Zobrazeno 1 - 10
of 443
pro vyhledávání: '"KAROFF, C."'
Autor:
Santos, A. R. G., Campante, T. L., Chaplin, W. J., Cunha, M. S., van Saders, J. L., Karoff, C., Metcalfe, T. S., Mathur, S., Garcia, R. A., Lund, M. N., Kiefer, R., Aguirre, V. Silva, Davies, G. R., Howe, R., Elsworth, Y.
In the Sun, the properties of acoustic modes are sensitive to changes in the magnetic activity. In particular, mode frequencies are observed to increase with increasing activity level. Thanks to CoRoT and Kepler, such variations have been found in ot
Externí odkaz:
http://arxiv.org/abs/1908.02897
Autor:
Karoff, C., Metcalfe, T. S., Montet, B. T., Jannsen, N. E., Santos, A. R. G., Nielsen, M. B., Chaplin, W. J.
By combining ground-based spectrographic observations of variability in the chromospheric emission from Sun-like stars with the variability seen in their eigenmode frequencies, it is possible to relate the changes observed at the surfaces of these st
Externí odkaz:
http://arxiv.org/abs/1902.02172
First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her
Autor:
Grundahl, F., Andersen, M. Fredslund, Christensen-Dalsgaard, J., Antoci, V., Kjeldsen, H., Handberg, R., Houdek, G., Bedding, T. R., Pallé, P. L., Jessen-Hansen, J., Aguirre, V. Silva, White, T. R., Frandsen, S., Albrecht, S., Andersen, M. I., Arentoft, T., Brogaard, K., Chaplin, W. J., Harpsøe, K., Jørgensen, U. G., Karovicova, I., Karoff, C., Rasmussen, P. Kjærgaard, Lund, M. N., Lundkvist, M. Sloth, Skottfelt, J., Sørensen, A. Norup, Tronsgaard, R., Weiss, E.
We report the first asteroseismic results obtained with the Hertzsprung SONG Telescope from an extensive high-precision radial-velocity observing campaign of the subgiant muHerculis. The data set was collected during 215 nights in 2014 and 2015. We d
Externí odkaz:
http://arxiv.org/abs/1701.03365
Autor:
White, T. R., Benomar, O., Aguirre, V. Silva, Ball, W. H., Bedding, T. R., Chaplin, W. J., Christensen-Dalsgaard, J., Garcia, R. A., Gizon, L., Stello, D., Aigrain, S., Antia, H. M., Appourchaux, T., Bazot, M., Campante, T. L., Creevey, O. L., Davies, G. R., Elsworth, Y. P., Gaulme, P., Handberg, R., Hekker, S., Houdek, G., Howe, R., Huber, D., Karoff, C., Marques, J. P., Mathur, S., McQuillan, A., Metcalfe, T. S., Mosser, B., Nielsen, M. B., Régulo, C., Salabert, D., Stahn, T.
Publikováno v:
A&A 601, A82 (2017)
Binary star systems are important for understanding stellar structure and evolution, and are especially useful when oscillations can be detected and analysed with asteroseismology. However, only four systems are known in which solar-like oscillations
Externí odkaz:
http://arxiv.org/abs/1609.09581
Autor:
Guzik, J. A., Houdek, G., Chaplin, W. J., Smalley, B., Kurtz, D. W., Gilliland, R. L., Mullally, F., Rowe, J. F., Bryson, S. T., Still, M. D., Antoci, V., Appourchaux, T., Basu, S., Bedding, T. R., Benomar, O., Garcia, R. A., Huber, D., Kjeldsen, H., Latham, D. W., Metcalfe, T. S., Pápics, P. I., White, T. R., Aerts, C., Ballot, J., Boyajian, T. S., Briquet, M., Bruntt, H., Buchhave, L. A., Campante, T. L., Catanzaro, G., Christensen-Dalsgaard, J., Davies, G. R., Doğan, G., Dragomir, D., Doyle, A. P., Elsworth, Y., Frasca, A., Gaulme, P., Gruberbauer, M., Handberg, R., Hekker, S., Karoff, C., Lehmann, H., Mathias, P., Mathur, S., Miglio, A., Molenda-Żakowicz, J., Mosser, B., Murphy, S. J., Régulo, C., Ripepi, V., Salabert, D., Sousa, S. G., Stello, D., Uytterhoeven, K.
$\theta$ Cygni is an F3 spectral-type main-sequence star with visual magnitude V=4.48. This star was the brightest star observed by the original Kepler spacecraft mission. Short-cadence (58.8 s) photometric data using a custom aperture were obtained
Externí odkaz:
http://arxiv.org/abs/1607.01035
Autor:
Lundkvist, M. S., Kjeldsen, H., Albrecht, S., Davies, G. R., Basu, S., Huber, D., Justesen, A. B., Karoff, C., Aguirre, V. Silva, Van Eylen, V., Vang, C., Arentoft, T., Barclay, T., Bedding, T. R., Campante, T. L., Chaplin, W. J., Christensen-Dalsgaard, J., Elsworth, Y. P., Gilliland, R. L., Handberg, R., Hekker, S., Kawaler, S. D., Lund, M. N., Metcalfe, T. S., Miglio, A., Rowe, J. F., Stello, D., Tingley, B., White, T. R.
Publikováno v:
Nature Communications, Volume 7, id. 11201 (2016)
Simulations predict that hot super-Earth sized exoplanets can have their envelopes stripped by photo-evaporation, which would present itself as a lack of these exoplanets. However, this absence in the exoplanet population has escaped a firm detection
Externí odkaz:
http://arxiv.org/abs/1604.05220
Autor:
Campante, T. L., Lund, M. N., Kuszlewicz, J. S., Davies, G. R., Chaplin, W. J., Albrecht, S., Winn, J. N., Bedding, T. R., Benomar, O., Bossini, D., Handberg, R., Santos, A. R. G., Van Eylen, V., Basu, S., Christensen-Dalsgaard, J., Elsworth, Y. P., Hekker, S., Hirano, T., Huber, D., Karoff, C., Kjeldsen, H., Lundkvist, M. S., North, T. S. H., Aguirre, V. Silva, Stello, D., White, T. R.
The angle $\psi$ between a planet's orbital axis and the spin axis of its parent star is an important diagnostic of planet formation, migration, and tidal evolution. We seek empirical constraints on $\psi$ by measuring the stellar inclination $i_{\rm
Externí odkaz:
http://arxiv.org/abs/1601.06052
Autor:
Davies, G. R., Aguirre, V. Silva, Bedding, T. R., Handberg, R., Lund, M. N., Chaplin, W. J., Huber, D., White, T. R., Benomar, O., Hekker, S., Basu, S., Campante, T. L., Christensen-Dalsgaard, J., Elsworth, Y., Karoff, C., Kjeldsen, H., Lundkvist, M. S., Metcalfe, T. S., Stello, D.
\Kepler has revolutionised our understanding of both exoplanets and their host stars. Asteroseismology is a valuable tool in the characterisation of stars and \Kepler is an excellent observing facility to perform asteroseismology. Here we select a sa
Externí odkaz:
http://arxiv.org/abs/1511.02105
Solar modulation potential (SMP) reconstructions based on cosmogenic nuclide records reflect changes in the open solar magnetic field and can therefore help us obtain information on the behaviour of the open solar magnetic field over the Holocene per
Externí odkaz:
http://arxiv.org/abs/1509.06182
Autor:
De Cat, P., Fu, J. N., Ren, A. B., Yang, X. H., Shi, J. R., Luo, A. L., Yang, M., Wang, J. L., Zhang, H. T., Shi, H. M., Zhang, W., Dong, Subo, Catanzaro, G., Corbally, C. J., Frasca, A., Gray, R. O., Molenda-Zakowicz, J., Uytterhoeven, K., Briquet, M., Bruntt, H., Frandsen, S., Kiss, L., Kurtz, D. W., Marconi, M., Niemczura, E., Oestensen, R. H., Ripepi, V., Smalley, B., Southworth, J., Szabo, R., Telting, J. H., Karoff, C., Aguirre, V. Silva, Wu, Y., Hou, Y. H., Jin, G., Zhou, X. L.
The nearly continuous light curves with micromagnitude precision provided by the space mission Kepler are revolutionising our view of pulsating stars. They have revealed a vast sea of low-amplitude pulsation modes that were undetectable from Earth. T
Externí odkaz:
http://arxiv.org/abs/1508.06391