Temperature measurement during thermonuclear X-ray bursts with BeppoSAX

被引：3
|
作者：
Beri, Aru [1 ]
Paul, Biswajit [2 ]
Orlandini, Mauro [3 ]
Maitra, Chandreyee [4 ]
机构：
[1] Indian Inst Technol Ropar, Dept Phys, Nangal Rd, Rupnagar 140001, Punjab, India
[2] Raman Res Inst, CV Raman Ave, Bangalore 560012, Karnataka, India
[3] INAF IASF Bologna, Via Gobetti 101, I-40129 Bologna, Italy
[4] Univ Paris Diderot, Lab AIM, Serv Astrophys, CEA,IRFU,CNRS,CEA Saclay, F-91191 Gif Sur Yvette, France
来源：
NEW ASTRONOMY | 2016年 / 45卷
关键词：
X-rays: binaries; X-rays: bursts; Stars: neutron; ENERGY CONCENTRATOR SPECTROMETER; NEUTRON-STAR MASSES; MODEL ATMOSPHERES; SPECTROSCOPIC MEASUREMENTS; SYSTEMATIC UNCERTAINTIES; ON-BOARD; SPECTRA; RADIUS; ACCRETION; EXPANSION;
D O I：
10.1016/j.newast.2015.10.013
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have carried out a study of temperature evolution during thermonuclear bursts in LMXBs using broad band data from two instruments onboard BeppoSAX, the MECS and the PDS. However, instead of applying the standard technique of time resolved spectroscopy, we have determined the temperature in small time intervals using the ratio of count rates in the two instruments assuming a blackbody nature of burst emission and different interstellar absorption for different sources. Data from a total of twelve observations of six sources were analyzed during which 22 bursts were detected. We have obtained temperatures as high as similar to 3.0 key, even when there is no evidence of photospheric radius expansion. These high temperatures were observed in the sources within different broadband spectral states (soft and hard). (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：48 / 53
页数：6
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