Spectral properties of the neutron star low-mass X-ray binaries 4U 1636-53, XTE J1739-285, and MAXI J1816-195

doi:10.1051/0004-6361/202451211

YNAO OpenIR > 星系类星体研究组

	Spectral properties of the neutron star low-mass X-ray binaries 4U 1636-53, XTE J1739-285, and MAXI J1816-195
	Fei, Zhenyan 1,2; Lyu, Ming 1,2; Zhang GB(张国宝)3,4 ; Yang, Xuejuan 1,2; García, Federico 5
发表期刊	Astronomy and Astrophysics
	2025-03-01
卷号	695
DOI	10.1051/0004-6361/202451211
产权排序	第3完成单位
收录类别	SCI ; EI
关键词	accretion accretion disks binaries: spectroscopic stars: neutron
摘要	We investigated simultaneous NICER plus NuSTAR observations of the three neutron star low-mass X-ray binaries 4U 1636-53, XTE J1739-285, and MAXI J1816-195 using the latest reflection models. The seed photons in our models that are fed into the corona originated from either the neutron star (NS) or the accretion disk. We found that for the sources in the hard spectral state, more than ∼50% of the NS photons enter the corona when the NS provides seed photons, while only ∼3-5% of the disk photons enter the corona when the seed photons come from the disk. This finding, together with the derived small height of the corona, favors a lamp-post geometry or a boundary layer scenario in which the corona is close to the central NS. Additionally, we found that the source of the seed photons has a strong influence on the significance of the NS radiation, especially for the soft spectral state. This result may help us to explain why the NS radiation in MAXI J1816-195 was weak in previous work. More importantly, for the first time, we explored the properties of the corona in the NS systems with the compactness (l-θ) diagram. We found that coronae in NS systems all lie on the left side of the pair-production forbidden region, away from the predicted pair-production lines. This finding indicates that either the corona in these NS systems is not pair dominated, possibly due to the additional cooling from NS photons, or the corona is composed of both thermal and nonthermal electrons. © The Authors 2025.
资助项目	National Natural Science Foundation of China[12122302]
项目资助者	National Natural Science Foundation of China[12122302]
语种	英语
学科领域	天文学 ; 恒星与银河系 ; 天体物理学 ; 高能天体物理学
文章类型	Journal article (JA)
ISSN	0004-6361
URL	查看原文
EI入藏号	20251118044773
EI主题词	Photons
EI分类号	1301.1.3 Atomic and Molecular Physics - 1301.2.1 High Energy Physics - 1301.2.1.1.1 Hadron Colliders - 1301.4 Solid State Physics - 1302.1.2 Extraterrestrial Physics and Stellar Phenomena - 208 Coatings, Surfaces, Finishes, Films and Deposition
引用统计
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/28218
专题	星系类星体研究组中国科学院天体结构与演化重点实验室
作者单位	1.Department of Physics, Xiangtan University, Hunan, Xiangtan, 411105, China; 2.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Hunan, Xiangtan, 411105, China; 3.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, 650216, China; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming, 650216, China; 5.Instituto Argentino de Radioastronomía (CCT La Plata CONICET, CICPBA, UNLP), C.C.5, 6., Villa Elisa, Argentina
推荐引用方式 GB/T 7714	Fei, Zhenyan,Lyu, Ming,Zhang GB,et al. Spectral properties of the neutron star low-mass X-ray binaries 4U 1636-53, XTE J1739-285, and MAXI J1816-195[J]. Astronomy and Astrophysics,2025,695.
APA	Fei, Zhenyan,Lyu, Ming,张国宝,Yang, Xuejuan,&García, Federico.(2025).Spectral properties of the neutron star low-mass X-ray binaries 4U 1636-53, XTE J1739-285, and MAXI J1816-195.Astronomy and Astrophysics,695.
MLA	Fei, Zhenyan,et al."Spectral properties of the neutron star low-mass X-ray binaries 4U 1636-53, XTE J1739-285, and MAXI J1816-195".Astronomy and Astrophysics 695(2025).

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