KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit
We present a comprehensive analysis of a very long-period (124.93669 days) eclipsing binary KIC 9028474, which is composed of F9V+G1V components on a highly eccentric ( e = 0.82029) orbit. Masses and radii of the primary and the secondary components are M _1 = 1.18 ± 0.04 M _⊙ , M _2 = 1.04 ± 0.03 M...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ad004a |
| _version_ | 1797645340982116352 |
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| author | Orkun Özdarcan |
| author_facet | Orkun Özdarcan |
| author_sort | Orkun Özdarcan |
| collection | DOAJ |
| description | We present a comprehensive analysis of a very long-period (124.93669 days) eclipsing binary KIC 9028474, which is composed of F9V+G1V components on a highly eccentric ( e = 0.82029) orbit. Masses and radii of the primary and the secondary components are M _1 = 1.18 ± 0.04 M _⊙ , M _2 = 1.04 ± 0.03 M _⊙ , R _1 = 1.52 ± 0.02 R _⊙ , and R _2 = 1.11 ± 0.01 R _⊙ , respectively. Eclipse time variations show the presence of apsidal motion, which in turn shows the existence of a third body in a relatively close orbit. Simultaneous analysis of infrared spectra and space photometry reveals that the primary component is about to leave the main sequence, indicating an age of 5.2 ± 0.8 Gyr for the system. Theoretical evaluation of the observed eccentricity indicates that the components of KIC 9028474 will end their whole life much before the orbital circularization is achieved. Given the limited resolution of the spectra, we can only place an upper limit on the rotational velocities of each star, thus a theoretical evaluation of the synchronization of the components. |
| first_indexed | 2024-03-11T14:44:55Z |
| format | Article |
| id | doaj.art-00f8f581afb445cba81cdbd643353fc9 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-11T14:44:55Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-00f8f581afb445cba81cdbd643353fc92023-10-30T11:51:19ZengIOP PublishingThe Astronomical Journal1538-38812023-01-01166521510.3847/1538-3881/ad004aKIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric OrbitOrkun Özdarcan0https://orcid.org/0000-0003-4820-3950Department of Astronomy and Space Sciences, Faculty of Science, Ege University , 35100 İzmir, Turkey ; orkun.ozdarcan@ege.edu.trWe present a comprehensive analysis of a very long-period (124.93669 days) eclipsing binary KIC 9028474, which is composed of F9V+G1V components on a highly eccentric ( e = 0.82029) orbit. Masses and radii of the primary and the secondary components are M _1 = 1.18 ± 0.04 M _⊙ , M _2 = 1.04 ± 0.03 M _⊙ , R _1 = 1.52 ± 0.02 R _⊙ , and R _2 = 1.11 ± 0.01 R _⊙ , respectively. Eclipse time variations show the presence of apsidal motion, which in turn shows the existence of a third body in a relatively close orbit. Simultaneous analysis of infrared spectra and space photometry reveals that the primary component is about to leave the main sequence, indicating an age of 5.2 ± 0.8 Gyr for the system. Theoretical evaluation of the observed eccentricity indicates that the components of KIC 9028474 will end their whole life much before the orbital circularization is achieved. Given the limited resolution of the spectra, we can only place an upper limit on the rotational velocities of each star, thus a theoretical evaluation of the synchronization of the components.https://doi.org/10.3847/1538-3881/ad004aEclipsing binary starsDetached binary starsFundamental parameters of starsEccentricity |
| spellingShingle | Orkun Özdarcan KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit The Astronomical Journal Eclipsing binary stars Detached binary stars Fundamental parameters of stars Eccentricity |
| title | KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit |
| title_full | KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit |
| title_fullStr | KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit |
| title_full_unstemmed | KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit |
| title_short | KIC 9028474: A Long-period Eclipsing Binary on a Highly Eccentric Orbit |
| title_sort | kic 9028474 a long period eclipsing binary on a highly eccentric orbit |
| topic | Eclipsing binary stars Detached binary stars Fundamental parameters of stars Eccentricity |
| url | https://doi.org/10.3847/1538-3881/ad004a |
| work_keys_str_mv | AT orkunozdarcan kic9028474alongperiodeclipsingbinaryonahighlyeccentricorbit |