The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b
English
Winn, Joshua N[Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Holman, Matthew J[Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA]
Bakos, Gaspar Á[Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA ; Hubble Fellow]
Pál, András[Department of Astronomy, Eötvös Loránd University, Pf. 32, H-1518 Budapest, Hungary]
Johnson, John Asher[Department of Astronomy, University of California, Mail Code 3411, Berkeley, CA 94720, USA]
Williams, Peter K G[Department of Astronomy, University of California, Mail Code 3411, Berkeley, CA 94720, USA]
Shporer, Avi[Wise Observatory, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
Mazeh, Tsevi[Wise Observatory, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
Fernandez, José[Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA ; Department of Astronomy, Pontificia Universidad Católica, Casilla 306, Santiago 22, Chile]
Latham, David W[Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA]
Gillon, Michaël[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
[en] We present photometry of the G0 star HAT-P-1 during six transits of its close-in giant planet, and we refine the estimates of the system parameters. Relative to Jupiter's properties, HAT-P-1b is 1.20 ± 0.05 times larger, and its surface gravity is 2.7 ± 0.2 times weaker. Although it remains the case that HAT-P-1b is among the least dense of the known sample of transiting exoplanets, its properties are in accord with previously published models of strongly irradiated, coreless, solar-composition giant planets. The times of the transits have a typical accuracy of 1 minute and do not depart significantly from a constant period.
[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
