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WASP-18b Secondary Eclipses Revisited Using TESS Observation

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Astrophysics Aims and scope

We report the characterization of a transiting hot Jupiter WASP-18b at optical wavelengths measured by the transiting exoplanet survey satellite (TESS). We analyze the publicly available data collected by the TESS in sector 2. Here, we model the systematic noise using Gaussian processes (GPs) and fit it to the data using the Markov Chain Monte Carlo (MCMC) method. Modelling the TESS light curve returns a planet-to-star radius ratio, \( p={0.098010}_{-0.000346}^{+0.000368} \) and secondary eclipse depth of \( {354}_{-10}^{+11} \) part-per-million (ppm). The transit ephemeris of WASP-18b is updated using the MCMC method. Finally, we use updated ephemeris to look for transit time variations (TTVs) for WASP-18b to complement our study. We find a quite small deviation of transit timings from a linear ephemeris, which is statistically insignificant.

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References

  1. M. Mayor, and D. Queloz, Nature, 378, 355, 1995. https://doi.org/10.1038/378355a0.

    Article  ADS  Google Scholar 

  2. G. Bakos, R. W. Noyes, Kovács et al., Publ. Astron. Soc. Pacif., 116, 266, 2004. https://doi.org/10.1086/382735.

    Article  ADS  Google Scholar 

  3. D. L. Pollacco, I. Skillen, A. Collier Cameron et al., Publ. Astron. Soc. Pacif., 118, 1407, 2006. https://doi.org/10.1086/508556.

    Article  ADS  Google Scholar 

  4. J. Pepper, R. W. Pogge, D. L. DePoy et al., Publ. Astron. Soc. Pacif., 119, 923, 2007. https://doi.org/10.1086/521836.

    Article  ADS  Google Scholar 

  5. J. Pepper, R. B. Kuhn, R. Siverd et al., Publ. Astron. Soc. Pacif., 124, 230, 2012. https://doi.org/10.1086/665044.

    Article  ADS  Google Scholar 

  6. P. J. Wheatley, R. G. West, and M. R. Goad, Mon. Not. Roy. Astron. Soc., 475(4), 4476, 2018. https://doi.org/10.1093/mnras/stx2836.

    Article  ADS  Google Scholar 

  7. ESA Special Publication, vol. 1306, 2006.

  8. W. J. Borucki, D. Koch, G. Basri et al., Science, 327, 977, 2010. https://doi.org/10.1126/science.1185402.

    Article  ADS  Google Scholar 

  9. S. B. Howell, C. Sobeck, M. Haas et al., Publ. Astron. Soc. Pacif., 126(938), 398, 2014. https://doi.org/10.1086/676406.

    Article  ADS  Google Scholar 

  10. G. R. Ricker, J. N. Winn, R. Vanderspek et al., Journal of Astronomical Telescopes, Instruments, and Systems, 1, 014003, 2015. https://doi.org/10.1117/1.JATIS.1.1.014003.

    Article  ADS  Google Scholar 

  11. I. Wong, A. Shporer, T. Daylan et al., Astron. J., 160, 155, 2020. https://doi.org/10.3847/1538-3881/ababad.

    Article  ADS  Google Scholar 

  12. C. Hellier, D. R. Anderson, Collier Cameron et al., Nature, 460, 1098, 2009. https://doi.org/10.1038/nature0824510. 1038/nature08245.

  13. A. Shporer, I. Wong, C. X. Huang et al., Astron. J., 157(5), 178, 2019. https://doi.org/10.3847/1538-3881/ab0f96.

    Article  ADS  Google Scholar 

  14. T. Mazeh, EAS Publ. Ser., 29, 1, 2008. https://doi.org/10.1051/eas:0829001.

    Article  Google Scholar 

  15. G. Maciejewski, M. Fernández, F. Aceituno et al., Acta Astronomica, 68, 371, 2018. https://doi.org/10.32023/0001-5237/68.4.4.

    Article  ADS  Google Scholar 

  16. M. Oshagh, N. C. Santos, and I. Boisse, Astron. Astrophys., 556, 19, 2013. https://doi.org/10.1051/0004-6361/201321309.

    Article  Google Scholar 

  17. J. M. Jenkins, Kepler Data Processing Handbook: Overview of the Science Operations Center. Kepler Science Document KSCI-19081-002, 2017.

  18. J. C. Smith, M. C. Stumpe, J. E. Van Cleve et al., Publ. Astron. Soc. Pacif., 124, 1000, 2012. https://doi.org/10.1086/667697.

    Article  ADS  Google Scholar 

  19. M. C. Stumpe, J. C. Smith, J. H. Catanzarite et al., Publ. Astron. Soc. Pacif., 126 (935), 100, 2014. https://doi.org/10.1086/674989.

    Article  ADS  Google Scholar 

  20. M. Hippke, T. J. David, G. D. Mulders et al., Astron. J., 158(4),143, 2019. https://doi.org/10.3847/1538-3881/ab3984.

    Article  ADS  Google Scholar 

  21. N. Espinoza, D. Kossakowski, and R. Brahm, Mon. Not. Roy. Astron. Soc., 490, 2262, 2019. https://doi.org/10.1093/mnras/stz2688.

    Article  ADS  Google Scholar 

  22. L. Kreidberg, Publ. Astron. Soc. Pacif., 127, 1161, 2015. https://doi.org/10.1086/683602.

    Article  ADS  Google Scholar 

  23. D. Foreman-Mackey, E. Agol, R. Angus et al., Astron. J., 154, 220, 2017. https://doi.org/10.3847/1538-3881/aa9332.

    Article  ADS  Google Scholar 

  24. C. von Essen, M. Mallonn, and N. B. Cowan, arXiv e-prints, 2006-09750, 2020.

  25. N. Espinoza, Research Not. American Astron. Soc., 2, 209, 2018. https://doi.org/10.3847/2515-5172/aaef38.

    Article  ADS  Google Scholar 

  26. D. M. Kipping, Mon. Not. Roy. Astron. Soc., 435, 2152, 2013. https://doi.org/10.1093/mnras/stt1435.

    Article  ADS  Google Scholar 

  27. J. S. Speagle, Mon. Not. Roy. Astron. Soc., 493, 3132, 2020. https://doi.org/10.1093/mnras/staa278.

    Article  ADS  Google Scholar 

  28. J. Skilling, In: AIP Conference Proceedings, 735, 395, 2004. https://doi.org/10.1063/1.1835238.

    Article  ADS  MathSciNet  Google Scholar 

  29. K. F. Huber, S. Czesla, and J. H. M. M. Schmitt, Astron. Astrophys., 597, A113, 2017. https://doi.org/10.1051/0004-6361/201629699.

    Article  ADS  Google Scholar 

  30. M. J. Holman and N. W. Murray, Science, 307 (5713), 1288, 2005. https://doi.org/10.1126/science.1107822.

    Article  ADS  Google Scholar 

  31. M. Zechmeister and M. Kürster, Astron. Astrophys., 496, 577, 2009. https://doi.org/10.1051/0004-6361:200811296.

    Article  ADS  Google Scholar 

  32. J. -P. A. Zoghbi, Publ. Astron. Soc. Australia, 28(3), 177, 2011. https://doi.org/10.1071/AS09062.

    Article  ADS  Google Scholar 

  33. A. Claret, Astron. Astrophys., 600, A30, 2017. https://doi.org/10.1051/0004-6361/201629705.

    Article  ADS  Google Scholar 

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, University of Zanjan, P. O. Box 313-45195, Zanjan, Iran

    M. Eftekhar

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  1. M. Eftekhar
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Correspondence to M. Eftekhar.

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Published in Astrofizika, Vol. 65, No. 3, pp. 428-442 (August 2022).

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Eftekhar, M. WASP-18b Secondary Eclipses Revisited Using TESS Observation. Astrophysics 65, 414–426 (2022). https://doi.org/10.1007/s10511-022-09750-2

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  • DOI: https://doi.org/10.1007/s10511-022-09750-2

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