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http://hdl.handle.net/20.500.12386/32320
Titolo: | The ultra-hot-Jupiter KELT-16 b: dynamical evolution and atmospheric properties | Autori: | Mancini, L. Southworth, J. Naponiello, L. Baştürk, Ö. Barbato, D. Biagiotti, F. BRUNI, IVAN Cabona, L. D'Ago, G. Damasso, Mario Erdem, A. Evans, D. Henning, Th Öztürk, O. RICCI, DAVIDE SOZZETTI, Alessandro Tregloan-Reed, J. Yalçınkaya, S. |
Data pubblicazione: | 2022 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 509 | Fascicolo: | 1 | Da pagina:: | 1447 | Abstract: | We present broad-band photometry of 30 planetary transits of the ultra-hot-Jupiter KELT-16 b, using five medium-class telescopes. The transits were monitored through standard $B,\, V,\, R,\, I$ filters and four were simultaneously observed from different places, for a total of 36 new light curves. We used these new photometric data and those from the TESS space telescope to review the main physical properties of the KELT-16 planetary system. Our results agree with previous measurements but are more precise. We estimated the mid-transit times for each of these transits and combined them with others from the literature to obtain 69 epochs, with a time baseline extending over more than 4 yr, and searched for transit time variations. We found no evidence for a period change, suggesting a lower limit for orbital decay at 8 Myr, with a lower limit on the reduced tidal quality factor of $Q^{\prime }_{\star }\gt (1.9 \pm 0.8) \times 10^5$ with $95{{\ \rm per\ cent}}$ confidence. We built up an observational, low-resolution transmission spectrum of the planet, finding evidence of the presence of optical absorbers, although with a low significance. Using TESS data, we reconstructed the phase curve finding that KELT-16 b has a phase offset of 25.25 ± 14.03 °E, a day- and night-side brightness temperature of 3190 ± 61 K and 2668 ± 56 K, respectively. Finally, we compared the flux ratio of the planet over its star at the TESS and Spitzer wavelengths with theoretical emission spectra, finding evidence of a temperature inversion in the planet's atmosphere, the chemical composition of which is preferably oxygen-rich rather than carbon-rich. | URI: | http://hdl.handle.net/20.500.12386/32320 | URL: | https://academic.oup.com/mnras/article/509/1/1447/6373473?login=true http://arxiv.org/abs/2105.00889v3 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab2691 | Bibcode ADS: | 2022MNRAS.509.1447M | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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