HAT-P-54b: A hot jupiter transiting a 0.64 Msun star in field 0 of the K2 mission
| Autor: | Bakos, G. Á., Hartman, J. D., Bhatti, W., Bieryla, A., de Val-Borro, M., Latham, D. W., Buchhave, L. A., Csubry, Z., Penev, K., Kovács, G., Béky, B., Falco, E., Kovács, T., Howard, A. W., Johnson, J. A., Isaacson, H., Marcy, G. W., Torres, G., Noyes, R. W., Berlind, P., Calkins, M. L., Esquerdo, G. A., Lázár, J., Papp, I., Sári, P. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0004-6256/149/4/149 |
| Popis: | We report the discovery of HAT-P-54b, a planet transiting a late K dwarf star in field 0 of the NASA K2 mission. We combine ground-based photometric light curves with radial velocity measurements to determine the physical parameters of the system. HAT-P-54b has a mass of 0.760 $\pm$ 0.032 $M_J$, a radius of 0.944 $\pm$ 0.028 $R_J$, and an orbital period of 3.7998 d. The star has V = 13.505 $\pm$ 0.060, a mass of 0.645 $\pm$ 0.020 $M_{\odot}$, a radius of 0.617 $\pm$ 0.013 $R_{\odot}$, an effective temperature of Teff = 4390 $\pm$ 50K, and a subsolar metallicity of [Fe/H] = -0.127 $\pm$ 0.080. HAT-P-54b has a radius that is smaller than 92% of the known transiting planets with masses greater than that of Saturn, while HAT-P-54 is one of the lowest-mass stars known to host a hot Jupiter. Follow-up high-precision photometric observations by the K2 mission promise to make this a well-studied planetary system. Comment: Submitted to AJ 2014 April 16 |
| Databáze: | arXiv |
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