A broad iron line in the Chandra/HETG spectrum of 4U 1705-44

被引：0
作者：
Di Salvo, T
Iaria, R
Méndez, M
Burderi, L
Robba, NR
Stella, L
van der Klis, M
机构：
[1] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands
[2] Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands
[3] Univ Palermo, Dipartimento Sci Fis & Astron, I-90123 Palermo, Italy
[4] SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands
[5] Osserv Astron Roma, I-00040 Rome, Italy
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2004年 / 132卷
关键词：
D O I：
10.1016/j.nuclphysbps.2004.04.102
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present preliminary results from a Chandra 30 ks observation of the atoll source 4U 1705-44. In particular we concentrate on the study of discrete features in the energy spectrum at energies below similar to 3 keV, as well as the iron Kalpha line, using the HEG spectrometer on board of the Chandra satellite. The iron Ka line at similar to 6.6 keV is found to be intrinsically broad (FWHM similar to 1.7 keV); its width can be explained by reflection from a cold accretion disk extending down to similar to 17 km from the neutron star center or by broadening in the hotter (similar to 3 - 4 keV) Comptonizing corona.
引用
收藏
页码：600 / 603
页数：4
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