Searching for strange quark matter objects among white dwarfs
The ground state of matter may be strange quark matter (SQM), not hadronic matter. A whole sequence of SQM objects, ranging from strange quark stars and strange quark dwarfs to strange quark planets, can stably exist according to this SQM hypothesis. A strange dwarf has a mass similar to that of a n...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322003380 |
| _version_ | 1828788848089366528 |
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| author | Abdusattar Kurban Yong-Feng Huang Jin-Jun Geng Hong-Shi Zong |
| author_facet | Abdusattar Kurban Yong-Feng Huang Jin-Jun Geng Hong-Shi Zong |
| author_sort | Abdusattar Kurban |
| collection | DOAJ |
| description | The ground state of matter may be strange quark matter (SQM), not hadronic matter. A whole sequence of SQM objects, ranging from strange quark stars and strange quark dwarfs to strange quark planets, can stably exist according to this SQM hypothesis. A strange dwarf has a mass similar to that of a normal white dwarf, but could harbor an extremely dense SQM core (with the density as large as ∼4×1014gcm−3) at the center so that its radius can be correspondingly smaller. In this study, we try to search for strange dwarfs among the observed “white dwarfs” by considering their difference in the mass-radius relation. Seven strange dwarf candidates are identified in this way, whose masses are in the range of ∼0.02–0.12M⊙, with the radii narrowly distributed in ∼9,000–15,000 km. The seven objects are LSPM J0815+1633, LP 240-30, BD+20 5125B, LP 462-12, WD J1257+5428, 2MASS J13453297+4200437, and SDSS J085557.46+053524.5. Comparing with white dwarfs of similar mass, these candidates are obviously smaller in radius. Further observations with large radio/infrared/optical telescopes on these interesting candidates are solicited. |
| first_indexed | 2024-12-12T01:00:30Z |
| format | Article |
| id | doaj.art-c44cbab7d6624745804208bf66bfdbae |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-12T01:00:30Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-c44cbab7d6624745804208bf66bfdbae2022-12-22T00:43:44ZengElsevierPhysics Letters B0370-26932022-09-01832137204Searching for strange quark matter objects among white dwarfsAbdusattar Kurban0Yong-Feng Huang1Jin-Jun Geng2Hong-Shi Zong3Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, People's Republic of China; School of Astronomy and Space Science, Nanjing University, Nanjing 210023, Jiangsu, People's Republic of China; Xinjiang Key Laboratory of Radio Astrophysics, Urumqi 830011, Xinjiang, People's Republic of China; Corresponding author at: Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, People's Republic of China.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, Jiangsu, People's Republic of China; Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, Jiangsu, People's Republic of China; Corresponding author at: School of Astronomy and Space Science, Nanjing University, Nanjing 210023, Jiangsu, People's Republic of China.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, Jiangsu, People's Republic of ChinaDepartment of Physics, Nanjing University, Nanjing 210093, Jiangsu, People's Republic of China; Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing University, Nanjing 210093, Jiangsu, People's Republic of China; Nanjing Institute of Proton Source Technology, Nanjing 210046, Jiangsu, People's Republic of China; Department of Physics, Anhui Normal University, Wuhu 241000, Anhui, People's Republic of ChinaThe ground state of matter may be strange quark matter (SQM), not hadronic matter. A whole sequence of SQM objects, ranging from strange quark stars and strange quark dwarfs to strange quark planets, can stably exist according to this SQM hypothesis. A strange dwarf has a mass similar to that of a normal white dwarf, but could harbor an extremely dense SQM core (with the density as large as ∼4×1014gcm−3) at the center so that its radius can be correspondingly smaller. In this study, we try to search for strange dwarfs among the observed “white dwarfs” by considering their difference in the mass-radius relation. Seven strange dwarf candidates are identified in this way, whose masses are in the range of ∼0.02–0.12M⊙, with the radii narrowly distributed in ∼9,000–15,000 km. The seven objects are LSPM J0815+1633, LP 240-30, BD+20 5125B, LP 462-12, WD J1257+5428, 2MASS J13453297+4200437, and SDSS J085557.46+053524.5. Comparing with white dwarfs of similar mass, these candidates are obviously smaller in radius. Further observations with large radio/infrared/optical telescopes on these interesting candidates are solicited.http://www.sciencedirect.com/science/article/pii/S0370269322003380Compact objectsStrange quark matterStrange quark stars |
| spellingShingle | Abdusattar Kurban Yong-Feng Huang Jin-Jun Geng Hong-Shi Zong Searching for strange quark matter objects among white dwarfs Physics Letters B Compact objects Strange quark matter Strange quark stars |
| title | Searching for strange quark matter objects among white dwarfs |
| title_full | Searching for strange quark matter objects among white dwarfs |
| title_fullStr | Searching for strange quark matter objects among white dwarfs |
| title_full_unstemmed | Searching for strange quark matter objects among white dwarfs |
| title_short | Searching for strange quark matter objects among white dwarfs |
| title_sort | searching for strange quark matter objects among white dwarfs |
| topic | Compact objects Strange quark matter Strange quark stars |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322003380 |
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