Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation
Radio radiation has been detected across the Hertzsprung Russell diagram. We selected three objects with radio radiation (a semi-detached eclipsing binary V Crt, and two detached binaries WY Cnc and CG Cyg) that show magnetic activity. We made new photometric observations using a SARA 60 cm and NAOC...
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MDPI AG
2022-10-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/8/11/551 |
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| author | Yao Cheng Liyun Zhang Qingfeng Pi Zhongzhong Zhu Xianming L. Han Prabhakar Misra Zilu Yang Baoda Li Linyan Jiang |
| author_facet | Yao Cheng Liyun Zhang Qingfeng Pi Zhongzhong Zhu Xianming L. Han Prabhakar Misra Zilu Yang Baoda Li Linyan Jiang |
| author_sort | Yao Cheng |
| collection | DOAJ |
| description | Radio radiation has been detected across the Hertzsprung Russell diagram. We selected three objects with radio radiation (a semi-detached eclipsing binary V Crt, and two detached binaries WY Cnc and CG Cyg) that show magnetic activity. We made new photometric observations using a SARA 60 cm and NAOC 85 cm optical telescopes. Then, we obtained their orbital and starspot parameters by analyzing our light curves and published radial velocities using the updated Wilson-Devinney program. We revised the ephemeris information for V Crt and WY Cnc by analyzing the orbital minimum times. The orbital periods increased by 2.8 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>2.1</mn></mrow></semantics></math></inline-formula>) ×<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mrow><mo>−</mo><mn>9</mn></mrow></msup></semantics></math></inline-formula> d yr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula> for V Crt, which maybe caused by mass transfer. The orbital periods decreased by −8.641 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>0.004</mn></mrow></semantics></math></inline-formula>) ×<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mrow><mo>−</mo><mn>8</mn></mrow></msup></semantics></math></inline-formula> d yr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula> for WY Cnc. Orbital period change for CG Cyg was also found and we used a third-body of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>M</mi><mn>3</mn></msub></semantics></math></inline-formula> of 0.14 M<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mo>⊙</mo></msub></semantics></math></inline-formula> and a period of approximately 59.20 (0.36) yr to explain that. We also analysed the possible second period oscillation of CG Cyg with a cycle about 18.31 (0.06) yr. The long period changes of WY Cnc and CG Cyg might be caused by magnetic activity or stellar wind, rather than mass transfer. |
| first_indexed | 2024-03-09T18:35:25Z |
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| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T18:35:25Z |
| publishDate | 2022-10-01 |
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| series | Universe |
| spelling | doaj.art-9ea91229461f47e4b8cfd6e8c1bf10d82023-11-24T07:11:50ZengMDPI AGUniverse2218-19972022-10-0181155110.3390/universe8110551Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio RadiationYao Cheng0Liyun Zhang1Qingfeng Pi2Zhongzhong Zhu3Xianming L. Han4Prabhakar Misra5Zilu Yang6Baoda Li7Linyan Jiang8Guizhou Provincial Key Laboratory of Public Big Data, College of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Medicine, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaDepartment of Physics, Astronomy Howard University, Washington, DC 20059, USACollege of Physics, Guizhou University, Guiyang 550025, ChinaCollege of Physics, Guizhou University, Guiyang 550025, ChinaDepartment of Intelligent Engineering, Guiyang Institute of Information Science and Technology, Guiyang 550025, ChinaRadio radiation has been detected across the Hertzsprung Russell diagram. We selected three objects with radio radiation (a semi-detached eclipsing binary V Crt, and two detached binaries WY Cnc and CG Cyg) that show magnetic activity. We made new photometric observations using a SARA 60 cm and NAOC 85 cm optical telescopes. Then, we obtained their orbital and starspot parameters by analyzing our light curves and published radial velocities using the updated Wilson-Devinney program. We revised the ephemeris information for V Crt and WY Cnc by analyzing the orbital minimum times. The orbital periods increased by 2.8 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>2.1</mn></mrow></semantics></math></inline-formula>) ×<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mrow><mo>−</mo><mn>9</mn></mrow></msup></semantics></math></inline-formula> d yr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula> for V Crt, which maybe caused by mass transfer. The orbital periods decreased by −8.641 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>0.004</mn></mrow></semantics></math></inline-formula>) ×<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mrow><mo>−</mo><mn>8</mn></mrow></msup></semantics></math></inline-formula> d yr<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></semantics></math></inline-formula> for WY Cnc. Orbital period change for CG Cyg was also found and we used a third-body of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>M</mi><mn>3</mn></msub></semantics></math></inline-formula> of 0.14 M<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mo>⊙</mo></msub></semantics></math></inline-formula> and a period of approximately 59.20 (0.36) yr to explain that. We also analysed the possible second period oscillation of CG Cyg with a cycle about 18.31 (0.06) yr. The long period changes of WY Cnc and CG Cyg might be caused by magnetic activity or stellar wind, rather than mass transfer.https://www.mdpi.com/2218-1997/8/11/551binaries: eclipsing binarystars: individual (V Crt, WY Cnc, CG Cyg)stars: starspots |
| spellingShingle | Yao Cheng Liyun Zhang Qingfeng Pi Zhongzhong Zhu Xianming L. Han Prabhakar Misra Zilu Yang Baoda Li Linyan Jiang Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation Universe binaries: eclipsing binary stars: individual (V Crt, WY Cnc, CG Cyg) stars: starspots |
| title | Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation |
| title_full | Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation |
| title_fullStr | Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation |
| title_full_unstemmed | Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation |
| title_short | Physical Properties of Three Eclipsing Binaries of V Crt, WY Cnc and CG Cyg with Radio Radiation |
| title_sort | physical properties of three eclipsing binaries of v crt wy cnc and cg cyg with radio radiation |
| topic | binaries: eclipsing binary stars: individual (V Crt, WY Cnc, CG Cyg) stars: starspots |
| url | https://www.mdpi.com/2218-1997/8/11/551 |
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