FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations
We present a detailed analysis of an eclipsing double-lined binary FX UMa based on TESS photometry and newly acquired spectroscopic observations. The radial velocities and atmospheric parameters for each component star are obtained from the SONG high-resolution spectra. Combined with the radial-velo...
| 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 Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/acdac9 |
| _version_ | 1797698381401817088 |
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| author | Kun Wang Anbing Ren Mads Fredslund Andersen Frank Grundahl Tao Chen Pere L. Pallé |
| author_facet | Kun Wang Anbing Ren Mads Fredslund Andersen Frank Grundahl Tao Chen Pere L. Pallé |
| author_sort | Kun Wang |
| collection | DOAJ |
| description | We present a detailed analysis of an eclipsing double-lined binary FX UMa based on TESS photometry and newly acquired spectroscopic observations. The radial velocities and atmospheric parameters for each component star are obtained from the SONG high-resolution spectra. Combined with the radial-velocity measurements, our light-curve modeling yields absolute masses and radii of the two components. The Fourier amplitude spectrum of the residual light curve reveals a total of 103 frequencies with signal-to-noise ratio (S/N) ≥ 4, including 12 independent frequencies, 17 multiples of the orbital frequency ( Nf _orb ), and 74 combination frequencies. Ten Nf _orb peaks with S/N > 10 have very high amplitudes and are likely due to tidally excited oscillations (TEOs). The remaining Nf _orb peaks (4 ≤ S/N ≤ 10) may be originated from the imperfect removal, or they are actually real TEOs. Four anharmonic frequencies can pair up and sum to give exact harmonics of the orbital frequency, suggesting the existence of nonlinear tidal processes in the eccentric binary system FX UMa. Eight independent frequencies in the range of 20–32 day ^−1 are typical low-order pressure modes of δ Scuti pulsators. |
| first_indexed | 2024-03-12T03:53:13Z |
| format | Article |
| id | doaj.art-1ec12bf27ad449e19be9175d63dabd91 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:53:13Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-1ec12bf27ad449e19be9175d63dabd912023-09-03T12:08:04ZengIOP PublishingThe Astronomical Journal1538-38812023-01-0116624210.3847/1538-3881/acdac9FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct PulsationsKun Wang0https://orcid.org/0000-0002-5745-827XAnbing Ren1Mads Fredslund Andersen2Frank Grundahl3https://orcid.org/0000-0002-8736-1639Tao Chen4Pere L. Pallé5https://orcid.org/0000-0003-3803-4823School of Physics and Astronomy, China West Normal University , Nanchong 637009, People’s Republic of China ; kwang@cwnu.edu.cnSchool of Physics and Astronomy, China West Normal University , Nanchong 637009, People’s Republic of China ; kwang@cwnu.edu.cnStellar Astrophysics Centre, Aarhus University , DK-8000 Aarhus C, DenmarkStellar Astrophysics Centre, Aarhus University , DK-8000 Aarhus C, DenmarkSchool of Physics and Astronomy, China West Normal University , Nanchong 637009, People’s Republic of China ; kwang@cwnu.edu.cnInstituto de Astrofísica de Canarias. E-38205 La Laguna, Tenerife, Spain; Universidad de La Laguna (ULL) , Departamento de Astrofísica, E-38206 La Laguna, Tenerife, SpainWe present a detailed analysis of an eclipsing double-lined binary FX UMa based on TESS photometry and newly acquired spectroscopic observations. The radial velocities and atmospheric parameters for each component star are obtained from the SONG high-resolution spectra. Combined with the radial-velocity measurements, our light-curve modeling yields absolute masses and radii of the two components. The Fourier amplitude spectrum of the residual light curve reveals a total of 103 frequencies with signal-to-noise ratio (S/N) ≥ 4, including 12 independent frequencies, 17 multiples of the orbital frequency ( Nf _orb ), and 74 combination frequencies. Ten Nf _orb peaks with S/N > 10 have very high amplitudes and are likely due to tidally excited oscillations (TEOs). The remaining Nf _orb peaks (4 ≤ S/N ≤ 10) may be originated from the imperfect removal, or they are actually real TEOs. Four anharmonic frequencies can pair up and sum to give exact harmonics of the orbital frequency, suggesting the existence of nonlinear tidal processes in the eccentric binary system FX UMa. Eight independent frequencies in the range of 20–32 day ^−1 are typical low-order pressure modes of δ Scuti pulsators.https://doi.org/10.3847/1538-3881/acdac9Eclipsing binary starsPulsating variable stars |
| spellingShingle | Kun Wang Anbing Ren Mads Fredslund Andersen Frank Grundahl Tao Chen Pere L. Pallé FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations The Astronomical Journal Eclipsing binary stars Pulsating variable stars |
| title | FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations |
| title_full | FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations |
| title_fullStr | FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations |
| title_full_unstemmed | FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations |
| title_short | FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations |
| title_sort | fx uma a new heartbeat binary system with linear and nonlinear tidal oscillations and δ sct pulsations |
| topic | Eclipsing binary stars Pulsating variable stars |
| url | https://doi.org/10.3847/1538-3881/acdac9 |
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