Zobrazeno 1 - 10
of 1 231
pro vyhledávání: '"Kjeldsen, H."'
Autor:
Campante, T. L., Kjeldsen, H., Li, Y., Lund, M. N., Silva, A. M., Corsaro, E., da Silva, J. Gomes, Martins, J. H. C., Adibekyan, V., Silva, T. Azevedo, Bedding, T. R., Bossini, D., Buzasi, D. L., Chaplin, W. J., Costa, R. R., Cunha, M. S., Cristo, E., Faria, J. P., García, R. A., Huber, D., Lundkvist, M. S., Metcalfe, T. S., Monteiro, M. J. P. F. G., Neitzel, A. W., Nielsen, M. B., Poretti, E., Santos, N. C., Sousa, S. G.
Publikováno v:
A&A, 683, L16 (2024)
Fuelled by space photometry, asteroseismology is vastly benefitting the study of cool main-sequence stars, which exhibit convection-driven solar-like oscillations. Even so, the tiny oscillation amplitudes in K dwarfs continue to pose a challenge to s
Externí odkaz:
http://arxiv.org/abs/2403.16333
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
Autor:
Tautvaišienė, G., Mikolaitis, Š., Drazdauskas, A., Stonkutė, E., Minkevičiūtė, R., Pakštienė, E., Kjeldsen, H., Brogaard, K., Chorniy, Y., von Essen, C., Grundahl, F., Ambrosch, M., Bagdonas, V., Sharma, A., Vázquez, C. Viscasillas
In fulfilling the aims of the planetary and asteroseismic research missions, such as that of the NASA Transiting Exoplanet Survey Satellite (TESS) space telescope, accurate stellar atmospheric parameters and a detailed chemical composition are requir
Externí odkaz:
http://arxiv.org/abs/2202.10102
Autor:
Breton, S. N., Pallé, P. L., García, R. A., Andersen, M. Fredslund, Grundahl, F., Christensen-Dalsgaard, J., Kjeldsen, H., Mathur, S.
Publikováno v:
A&A 658, A27 (2022)
The GOLF instrument on board SoHO has been in operation for almost 25 years but aging of the instrument has now strongly affected its performance, especially in the low-frequency p-mode region. At the end of the SoHO mission, the ground-based network
Externí odkaz:
http://arxiv.org/abs/2110.12698
Autor:
Plachy, E., Pál, A., Bódi, A., Szabó, P., Molnár, L., Szabados, L., Benkő, J. M., Anderson, R. I., Bellinger, E. P., Bhardwaj, A., Ebadi, M., Gazeas, K., Hambsch, F. -J., Hasanzadeh, A., Jurkovic, M. I., Kalaee, M. J., Kervella, P., Kolenberg, K., Mikołajczyk, P., Nardetto, N., Nemec, J. M., Netzel, H., Ngeow, C. -C., Ozuyar, D., Pascual-Granado, J., Pilecki, B., Ripepi, V., Skarka, M., Smolec, R., Sódor, Á., Szabó, R., Christensen-Dalsgaard, J., Jenkins, J. M., Kjeldsen, H., Ricker, G. R., Vanderspek, R.
We present the first analysis of Cepheid stars observed by the TESS space mission in Sectors 1 to 5. Our sample consists of 25 pulsators: ten fundamental mode, three overtone and two double-mode classical Cepheids, plus three Type II and seven anomal
Externí odkaz:
http://arxiv.org/abs/2012.09709
Properties of the Hyades, the eclipsing binary HD27130, and the oscillating red giant $\epsilon$ Tau
Autor:
Brogaard, K., Pakštienė, E., Grundahl, F., Mikolaitis, Š., Tautvaišienė, G., Slumstrup, D., Talens, G. J. J., VandenBerg, D. A., Miglio, A., Arentoft, T., Kjeldsen, H., Janulis, R., Drazdauskas, A., Marchini, A., Minkevičiūtė, R., Stonkutė, E., Bagdonas, V., Andersen, M. Fredslund, Jessen-Hansen, J., Pallé, P. L., Dorval, P., Snellen, I. A. G., Otten, G. P. P. L., White, T. R.
Publikováno v:
A&A 645, A25 (2021)
Eclipsing binary stars allow derivation of accurate and precise masses and radii. When they reside in star clusters, properties of even higher precision, along with additional information, can be extracted. Asteroseismology of solar-like oscillations
Externí odkaz:
http://arxiv.org/abs/2011.02274
Autor:
Tautvaišienė, G., Mikolaitis, Š., Drazdauskas, A., Stonkutė, E., Minkevičiūtė, R., Kjeldsen, H., Brogaard, K., von Essen, C., Grundahl, F., Pakštienė, E., Bagdonas, V., Vázquez, C. Viscasillas
Publikováno v:
The Astrophysical Journal Supplement Series, 248:19 (11pp), 2020 May
Accurate atmospheric parameters and chemical composition of stars play a vital role in characterizing physical parameters of exoplanetary systems and understanding of their formation. A full asteroseismic characterization of a star is also possible i
Externí odkaz:
http://arxiv.org/abs/2005.07526
Autor:
von Essen, C., Mallonn, M., Hermansen, S., Nixon, M. C., Madhusudhan, N., Kjeldsen, H., Tautvaišienė, G.
Publikováno v:
A&A 637, A76 (2020)
We present an atmospheric transmission spectrum of the ultra-hot Jupiter WASP-76 b by analyzing archival data obtained with the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). The dataset spans three transits, t
Externí odkaz:
http://arxiv.org/abs/2003.06424
Autor:
Charpinet, S., Brassard, P., Fontaine, G., Van Grootel, V., Zong, W., Giammichele, N., Heber, U., Bognár, Zs., Geier, S., Green, E. M., Hermes, J. J., Kilkenny, D., Østensen, R. H., Pelisoli, I., Silvotti, R., Telting, J. H., Vučković, M., Worters, H. L., Baran, A. S., Bell, K. J., Bradley, P. A., Debes, J. H., Kawaler, S. D., Kołaczek-Szymański, P., Murphy, S. J., Pigulski, A., Sódor, À., Uzundag, M., Handberg, R., Kjeldsen, H., Ricker, G. R., Vanderspek, R. K.
Publikováno v:
A&A 632, A90 (2019)
We present the discovery and asteroseismic analysis of a new g-mode hot B subdwarf (sdB) pulsator, EC 21494-7018 (TIC 278659026), monitored in TESS first sector using 120-second cadence. The light curve analysis reveals that EC 21494-7018 is a sdB pu
Externí odkaz:
http://arxiv.org/abs/1910.04234
Autor:
von Essen, C., Stefansson, G., Mallonn, M., Pursimo, T., Djupvik, A. A., Mahadevan, S., Kjeldsen, H., Freudenthal, J., Dreizler, S.
We present the characterization of two engineered diffusers mounted on the 2.5 meter Nordic Optical Telescope, located at Roque de Los Muchachos, Spain. To assess the reliability and the efficiency of the diffusers, we carried out several test observ
Externí odkaz:
http://arxiv.org/abs/1904.05362