Type-I X-ray burst evolution of the new millisecond pulsar MAXI J1816-195 revealed by Insight-HXMT

被引：0
作者：
Wang, P. J. [1 ,2 ]
Chen, Y. P. [2 ]
Ji, L. [3 ]
Zhang, S. [2 ]
Zhang, S. N. [1 ,2 ]
Kong, L. D. [4 ]
Zhang, L. [2 ]
Tao, L. [2 ]
Qu, J. L. [1 ,2 ]
Ge, M. Y. [2 ]
Li, J. [5 ,6 ]
Chang, Z. [1 ,2 ]
Peng, J. Q. [1 ,2 ]
Shui, Q. C. [1 ,2 ]
Li, Z. S. [1 ,7 ]
机构：
[1] Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China
[3] Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China
[4] Eberhard Karls Univ Tubingen, Inst Astron & Astrophys, Kepler Ctr Astro & Particle Phys, D-72076 Tubingen, Germany
[5] Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
[6] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
[7] Xiangtan Univ, Sch Phys & Optoelect, Xiangtan 411105, Peoples R China
来源：
JOURNAL OF HIGH ENERGY ASTROPHYSICS | 2024年 / 41卷
关键词：
X-rays: binaries; X-rays: individual (MAXI J1816-195); THERMONUCLEAR BURSTS; ACCRETION; MODELS; EMISSION; RADIUS; MASS;
D O I：
10.1016/j.jheap.2024.02.004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report a study of the type-I X-ray bursts and persistent spectrum of the 2022 outburst of the newly discovered accreting millisecond pulsar MAXI J1816-195 observed by Insight-HXMT. The spectra of MAXI J1816-195 are similar to other accreting millisecond pulsars, i.e., a Comptonization shape with an electron temperature of similar to 10 keV. We find that the profiles of type-I X-ray bursts, as well as their spectra, evolve during the outburst. The evolutionary pattern becomes varied towards the end phase of outburst, suggesting a potential correlation with alterations in the burst fuel or the ignition region. Moreover, we find a giant burst, for the first time, with a peak luminosity twice than others and a shorter burst duration. The complete burst sample derived from this research provides more clues in probing the thermonuclear bursts during the outburst of the accreting millisecond pulsar system.
引用
收藏
页码：106 / 113
页数：8
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