Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Hernandez, F. Perez"'
Autor:
Knudstrup, E., Lund, M. N., Andersen, M. Fredslund, Rørsted, J. L., Hernández, F. Pérez, Grundahl, F., Pallé, P. L., Stello, D., White, T. R., Kjeldsen, H., Vrard, M., Winther, M. L., Handberg, R., Simón-Díaz, S.
Publikováno v:
A&A 675, A197 (2023)
Fundamental stellar parameters such as mass and radius are some of the most important building blocks in astronomy, both when it comes to understanding the star itself and when deriving the properties of any exoplanet(s) they may host. Asteroseismolo
Externí odkaz:
http://arxiv.org/abs/2306.09769
Multi-campaign Asteroseismic Analysis of eight Solar-like pulsating stars observed by the K2 mission
Autor:
González-Cuesta, L., Mathur, S., García, R. A., Hernández, F. Pérez, Delsanti, V., Breton, S. N., Hedges, C., Jiménez, A., Della Gaspera, A., El-Issami, M., Fox, V., Godoy-Rivera, D., Pitot, S., Proust, N.
Publikováno v:
A&A 674, A106 (2023)
The NASA K2 mission that succeeded the nominal Kepler mission observed several hundreds of thousands of stars during its operations. While most of the stars were observed in single campaigns of 80 days, some of them were targeted for more than one ca
Externí odkaz:
http://arxiv.org/abs/2304.00087
Autor:
Smith, A. M. S., Breton, S. N., Csizmadia, Sz., Dai, F., Gandolfi, D., García, R. A., Howard, A. W., Isaacson, H., Korth, J., Lam, K. W. F., Mathur, S., Nowak, G., Hernández, F. Pérez, Persson, C. M., Albrecht, S. H., Barragán, O., Cabrera, J., Cochran, W. D., Deeg, H. J., Fridlund, M., Georgieva, I. Y., Goffo, E., Guenther, E. W., Hatzes, A. P., Kabath, P., Livingston, J. H., Luque, R., Palle, E., Redfield, S., Rodler, F., Serrano, L. M., Van Eylen, V.
Publikováno v:
MNRAS 2022, 510, 5035
We report new photometric and spectroscopic observations of the K2-99 planetary system. Asteroseismic analysis of the short-cadence light curve from K2's Campaign 17 allows us to refine the stellar properties. We find K2-99 to be significantly smalle
Externí odkaz:
http://arxiv.org/abs/2111.14660
Magnetic activity changes the gravito-acoustic modes of solar-like stars and in particular their frequencies. There is an angular-degree dependence that is believed to be caused by the non-spherical nature of the magnetic activity in the stellar conv
Externí odkaz:
http://arxiv.org/abs/1906.10569
Autor:
Van Eylen, V., Dai, F., Mathur, S., Gandolfi, D., Albrecht, S., Fridlund, M., García, R. A., Guenther, E., Hjorth, M., Justesen, A. B., Livingston, J., Lund, M. N., Hernández, F. Pérez, Prieto-Arranz, J., Regulo, C., Bugnet, L., Everett, M. E., Hirano, T., Nespral, D., Nowak, G., Palle, E., Aguirre, V. Silva, Trifonov, T., Winn, J. N., Barragán, O., Beck, P. G., Chaplin, W. J., Cochran, W. D., Csizmadia, S., Deeg, H., Endl, M., Heeren, P., Grziwa, S., Hatzes, A. P., Hidalgo, D., Korth, J., Mathis, S., Rodriguez, P. Montañes, Narita, N., Patzold, M., Persson, C. M., Rodler, F., Smith, A. M. S.
We report the discovery and characterization of HD 89345b (K2-234b; EPIC 248777106b), a Saturn-sized planet orbiting a slightly evolved star. HD 89345 is a bright star ($V = 9.3$ mag) observed by the K2 mission with one-minute time sampling. It exhib
Externí odkaz:
http://arxiv.org/abs/1805.01860
Publikováno v:
A&A 611, A84 (2018)
The variations of the frequencies of the low-degree acoustic oscillations in the Sun induced by magnetic activity show a dependence with radial order. The frequency shifts are observed to increase towards higher-order modes to reach a maximum of abou
Externí odkaz:
http://arxiv.org/abs/1712.05691
Autor:
Salabert, D., Garcia, R. A., Beck, P. G., Regulo, C., Ballot, J., Creevey, O. L., Egeland, R., Nascimento Jr., J. -D. do, Hernandez, F. Perez, Bigot, L., Mathur, S., Metcalfe, T. S., Corsaro, E., Palle, P. L.
Finding solar-analog stars with fundamental properties as close as possible to the Sun and studying the characteristics of their surface magnetic activity is a very promising way to understand the solar variability and its associated dynamo process.
Externí odkaz:
http://arxiv.org/abs/1610.00990
Publikováno v:
A&A 591, A99 (2016)
Frequencies of acoustic and mixed modes in red giant stars are now determined with high precision thanks to the long continuous observations provided by the NASA Kepler mission. Here we consider the eigenfrequencies of nineteen low-luminosity red gia
Externí odkaz:
http://arxiv.org/abs/1605.01567
Autor:
Salabert, D., Regulo, C., Garcia, R. A., Beck, P. G., Ballot, J., Creevey, O. L., Hernandez, F. Perez, Nascimento Jr., J. D. do, Corsaro, E., Egeland, R., Mathur, S., Metcalfe, T. S., Bigot, L., Cellier, T., Palle, P. L.
Publikováno v:
A&A 589, A118 (2016)
The continuous photometric observations collected by the Kepler satellite over 4 years provide a whelm of data with an unequalled quantity and quality for the study of stellar evolution of more than 200000 stars. Moreover, the length of the dataset p
Externí odkaz:
http://arxiv.org/abs/1603.00655
Gravito-acoustic modes in the Sun and other stars propagate in resonant cavities with a frequency below a given limit known as the cut-off frequency. At higher frequencies, waves are no longer trapped in the stellar interior and become traveller wave
Externí odkaz:
http://arxiv.org/abs/1508.04910