Browsing by Author "Damasso, M."

Now showing 1 - 3 of 3
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    Rotation periods and astrometric motions of the Luhman 16AB brown dwarfs by high-resolution lucky-imaging monitoring
    (2015) Mancini, L.; Giacobbe, P.; Littlefair, S. P.; Southworth, J.; Bozza, V.; Damasso, M.; Dominik, M.; Hundertmark, M.; Jorgensen, U. G.; Rabus, Markus
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    The ultra-hot-Jupiter KELT-16 b: dynamical evolution and atmospheric properties
    (2022) Mancini, L.; Southworth, J.; Naponiello, L.; Basturk, O.; Barbato, D.; Biagiotti, F.; Bruni, I; Cabona, L.; D'Ago, G.; Damasso, M.; Erdem, A.; Evans, D.; Henning, Th; Ozturk, O.; Ricci, D.; Sozzetti, A.; Tregloan-Reed, J.; Yalcinkaya, S.
    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 ICELT-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(*)' > (1.9 +/- 0.8) x 10(5) with 95 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 degrees 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.
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    Two Transiting Hot Jupiters from the WASP Survey : WASP-150b and WASP-176b
    (2020) Cooke, B. F.; Pollacco, D.; Almleaky, Y.; Barkaoui, K.; Benkhaldoun, Z.; Blake, J. A.; Bouchy, F.; Boumis, P.; Brown, D. J. A.; D’Ago, Giuseppe; Bruni, I.; Burdanov, A.; Cameron, A. C.; Chote, P.; Daassou, A.; Dalal, S.; Damasso, M.; Delrez, L.; Doyle, A. P.; Ducrot, E.; Gillon, M.; Hebrard, G.; Hellier, C.; Henning, T.; Jehin, E.; Kiefer, F.; King, G. W.; Liakos, A.; Lopez, T.; Mancini, L.; Mardling, R.; Maxted, P. F. L.; McCormac, J.; Murray, C.; Nielsen, L. D.; Osborn, H.; Palle, E.; Pepe, F.; Pozuelos, F. J.; Prieto-Arranz, J.; Queloz, D.; Schanche, N.; Segransan, D.; Smalley, B.; Southworth, J.; Thompson, S.; Turner, O.; Udry, S.; Velasco, S.; West, R.; Wheatley, P