;

Balasini, M ;

Barbera, M ;

Belsole, E ;

Bennie, PJ ;

Bernard, JP ;

Bignami, GF ;

Boer, M ;

Briel, U ;

Butler, I ;

Cara, C ;

Chabaud, C ;

Cole, R ;

Collura, A ;

Conte, M ;

Cros, A ;

Denby, M ;

Dhez, P ;

Di Coco, G ;

Dowson, J ;

Ferrando, P ;

Ghizzardi, S ;

Gianotti, F ;

Goodall, CV ;

Gretton, L ;

Griffiths, RG ;

Hainaut, O ;

Hochedez, JF ;

Holland, AD ;

Jourdain, E ;

Kendziorra, E ;

Lagostina, A ;

Laine, R ;

La Palombara, N ;

Lortlolary, M ;

Lumb, D ;

Marty, P ;

Molendi, S ;

Pigot, C ;

Poindron, E ;

Pounds, KA ;

Reeves, JN ;

Reppin, C ;

Rothenflug, R ;

Salvetat, P ;

Sauvageot, JL ;

Schmitt, D ;

Sembay, S .

ASTRONOMY & ASTROPHYSICS, 2001, 365 (01) :L27-L35

[27] A faint discrete source origin for the highly ionized iron emission from the Galactic Centre region [J].

Wang, QD ;

Gotthelf, EV ;

Lang, CC .

NATURE, 2002, 415 (6868) :148-150

[28]

WANG QD, 2002, IN PRESS P NEW VIS X

[29]

WARWICK RS, 2002, IN PRESS P NEW VIS X

[30] Detection of X-ray emission from the arches cluster near the Galactic center [J].

Yusef-Zadeh, F ;

Law, C ;

Wardle, M ;

Wang, QD ;

Fruscione, A ;

Lang, CC ;

Cotera, A .

ASTROPHYSICAL JOURNAL, 2002, 570 (02) :665-670

← 1 2 3 4 →