A Refined Orbital Ephemeris for the Intermediate Polar FO Aquarii and Evidence for a Period Derivative
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912609405501440 |
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| author | Garnavich, Peter Tweddale, Jordan Littlefield, Colin |
| author_facet | Garnavich, Peter Tweddale, Jordan Littlefield, Colin |
| contents | We combine more than 40 years of eclipse timings of the intermediate polar FO Aqr and derive new orbital ephemerides. The eclipse times are best fit with a second order polynomial, implying an $8σ$ detection of a period derivative. The results show that the orbital period of FO Aqr is currently increasing, with a derivative of $\dot{P}=6.65\pm0.81\times10^{-11}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_22786 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Refined Orbital Ephemeris for the Intermediate Polar FO Aquarii and Evidence for a Period Derivative Garnavich, Peter Tweddale, Jordan Littlefield, Colin Solar and Stellar Astrophysics We combine more than 40 years of eclipse timings of the intermediate polar FO Aqr and derive new orbital ephemerides. The eclipse times are best fit with a second order polynomial, implying an $8σ$ detection of a period derivative. The results show that the orbital period of FO Aqr is currently increasing, with a derivative of $\dot{P}=6.65\pm0.81\times10^{-11}$. |
| title | A Refined Orbital Ephemeris for the Intermediate Polar FO Aquarii and Evidence for a Period Derivative |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2509.22786 |