Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies
文献类型：期刊论文
| 作者 | Irwin, Jimmy A.1; Maksym, W. Peter2; Sivakoff, Gregory R.3; Romanowsky, Aaron J.4,5; Lin, Dacheng6; Speegle, Tyler1; Prado, Ian1; Mildebrath, David1; Strader, Jay7; Liu, Jifeng8,9
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| 刊名 | NATURE
 |
| 出版日期 | 2016-10-20 |
| 卷号 | 538期号:7625页码:356-+ |
| 英文摘要 | A flaring X-ray source was found near the galaxy NGC 4697 (ref. 1). Two brief flares were seen, separated by four years. During each flare, the flux increased by a factor of 90 on a timescale of about one minute. There is no associated optical source at the position of the flares(1), but if the source was at the distance of NGC 4697, then the luminosities of the flares were greater than 10(39) erg per second. Here we report the results of a search of archival X-ray data for 70 nearby galaxies looking for similar flares. We found two ultraluminous flaring sources in globular clusters or ultracompact dwarf companions of parent elliptical galaxies. One source flared once to a peak luminosity of 9 x 10(40) erg per second; the other flared five times to 10(40) erg per second. The rise times of all of the flares were less than one minute, and the flares then decayed over about an hour. When not flaring, the sources appear to be normal accreting neutron-star or black-hole X-ray binaries, but they are located in old stellar populations, unlike the magnetars, anomalous X-ray pulsars or soft gamma repeaters that have repetitive flares of similar luminosities. |
| WOS标题词 | Science & Technology |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | GLOBULAR-CLUSTER SYSTEM ; ACS VIRGO CLUSTER ; DWARF GALAXIES ; NGC-5128 ; FIELD ; BINARIES ; DISTANCE ; FLARES ; POPULATION ; CENTAURUS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000386673100033 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6876]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Alabama, Dept Phys & Astron, Box 870324, Tuscaloosa, AL 35487 USA 2.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA 3.Univ Alberta, Dept Phys, CCIS 4-181, Edmonton, AB T6G 2E1, Canada 4.San Jose State Univ, Dept Phys & Astron, One Washington Sq, San Jose, CA 95192 USA 5.Univ Calif Observ, 1156 High St, Santa Cruz, CA 95064 USA 6.Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA 7.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA 8.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China 9.Univ Chinese Acad Sci, Coll Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 10.Univ Michigan, Dept Astron, 1085 South Univ Ave, Ann Arbor, MI 48103 USA |
| 推荐引用方式 GB/T 7714 | Irwin, Jimmy A.,Maksym, W. Peter,Sivakoff, Gregory R.,et al. Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies[J]. NATURE,2016,538(7625):356-+. |
| APA | Irwin, Jimmy A..,Maksym, W. Peter.,Sivakoff, Gregory R..,Romanowsky, Aaron J..,Lin, Dacheng.,...&Miller, Jon M..(2016).Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies.NATURE,538(7625),356-+. |
| MLA | Irwin, Jimmy A.,et al."Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies".NATURE 538.7625(2016):356-+. |
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来源：国家天文台
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