Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS
The detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region. The phase modulation and the frequency modulation caused by the light travel effect make it possible to find such systems that are hard...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/acb056 |
| _version_ | 1827827803040514048 |
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| author | Xin Lyu Ming Yang |
| author_facet | Xin Lyu Ming Yang |
| author_sort | Xin Lyu |
| collection | DOAJ |
| description | The detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region. The phase modulation and the frequency modulation caused by the light travel effect make it possible to find such systems that are hard to be detected by other methods. In this paper, we combined Kepler and TESS data to extend the observation span to more than 12 yr. Time-frequency analysis was applied on some δ Scuti variables observed by both Kepler and TESS. After careful phase modulation analysis, we succeeded in detecting a binary system with an orbital period as long as 3924 days. The 525 s light travel time along the line of sight indicates that the hidden companion of KIC 3440495 is a stellar object. To date, it is the longest-period binary confirmed by the phase modulation method. The method described in this article can be applied to more Kepler and TESS pulsating variables in the future. |
| first_indexed | 2024-03-12T03:36:40Z |
| format | Article |
| id | doaj.art-5d46be331cff477b9088e76a2431fad9 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T03:36:40Z |
| publishDate | 2023-01-01 |
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| series | The Astrophysical Journal Letters |
| spelling | doaj.art-5d46be331cff477b9088e76a2431fad92023-09-03T13:08:52ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019431L710.3847/2041-8213/acb056Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESSXin Lyu0https://orcid.org/0000-0001-8550-0095Ming Yang1https://orcid.org/0000-0002-6926-2872National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China; University of Chinese Academy of Sciences , Beijing 100049, People's Republic of ChinaCollege of Surveying and Geo-Informatics, Tongji University , Shanghai 200092, People's Republic of China ; ming.yang@nju.edu.cnThe detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region. The phase modulation and the frequency modulation caused by the light travel effect make it possible to find such systems that are hard to be detected by other methods. In this paper, we combined Kepler and TESS data to extend the observation span to more than 12 yr. Time-frequency analysis was applied on some δ Scuti variables observed by both Kepler and TESS. After careful phase modulation analysis, we succeeded in detecting a binary system with an orbital period as long as 3924 days. The 525 s light travel time along the line of sight indicates that the hidden companion of KIC 3440495 is a stellar object. To date, it is the longest-period binary confirmed by the phase modulation method. The method described in this article can be applied to more Kepler and TESS pulsating variables in the future.https://doi.org/10.3847/2041-8213/acb056Binary starsStellar oscillationsFundamental parameters of starsDelta Scuti variable starsPhotometry |
| spellingShingle | Xin Lyu Ming Yang Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS The Astrophysical Journal Letters Binary stars Stellar oscillations Fundamental parameters of stars Delta Scuti variable stars Photometry |
| title | Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS |
| title_full | Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS |
| title_fullStr | Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS |
| title_full_unstemmed | Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS |
| title_short | Hidden Companions Detected by Asteroseismology. II. A Long-period Noneclipsing Binary System Revealed by Kepler and TESS |
| title_sort | hidden companions detected by asteroseismology ii a long period noneclipsing binary system revealed by kepler and tess |
| topic | Binary stars Stellar oscillations Fundamental parameters of stars Delta Scuti variable stars Photometry |
| url | https://doi.org/10.3847/2041-8213/acb056 |
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