Searching Ultra-compact Pulsar Binaries with Abnormal Timing Behavior

doi:10.3847/1538-4357/aaac34

	Searching Ultra-compact Pulsar Binaries with Abnormal Timing Behavior
	Gong, B. P.1; Li, Y. P.2; Yuan, J. P.3; Tian, J.1,4; Zhang, Y. Y.1; Li, D.5,6; Jiang, B.7; Li, X. D.7; Wang, H. G.8; Zou, Y. C.1
刊名	ASTROPHYSICAL JOURNAL
	2018-03-01
卷号	855 期号:1 页码:12
关键词	binaries: general gravitational waves pulsars: individual (PSR B0919+06)
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaac34
通讯作者	Gong, B. P.(bpgong@mail.hust.edu.cn)
英文摘要	Ultra-compact pulsar binaries are both ideal sources of gravitational radiation for gravitational wave detectors and laboratories for fundamental physics. However, the shortest orbital period of all radio pulsar binaries is currently 1.6 hr. The absence of pulsar binaries with a shorter orbital period is most likely due to technique limit. This paper points out that a tidal effect occurring on pulsar binaries with a short orbital period can perturb the orbital elements and result in a significant change in orbital modulation, which dramatically reduces the sensitivity of the acceleration searching that is widely used. Here a new search is proposed. The abnormal timing residual exhibited in a single pulse observation is simulated by a tidal effect occurring on an ultra-compact binary. The reproduction of the main features represented by the sharp peaks displayed in the abnormal timing behavior suggests that pulsars like PSR B0919+06 could be a candidate for an ultra-compact binary of an orbital period of similar to 10 minutes and a companion star of a white dwarf star. The binary nature of such a candidate is further tested by (1) comparing the predicted long-term binary effect with decades of timing noise observed and (2) observing the optical counterpart of the expected companion star. Test (1) likely supports our model, while more observations are needed in test (2). Some interesting ultra-compact binaries could be found in the near future by applying such a new approach to other binary candidates.
WOS关键词	MILLISECOND PULSAR ; WHITE-DWARFS ; PSR B0919+06 ; EVOLUTION ; ACCRETION ; MASSES ; STARS ; SPIN
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000426709000007
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22385]
专题	中国科学院紫金山天文台
通讯作者	Gong, B. P.
作者单位	1.Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 6.Chinese Acad Sci, Key Lab Radio Astron, Beijing, Peoples R China 7.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 8.Sch Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China 9.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Gong, B. P.,Li, Y. P.,Yuan, J. P.,et al. Searching Ultra-compact Pulsar Binaries with Abnormal Timing Behavior[J]. ASTROPHYSICAL JOURNAL,2018,855(1):12.
APA	Gong, B. P..,Li, Y. P..,Yuan, J. P..,Tian, J..,Zhang, Y. Y..,...&Shao, L. J..(2018).Searching Ultra-compact Pulsar Binaries with Abnormal Timing Behavior.ASTROPHYSICAL JOURNAL,855(1),12.
MLA	Gong, B. P.,et al."Searching Ultra-compact Pulsar Binaries with Abnormal Timing Behavior".ASTROPHYSICAL JOURNAL 855.1(2018):12.