Three ultraluminous X-ray sources hosted by globular clusters in NGC 1316

被引：11

作者：

Dage, Kristen C. ^{[1
,2
]}

Kundu, Arunav ^{[3
]}

Thygesen, Erica ^{[4
]}

Bahramian, Arash ^{[5
]}

Haggard, Daryl ^{[1
,2
]}

Irwin, Jimmy A. ^{[6
]}

Maccarone, Thomas J. ^{[7
]}

Nair, Sneha ^{[1
]}

Peacock, Mark B. ^{[3
]}

Strader, Jay ^{[4
]}

Zepf, Stephen E. ^{[4
]}

机构：

[1] McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada

[2] McGill Univ, McGill Space Inst, 3550 Univ St, Montreal, PQ H3A 2A7, Canada

[3] Eureka Sci Inc, 2452 Delmer St,Suite 100, Oakland, CA 94602 USA

[4] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[5] Curtin Univ, Int Ctr Radio Astron Res, GPO Box U1987, Perth, WA 6845, Australia

[6] Univ Alabama, Dept Phys & Astron, Box 870324, Tuscaloosa, AL 35487 USA

[7] Texas Tech Univ, Dept Phys, Box 41051,Sci Bldg, Lubbock, TX 79409 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 504卷 / 01期

基金：

美国国家航空航天局; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

globular clusters: general; X-rays: binaries; BLACK-HOLE; STAR-CLUSTERS; MASS; BINARY; EMISSION; SYSTEM; VARIABILITY; CANDIDATE;

D O I：

10.1093/mnras/stab943

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have identified three ultraluminous X-ray sources (ULXs) hosted by globular clusters (GCs) within NGC 1316's stellar system. These discoveries bring the total number of known ULXs in GCs up to 20. We find that the X-ray spectra of the three new sources do not deviate from the established pattern of spectral behaviour of the other known GC ULXs. The consistency of the X-ray spectral behaviour for these sources points to multiple paths of formation and evolution mechanisms for these rare and unique sources. Using the now larger sample of GC ULXs, we compare the optical properties of the entire known population of GC ULXs to other GCs across five galaxies and find that the properties of clusters that host ULXs are quite different from the typical clusters. Lastly, any trend of GC ULXs being preferentially hosted by metal-rich clusters is not strongly significant in this sample.

引用

页码：1545 / 1554

页数：10

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