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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; Shao, L. J.9
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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.

KeywordBinaries: General Gravitational Waves Pulsars: Individual (Psr b0919+06)
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS KeywordMillisecond Pulsar ; White-dwarfs ; Psr b0919+06 ; Evolution ; Accretion ; Masses ; Stars ; Spin
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000426709000007
Funding OrganizationNational Natural Science Foundation of China(NSFC11373018, NSFC 11703064, NSFC11503006) ; Beyond the Horizons ; Strategic priority Research Program(XDB23010200)
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorGong, B. P.
Affiliation1.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
Recommended Citation
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):35.
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),35.
MLA Gong, B. P.,et al."Searching Ultra-compact Pulsar Binaries with Abnormal Timing Behavior".ASTROPHYSICAL JOURNAL 855.1(2018):35.
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