Close-in Exoplanets as Candidates for Strange Quark Matter Objects
Kuerban,Abudushataer1,2; Geng,Jin-Jun1,2; Huang,Yong-Feng1,2; Zong,Hong-Shi3,4,5; Gong,Hang6
Source PublicationThe Astrophysical Journal
AbstractAbstract Since the true ground state of hadrons may be strange quark matter (SQM), pulsars may actually be strange stars rather than neutron stars. According to this SQM hypothesis, strange planets can also stably exist. The density of normal matter planets can hardly be higher than 30?g?cm?3. They will be tidally disrupted when the orbital radius is less than ~5.6?×?1010 cm, or when the orbital period (Porb) is less than ~6100 s. However, an SQM planet can safely survive even when it is very close to the host, due to its high density. This feature can help us identify SQM objects. Here, we have tried to search for SQM objects among close-in exoplanets orbiting around pulsars. It is found that four pulsar planets (XTE J1807-294 b, XTE J1751-305 b, PSR 0636 b, PSR J1807-2459A b) completely meet the criterion of Porb?
KeywordGravitational waves Pulsars Neutron stars Exoplanet systems
WOS IDIOP:0004-637X-890-1-ab698b
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, People's Republic of China;,,
2.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People's Republic of China
3.Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
4.Department of Physics, Anhui Normal University, Wuhu, Anhui 241000, People's Republic of China
5.Nanjing Proton Source Research and Design Center, Nanjing 210093, People's Republic of China
6.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
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GB/T 7714
Kuerban,Abudushataer,Geng,Jin-Jun,Huang,Yong-Feng,et al. Close-in Exoplanets as Candidates for Strange Quark Matter Objects[J]. The Astrophysical Journal,2020,890(1).
APA Kuerban,Abudushataer,Geng,Jin-Jun,Huang,Yong-Feng,Zong,Hong-Shi,&Gong,Hang.(2020).Close-in Exoplanets as Candidates for Strange Quark Matter Objects.The Astrophysical Journal,890(1).
MLA Kuerban,Abudushataer,et al."Close-in Exoplanets as Candidates for Strange Quark Matter Objects".The Astrophysical Journal 890.1(2020).
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