Zobrazeno 1 - 10
of 274
pro vyhledávání: '"Hans Kjeldsen"'
Autor:
Mia S. Lundkvist, Hans Kjeldsen, Timothy R. Bedding, Mark J. McCaughrean, R. Paul Butler, Ditte Slumstrup, Tiago L. Campante, Conny Aerts, Torben Arentoft, Hans Bruntt, Cátia V. Cardoso, Fabien Carrier, Laird M. Close, João Gomes da Silva, Thomas Kallinger, Robert R. King, Yaguang Li, Simon J. Murphy, Jakob L. Rørsted, Dennis Stello
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 110 (2024)
We have detected solar-like oscillations in the mid-K-dwarf ϵ Indi A, making it the coolest dwarf to have measured oscillations. The star is noteworthy for harboring a pair of brown dwarf companions and a Jupiter-type planet. We observed ϵ Indi A d
Externí odkaz:
https://doaj.org/article/2b97a4f1ec664b74ae4619e116657184
Autor:
Timothy R. Bedding, Simon J. Murphy, Courtney Crawford, Daniel R. Hey, Daniel Huber, Hans Kjeldsen, Yaguang Li, Andrew W. Mann, Guillermo Torres, Timothy R. White, George Zhou
Publikováno v:
The Astrophysical Journal Letters, Vol 946, Iss 1, p L10 (2023)
We studied 89 A- and F-type members of the Pleiades open cluster, including five escaped members. We measured projected rotational velocities ( $v\sin i$ ) for 49 stars and confirmed that stellar rotation causes a broadening of the main sequence in t
Externí odkaz:
https://doaj.org/article/97fdaf01fb2641378068af1bb2522159
Autor:
Travis S. Metcalfe, Derek Buzasi, Daniel Huber, Marc H. Pinsonneault, Jennifer L. van Saders, Thomas R. Ayres, Sarbani Basu, Jeremy J. Drake, Ricky Egeland, Oleg Kochukhov, Pascal Petit, Steven H. Saar, Victor See, Keivan G. Stassun, Yaguang Li, Timothy R. Bedding, Sylvain N. Breton, Adam J. Finley, Rafael A. García, Hans Kjeldsen, Martin B. Nielsen, J. M. Joel Ong, Jakob L. Rørsted, Amalie Stokholm, Mark L. Winther, Catherine A. Clark, Diego Godoy-Rivera, Ilya V. Ilyin, Klaus G. Strassmeier, Sandra V. Jeffers, Stephen C. Marsden, Aline A. Vidotto, Sallie Baliunas, Willie Soon
Publikováno v:
The Astronomical Journal, Vol 166, Iss 4, p 167 (2023)
The bright star λ Ser hosts a hot Neptune with a minimum mass of 13.6 M _⊕ and a 15.5 day orbit. It also appears to be a solar analog, with a mean rotation period of 25.8 days and surface differential rotation very similar to the Sun. We aim to ch
Externí odkaz:
https://doaj.org/article/cb097db1977143629195bc3f6d94b093
Autor:
Chaplin, William J., Serenelli, Aldo M., Miglio, Andrea, Morel, Thierry, Mackereth, J. Ted, Vincenzo, Fiorenzo, Basu, Hans Kjeldsen Sarbani, Ball, Warrick H., Stokholm, Amalie, Verma, Kuldeep, Mosumgaard, Jakob Rørsted, Aguirre, Victor Silva, Mazumdar, Anwesh, Ranadive, Pritesh, Antia, H. M., Lebreton, Yveline, Ong, Joel, Appourchaux, Thierry, Bedding, Timothy R., Christensen-Dalsgaard, Jørgen, Creevey, Orlagh, García, Rafael A., Handberg, Rasmus, Huber, Daniel, Kawaler, Steven D., Lund, Mikkel N., Metcalfe, Travis S., Stassun, Keivan G., Bazot, Michäel, Beck, Paul, Bell, Keaton J., Bergemann, Maria, Buzasi, Derek L., Benomar, Othman, Bossini, Diego, Bugnet, Lisa, Campante, Tiago L., Orhan, Zeynep Çelik, Corsaro, Enrico, González-Cuesta, Lucía, Davies, Guy R., Di Mauro, Maria Pia, Egeland, Ricky, Elsworth, Yvonne P., Gaulme, Patrick, Ghasemi, Hamed, Guo, Zhao, Hall, Oliver J., Hasanzadeh, Amir, Hekker, Saskia, Howe, Rachel, Jenkins, Jon M., Jiménez, Antonio, Kiefer, René, Kuszlewicz, James S., Kallinger, Thomas, Latham, David W., Lundkvist, Mia S., Mathur, Savita, Montalbán, Josefina, Mosser, Benoit, Bedón, Andres Moya, Nielsen, Martin Bo, Örtel, Sibel, Rendle, Ben M., Ricker, George R., Rodrigues, Thaíse S., Roxburgh, Ian W., Safari, Hossein, Schofield, Mathew, Seager, Sara, Smalley, Barry, Stello, Dennis, Szabó, Róbert, Tayar, Jamie, Themeßl, Nathalie, Thomas, Alexandra E. L., Vanderspek, Roland K., van Rossem, Walter E., Vrard, Mathieu, Weiss, Achim, White, Timothy R., Winn, Joshua N., Yıldız, Mutlu
Over the course of its history, the Milky Way has ingested multiple smaller satellite galaxies. While these accreted stellar populations can be forensically identified as kinematically distinct structures within the Galaxy, it is difficult in general
Externí odkaz:
http://arxiv.org/abs/2001.04653
Autor:
Andreea I Henriksen, Victoria Antoci, Hideyuki Saio, Matteo Cantiello, Hans Kjeldsen, Donald W Kurtz, Simon J Murphy, Savita Mathur, Rafael A García, Ângela R G Santos
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:216-232
The Kepler mission revealed a plethora of stellar variability in the light curves of many stars, some associated with magnetic activity or stellar oscillations. In this work, we analyse the periodic signal in 162 intermediate-mass stars, interpreted
Autor:
Timothy R. Bedding, Simon J. Murphy, Courtney Crawford, Daniel R. Hey, Daniel Huber, Hans Kjeldsen, Yaguang Li, Andrew W. Mann, Guillermo Torres, Timothy R. White, George Zhou
Publikováno v:
Bedding, T R, Murphy, S J, Crawford, C, Hey, D R, Huber, D, Kjeldsen, H, Li, Y, Mann, A W, Torres, G, White, T R & Zhou, G 2023, ' TESS Observations of the Pleiades Cluster : A Nursery for δ Scuti Stars ', Astrophysical Journal Letters, vol. 946, no. 1, L10 . https://doi.org/10.3847/2041-8213/acc17a
We studied 89 A- and F-type members of the Pleiades open cluster, including five escaped members. We measured projected rotational velocities (v sin i) for 49 stars and confirmed that stellar rotation causes a broadening of the main sequence in the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce14f998765406e52889dd9243717017
https://pure.au.dk/portal/da/publications/tess-observations-of-the-pleiades-cluster(629fbe1c-9871-4b01-8802-d6b290e502f4).html
https://pure.au.dk/portal/da/publications/tess-observations-of-the-pleiades-cluster(629fbe1c-9871-4b01-8802-d6b290e502f4).html
Autor:
Timothy R. Bedding, Hans Kjeldsen
With long data sets available for asteroseismology from space missions, it is sometimes necessary to deal with time series that have large gaps. This is becoming particularly relevant for TESS, which is revisiting many fields on the sky every two yea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ddd99faee2e946012eb1534fa21e0d4
Autor:
Yaguang Li, Timothy R Bedding, Dennis Stello, Daniel Huber, Marc Hon, Meridith Joyce, Tanda Li, Jean Perkins, Timothy R White, Joel C Zinn, Andrew W Howard, Howard Isaacson, Daniel R Hey, Hans Kjeldsen
Publikováno v:
Li, Y, Bedding, T R, Stello, D, Huber, D, Hon, M, Joyce, M, Li, T, Perkins, J, White, T R, Zinn, J C, Howard, A W, Isaacson, H, Hey, D R & Kjeldsen, H 2023, ' A prescription for the asteroseismic surface correction ', Monthly Notices of the Royal Astronomical Society, vol. 523, no. 1, pp. 916-927 . https://doi.org/10.1093/mnras/stad1445
In asteroseismology, the surface effect refers to a disparity between the observed and the modelled frequencies in stars with solar-like oscillations. It originates from improper modelling of the surface layers. Correcting the surface effect usually
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc3c235f856de8bd19b36f4c3c377490
http://arxiv.org/abs/2208.01176
http://arxiv.org/abs/2208.01176
Autor:
Daniel Huber, Timothy R. White, Travis S. Metcalfe, Ashley Chontos, Michael M. Fausnaugh, Cynthia S. K. Ho, Vincent Van Eylen, Warrick H. Ball, Sarbani Basu, Timothy R. Bedding, Othman Benomar, Diego Bossini, Sylvain Breton, Derek L. Buzasi, Tiago L. Campante, William J. Chaplin, Jørgen Christensen-Dalsgaard, Margarida S. Cunha, Morgan Deal, Rafael A. García, Antonio García Muñoz, Charlotte Gehan, Lucía González-Cuesta, Chen Jiang, Cenk Kayhan, Hans Kjeldsen, Mia S. Lundkvist, Stéphane Mathis, Savita Mathur, Mário J. P. F. G. Monteiro, Benard Nsamba, Jia Mian Joel Ong, Erika Pakštienė, Aldo M. Serenelli, Victor Silva Aguirre, Keivan G. Stassun, Dennis Stello, Sissel Norgaard Stilling, Mark Lykke Winther, Tao Wu, Thomas Barclay, Tansu Daylan, Maximilian N. Günther, J. J. Hermes, Jon M. Jenkins, David W. Latham, Alan M. Levine, George R. Ricker, Sara Seager, Avi Shporer, Joseph D. Twicken, Roland K. Vanderspek, Joshua N. Winn
Publikováno v:
Huber, D, White, T R, Metcalfe, T S, Chontos, A, Fausnaugh, M M, Ho, C S K, Van Eylen, V, Ball, W H, Basu, S, Bedding, T R, Benomar, O, Bossini, D, Breton, S, Buzasi, D L, Campante, T L, Chaplin, W J, Christensen-Dalsgaard, J, Cunha, M S, Deal, M, Garciá, R A, Garciá Munoz, A, Gehan, C, González-Cuesta, L, Jiang, C, Kayhan, C, Kjeldsen, H, Lundkvist, M S, Mathis, S, Mathur, S, Monteiro, M J P F G, Nsamba, B, Ong, J M J, Pakštiene, E, Serenelli, A M, Silva Aguirre, V, Stassun, K G, Stello, D, Norgaard Stilling, S, Lykke Winther, M, Wu, T, Barclay, T, Daylan, T, Günther, M N, Hermes, J J, Jenkins, J M, Latham, D W, Levine, A M, Ricker, G R, Seager, S, Shporer, A, Twicken, J D, Vanderspek, R K & Winn, J N 2022, ' A 20 Second Cadence View of Solar-type Stars and Their Planets with TESS : Asteroseismology of Solar Analogs and a Recharacterization of p Men c ', Astronomical Journal, vol. 163, no. 2, 79 . https://doi.org/10.3847/1538-3881/ac3000
Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomical journal, Bristol : IOP publishing Ltd, 2022, vol. 163, iss. 2, art. no. 79, p. [1-17]
The Astronomical Journal
Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomical journal, Bristol : IOP publishing Ltd, 2022, vol. 163, iss. 2, art. no. 79, p. [1-17]
The Astronomical Journal
We present an analysis of the first 20 second cadence light curves obtained by the TESS space telescope during its extended mission. We find improved precision of 20 second data compared to 2 minute data for bright stars when binned to the same caden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6529dbc7a86d6cf4620e431b2c68fd0c
http://hdl.handle.net/10261/279517
http://hdl.handle.net/10261/279517
Autor:
M. L. Winther, Zeynep Çelik Orhan, Jennifer L. van Saders, Richard H. D. Townsend, Daniel Huber, Maïssa Salama, Sibel Örtel, Victor Silva Aguirre, R. Paul Butler, Savita Mathur, Travis A. Berger, Keivan G. Stassun, Aldo Serenelli, Hans Kjeldsen, Ashley Chontos, Timothy R. Bedding, Jia Mian Joel Ong, Mia S. Lundkvist, Zachary R. Claytor, Steve B. Howell, Robert A. Wittenmyer, Warrick H. Ball, Martin Bo Nielsen, C. G. Tinney, Sarbani Basu, Travis S. Metcalfe, Mutlu Yildiz, Rafael A. García, Enrico Corsaro, William J. Chaplin
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Chontos, A, Huber, D, Berger, T A, Kjeldsen, H, Serenelli, A M, Silva Aguirre, V, Ball, W H, Basu, S, Bedding, T R, Chaplin, W J, Claytor, Z R, Corsaro, E, Garcia, R A, Howell, S B, Lundkvist, M S, Mathur, S, Metcalfe, T S, Nielsen, M B, Mian Joel Ong, J, Celik Orhan, Z, Ortel, S, Salama, M, Stassun, K G, Townsend, R H D, Van Saders, J L, Winther, M, Yildiz, M, Butler, R P, Tinney, C G & Wittenmyer, R A 2021, ' TESS Asteroseismology of α Mensae : Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion ', Astrophysical Journal, vol. 922, no. 2, 229 . https://doi.org/10.3847/1538-4357/ac1269
instname
Chontos, A, Huber, D, Berger, T A, Kjeldsen, H, Serenelli, A M, Silva Aguirre, V, Ball, W H, Basu, S, Bedding, T R, Chaplin, W J, Claytor, Z R, Corsaro, E, Garcia, R A, Howell, S B, Lundkvist, M S, Mathur, S, Metcalfe, T S, Nielsen, M B, Mian Joel Ong, J, Celik Orhan, Z, Ortel, S, Salama, M, Stassun, K G, Townsend, R H D, Van Saders, J L, Winther, M, Yildiz, M, Butler, R P, Tinney, C G & Wittenmyer, R A 2021, ' TESS Asteroseismology of α Mensae : Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion ', Astrophysical Journal, vol. 922, no. 2, 229 . https://doi.org/10.3847/1538-4357/ac1269
Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars. The Kepler Space Telescope initiated a revolution by detecting oscillations in more than 500 main-se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abcd89a11dcf25bc55af6ddc2c47c1b9
http://hdl.handle.net/10261/261934
http://hdl.handle.net/10261/261934