Monitoring of transiting exoplanets and their host stars with small aperture telescopes
نویسندگان
چکیده
Exoplanet research is now target rich with a wide diversity of systems making it difficult for high demand observatories to undertake follow up observations over extended periods time. We investigate the effectiveness using 0.4m-class telescopes monitoring transiting hot Jupiters and their host stars. consider two representative case studies: WASP-52b 13 new transits, HAT-P-23b 17 transits concurrent photometric covering 78 days. present updated system parameters combine our transit times previously published results calculate ephemerides both systems. Our analysis mid-times in slight preference quadratic ephemeris ($\Delta\chi_{\nu}^2 = 0.07$, $\Delta BIC 1.53$ linear ephemeris. discuss reality this indicating period change $ \delta P / t -38.6\pm4{\rm ms~yr^{-1}}$ possible causes. WASP-52 known be an active star previous publications reporting many spot crossing events, however no such events are seen photometry. shows that still latitude spots has likely migrated away from chord. confirm inflated nature circular orbit HAT-P-23b. HAT-P-23 reveals periodicity 7.015 days amplitude 0.011 mag which we interpret as rotation HAT-P-23. The timing precision achieved studies class telescope capable precise characterisation long-term support dedicated ongoing future ground space based observations.
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ژورنال
عنوان ژورنال: New Astronomy
سال: 2021
ISSN: ['1384-1076', '1384-1092']
DOI: https://doi.org/10.1016/j.newast.2020.101477