The X-ray diffuse emission from the Galactic Center

被引：0
作者：
Sidoli, L
Mereghetti, S
机构：
[1] CNR, Ist Fis Cosm G Occhialini, I-20133 Milan, Italy
[2] Univ Milan, Dipartimento Fis, Sez Astrofis, I-20133 Milan, Italy
来源：
ASTRONOMY & ASTROPHYSICS | 1999年 / 349卷 / 02期
关键词：
ISM : supernova remnants; Galaxy : center; X-rays : general; X-rays : ISM;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A long BeppoSAX observation of the Galactic Center region shows that the spectrum of the diffuse X-ray emission from the SgrA Complex can be described with the sum of two thermal plasma models with temperatures of similar to 0.6 keV and similar to 8-9 keV. The spatial distribution of the diffuse emission is energy dependent. While the hard X-ray emission has a nearly symmetric distribution elongated along the Galactic Plane, the soft X-rays (E < 5 keV) are remarkably well correlated with the triangular radio halo of SgrA East. The parameters derived for the soft component support the interpretation of the SgrA East shell in terms of an evolved supernova remnant.
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页码：L49 / L52
页数：4
相关论文
共 35 条
[1]   RADIO STUDIES OF THE GALACTIC-CENTER .2. THE ARC, THREADS AND RELATED FEATURES AT 90-CM (330-MHZ) [J].
ANANTHARAMAIAH, KR ;
PEDLAR, A ;
EKERS, RD ;
GOSS, WM .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 249 (02) :262-&
[2]   INTENSE SUB-ARC-SECOND STRUCTURE IN GALACTIC-CENTER [J].
BALICK, B ;
BROWN, RL .
ASTROPHYSICAL JOURNAL, 1974, 194 (02) :265-270
[3]  
BERKHUIJSEN EM, 1986, ASTRON ASTROPHYS, V166, P257
[4]   The medium-energy concentrator spectrometer on board the BeppoSAX X-ray astronomy satellite [J].
Boella, G ;
Chiappetti, L ;
Conti, G ;
Cusumano, G ;
DelSordo, S ;
LaRosa, G ;
Maccarone, MC ;
Mineo, T ;
Molendi, S ;
Re, S ;
Sacco, B ;
Tripiciano, M .
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :327-340
[5]  
Cremonesi DI, 1999, ASTRON ASTROPHYS, V345, P826
[6]   RADIO-SOURCE AT GALACTIC NUCLEUS [J].
DAVIES, RD ;
WALSH, D ;
BOOTH, RS .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1976, 177 (02) :319-333
[7]  
ECKERS RD, 1983, A A, V122, P143
[8]   High proper-motion stars in the vicinity of Sagittarius A* Evidence for a supermassive black hole at the center of our galaxy [J].
Ghez, AM ;
Klein, BL ;
Morris, M ;
Becklin, EE .
ASTROPHYSICAL JOURNAL, 1998, 509 (02) :678-686
[9]   Complex spectra of the galactic ridge X-rays observed with ASCA [J].
Kaneda, H ;
Makishima, K ;
Yamauchi, S ;
Koyama, K ;
Matsuzaki, K ;
Yamasaki, NY .
ASTROPHYSICAL JOURNAL, 1997, 491 (02) :638-652
[10]   X-RAY OBSERVATIONS OF THE GALACTIC-CENTER BY SPARTAN-1 [J].
KAWAI, N ;
FENIMORE, EE ;
MIDDLEDITCH, J ;
CRUDDACE, RG ;
FRITZ, GG ;
SNYDER, WA ;
ULMER, MP .
ASTROPHYSICAL JOURNAL, 1988, 330 (01) :130-141
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