Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries
According to the core fragmentation and dynamical capture theories of binary formation, binaries tend to form with nearly equal masses. The detection of intermediate-mass binaries with low mass ratios challenges these theories, as such binaries may form via disk fragmentation and are very important...
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2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ade704 |
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| author | Linfeng Chang Shengbang Qian Lei Zang Fuxing Li |
| author_facet | Linfeng Chang Shengbang Qian Lei Zang Fuxing Li |
| author_sort | Linfeng Chang |
| collection | DOAJ |
| description | According to the core fragmentation and dynamical capture theories of binary formation, binaries tend to form with nearly equal masses. The detection of intermediate-mass binaries with low mass ratios challenges these theories, as such binaries may form via disk fragmentation and are very important to investigate binary formation and evolution. However, there are few confirmed samples to robustly test theories of the formation and evolution of binaries due to observational challenges. The development of high-precision space telescopes brings opportunities to study such samples. Based on TESS data, we present the first study on four intermediate-mass eclipsing binaries with the Wilson–Devinney method, which are: TIC 283881816, TIC 343757299, TIC 72444347, and TIC 353077789. All are totally detached eclipsing binaries with q < 0.4. TIC 283881816, TIC 343757299, and TIC 72444347 are A-type binaries with mass ratios of q = 0.34, 0.28, 0.39, respectively. TIC 353077789 is a B-type binary with an extremely low mass ratio of q = 0.18. These low mass ratio systems imply that they are highly likely to be formed via disk fragmentation and will undergo a common envelope evolution. Particularly, TIC 72444347 with a period of 4 $\mathop{.}\limits^{{\rm{d}}}$ 4 still shows an eccentric orbit, while TIC 343757299 with a longer period (5 $\mathop{.}\limits^{{\rm{d}}}$ 8) does not, which poses a challenge to the Kraft break. By plotting these components in the H-R diagram, it hints that all systems are main-sequence (MS) primaries with pre-MS companions. They are valuable targets for testing theories of binary formation and evolution. |
| format | Article |
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| institution | Kabale University |
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| language | English |
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| series | The Astrophysical Journal |
| spelling | doaj-art-4181d429cce047d7bb562ec87f6134cf2025-08-20T03:51:44ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01988220110.3847/1538-4357/ade704Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing BinariesLinfeng Chang0https://orcid.org/0000-0002-8421-4561Shengbang Qian1Lei Zang2https://orcid.org/0000-0003-1674-0890Fuxing Li3https://orcid.org/0000-0002-0285-6051Department of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; qiansb@ynu.edu.cn; School of Artificial Intelligence, Yunnan Open University , Kunmig 650599, People's Republic of ChinaDepartment of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; qiansb@ynu.edu.cnDepartment of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; qiansb@ynu.edu.cnDepartment of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; qiansb@ynu.edu.cnAccording to the core fragmentation and dynamical capture theories of binary formation, binaries tend to form with nearly equal masses. The detection of intermediate-mass binaries with low mass ratios challenges these theories, as such binaries may form via disk fragmentation and are very important to investigate binary formation and evolution. However, there are few confirmed samples to robustly test theories of the formation and evolution of binaries due to observational challenges. The development of high-precision space telescopes brings opportunities to study such samples. Based on TESS data, we present the first study on four intermediate-mass eclipsing binaries with the Wilson–Devinney method, which are: TIC 283881816, TIC 343757299, TIC 72444347, and TIC 353077789. All are totally detached eclipsing binaries with q < 0.4. TIC 283881816, TIC 343757299, and TIC 72444347 are A-type binaries with mass ratios of q = 0.34, 0.28, 0.39, respectively. TIC 353077789 is a B-type binary with an extremely low mass ratio of q = 0.18. These low mass ratio systems imply that they are highly likely to be formed via disk fragmentation and will undergo a common envelope evolution. Particularly, TIC 72444347 with a period of 4 $\mathop{.}\limits^{{\rm{d}}}$ 4 still shows an eccentric orbit, while TIC 343757299 with a longer period (5 $\mathop{.}\limits^{{\rm{d}}}$ 8) does not, which poses a challenge to the Kraft break. By plotting these components in the H-R diagram, it hints that all systems are main-sequence (MS) primaries with pre-MS companions. They are valuable targets for testing theories of binary formation and evolution.https://doi.org/10.3847/1538-4357/ade704Close binary starsMultiple starsEclipsing binary stars |
| spellingShingle | Linfeng Chang Shengbang Qian Lei Zang Fuxing Li Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries The Astrophysical Journal Close binary stars Multiple stars Eclipsing binary stars |
| title | Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries |
| title_full | Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries |
| title_fullStr | Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries |
| title_full_unstemmed | Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries |
| title_short | Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries |
| title_sort | detection of four intermediate mass stars with cool companions in low mass ratio eclipsing binaries |
| topic | Close binary stars Multiple stars Eclipsing binary stars |
| url | https://doi.org/10.3847/1538-4357/ade704 |
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