Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Sylvain N"'
Autor:
Ângela R. G. Santos, Diego Godoy-Rivera, Adam J. Finley, Savita Mathur, Rafael A. García, Sylvain N. Breton, Anne-Marie Broomhall
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
While the mission’s primary goal was focused on exoplanet detection and characterization, Kepler made and continues to make extraordinary advances in stellar physics. Stellar rotation and magnetic activity are no exceptions. Kepler allowed for thes
Externí odkaz:
https://doaj.org/article/9aed012888c14f8988604c22a71246f7
Autor:
Travis S. Metcalfe, Jennifer L. van Saders, Daniel Huber, Derek Buzasi, Rafael A. García, Keivan G. Stassun, Sarbani Basu, Sylvain N. Breton, Zachary R. Claytor, Enrico Corsaro, Martin B. Nielsen, J. M. Joel Ong, Nicholas Saunders, Amalie Stokholm, Timothy R. Bedding
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 31 (2024)
The solar-type subgiant β Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was estimated to be near 27 days. As a Southern Hemisphere target, it was not monitored by long-term s
Externí odkaz:
https://doaj.org/article/14e6e8c7daee46e38e44e35482b4bc18
Autor:
Garcia, Rafael A., Breton, Sylvain N., Salabert, David, Tripathy, Sushant C., Jain, Kiran, Mathur, Savita, Panetier, Eva
Publikováno v:
A&A 691, L20 (2024)
Solar magnetic activity follows regular cycles of about 11 years with an inversion of polarity in the poles every 22 years. This changing surface magnetism impacts the properties of the acoustic modes. The acoustic mode frequency shifts are a good pr
Externí odkaz:
http://arxiv.org/abs/2410.23928
Autor:
Metcalfe, Travis S., van Saders, Jennifer L., Huber, Daniel, Buzasi, Derek, Garcia, Rafael A., Stassun, Keivan G., Basu, Sarbani, Breton, Sylvain N., Claytor, Zachary R., Corsaro, Enrico, Nielsen, Martin B., Ong, J. M. Joel, Saunders, Nicholas, Stokholm, Amalie, Bedding, Timothy R.
Publikováno v:
Astrophys. J. 974, 31 (2024)
The solar-type subgiant $\beta$ Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was estimated to be near 27 days. As a southern hemisphere target it was not monitored by long-te
Externí odkaz:
http://arxiv.org/abs/2408.05482
Autor:
Bétrisey, Jérôme, Farnir, Martin, Breton, Sylvain N., García, Rafael A., Broomhall, Anne-Marie, Amarsi, Anish M., Kochukhov, Oleg
Publikováno v:
A&A 688, L17 (2024)
Building on the success of previous missions, asteroseismic modelling will play a key role in future space-based missions, such as PLATO, CubeSpec, and Roman. Despite remarkable achievements, asteroseismology has revealed significant discrepancies in
Externí odkaz:
http://arxiv.org/abs/2407.15655
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:
Savita Mathur, Zachary R. Claytor, Ângela R. G. Santos, Rafael A. García, Louis Amard, Lisa Bugnet, Enrico Corsaro, Alfio Bonanno, Sylvain N. Breton, Diego Godoy-Rivera, Marc H. Pinsonneault, Jennifer van Saders
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 2, p 131 (2023)
The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually computed from stellar evolution models, relations linking ages to other stellar properties, such as
Externí odkaz:
https://doaj.org/article/cc945e9ad1d74f3593abd5ee4ce2d86a
Autor:
Tiago L. Campante, Tanda Li, J. M. Joel Ong, Enrico Corsaro, Margarida S. Cunha, Timothy R. Bedding, Diego Bossini, Sylvain N. Breton, Derek L. Buzasi, William J. Chaplin, Morgan Deal, Rafael A. García, Michelle L. Hill, Marc Hon, Daniel Huber, Chen Jiang, Stephen R. Kane, Cenk Kayhan, James S. Kuszlewicz, Jorge Lillo-Box, Savita Mathur, Mário J. P. F. G. Monteiro, Filipe Pereira, Nuno C. Santos, Aldo Serenelli, Dennis Stello
Publikováno v:
The Astronomical Journal, Vol 165, Iss 5, p 214 (2023)
Asteroseismology is playing an increasingly important role in the characterization of red giant host stars and their planetary systems. Here, we conduct detailed asteroseismic modeling of the evolved red giant branch (RGB) hosts KOI-3886 and ι Draco
Externí odkaz:
https://doaj.org/article/933892b91fcd4fa298bf766335340f8f
Autor:
Chen Jiang, Tao Wu, Adina D. Feinstein, Keivan G. Stassun, Timothy R. Bedding, Dimitri Veras, Enrico Corsaro, Derek L. Buzasi, Dennis Stello, Yaguang Li, Savita Mathur, Rafael A. García, Sylvain N. Breton, Mia S. Lundkvist, Przemysław J. Mikołajczyk, Charlotte Gehan, Tiago L. Campante, Diego Bossini, Stephen R. Kane, Jia Mian Joel Ong, Mutlu Yıldız, Cenk Kayhan, Zeynep Çelik Orhan, Sibel Örtel, Xinyi Zhang, Margarida S. Cunha, Bruno Lustosa de Moura, Jie Yu, Daniel Huber, Jian-wen Ou, Robert A. Wittenmyer, Laurent Gizon, William J. Chaplin
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 1, p 20 (2023)
The Transiting Exoplanet Survey Satellite (TESS) mission searches for new exoplanets. The observing strategy of TESS results in high-precision photometry of millions of stars across the sky, allowing for detailed asteroseismic studies of individual s
Externí odkaz:
https://doaj.org/article/44154bef65484b1d85f9d7ebc378acc0
Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
Autor:
Jamie Tayar, Facundo D. Moyano, Melinda Soares-Furtado, Ana Escorza, Meridith Joyce, Sarah L. Martell, Rafael A. García, Sylvain N. Breton, Stéphane Mathis, Savita Mathur, Vincent Delsanti, Sven Kiefer, Sabine Reffert, Dominic M. Bowman, Timothy Van Reeth, Shreeya Shetye, Charlotte Gehan, Samuel K. Grunblatt
Publikováno v:
The Astrophysical Journal, Vol 940, Iss 1, p 23 (2022)
In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low- and intermediate-mass stars, the rotation on the main sequence seems to be close to rigid. As these st
Externí odkaz:
https://doaj.org/article/6001f52a1aa9479f86e2d63223f3da31