Constraining the mass and radius of neutron stars in globular clusters

doi:10.1093/mnras/sty215

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Constraining the mass and radius of neutron stars in globular clusters
	Steiner, AW; Li CK(李承奎); Han, S; Bahramian, A; Ho, WCG; Li, CK; Bogdanov, S; Heinke, CO
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018
卷号	476 期号:1 页码:421-435
关键词	dense matter stars: neutron globular clusters: general X-rays: binaries
ISSN号	0035-8711
DOI	10.1093/mnras/sty215
文献子类	Article
英文摘要	We analyse observations of eight quiescent low-mass X-ray binaries in globular clusters and combine them to determine the neutron star mass-radius curve and the equation of state of dense matter. We determine the effect that several uncertainties may have on our results, including uncertainties in the distance, the atmosphere composition, the neutron star maximum mass, the neutron star mass distribution, the possible presence of a hotspot on the neutron star surface, and the prior choice for the equation of state of dense matter. The distance uncertainty is implemented in a new Gaussian blurring method that can be directly applied to the probability distribution over mass and radius. We find that the radius of a 1.4 solar mass neutron star is most likely from 10 to 14 km and that tighter constraints are only possible with stronger assumptions about the nature of the neutron stars, the systematics of the observations, or the nature of dense matter. Strong phase transitions in the equation of state are preferred, and in this case, the radius is likely smaller than 12 km. However, radii larger than 12 km are preferred if the neutron stars have uneven temperature distributions.
电子版国际标准刊号	1365-2966
WOS关键词	X-RAY BINARY ; EQUATION-OF-STATE ; HORIZONTAL-BRANCH MORPHOLOGY ; RELATIVE DISTANCES ; OMEGA-CENTAURI ; AQUILA X-1 ; 47 TUCANAE ; NGC 6304 ; CEN X-4 ; QUIESCENT
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000429276700034
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285800]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Steiner, AW,Li CK,Han, S,et al. Constraining the mass and radius of neutron stars in globular clusters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,476(1):421-435.
APA	Steiner, AW.,李承奎.,Han, S.,Bahramian, A.,Ho, WCG.,...&Heinke, CO.(2018).Constraining the mass and radius of neutron stars in globular clusters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,476(1),421-435.
MLA	Steiner, AW,et al."Constraining the mass and radius of neutron stars in globular clusters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 476.1(2018):421-435.