Zobrazeno 1 - 10
of 173
pro vyhledávání: '"Pallé, P L"'
Autor:
Dencs, Z., Derekas, A., Mitnyan, T., Andersen, M. F., Cseh, B., Grundahl, F., Hegedűs, V., Kovács, J., Kriskovics, L., Palle, P. L., Pál, A., Szigeti, L., Mészáros, Sz.
Understanding the atmospheric parameters of stars on the top of the RGB is essential to reveal the chemical composition of the Milky Way, as they can be used to probe the farthest parts of our Galaxy. Our goal is to determine the chemical composition
Externí odkaz:
http://arxiv.org/abs/2404.13176
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 514, Issue 3, pp.4190-4204, August 2022
We present the study on continuous high-resolution spectroscopic observations of two long-period single-lined RS Canum Venaticorum (RS CVn) binary stars IM Pegasi (IM Peg) and $\sigma$ Geminorum ($\sigma$ Gem), obtained with the Hertzsprung SONG tele
Externí odkaz:
http://arxiv.org/abs/2401.02585
Autor:
Breton, Sylvain N., Dhouib, Hachem, García, Rafael A., Brun, Allan Sacha, Mathis, Stéphane, Hernández, Fernando Pérez, Mathur, Savita, Dyrek, Achrène, Santos, Angela R. G., Pallé, Pere L.
Gravity modes (g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes (gi modes) possess unmatched properties as probes for stars with radiative interiors. The structural and dynamical constraints that they are able to provi
Externí odkaz:
http://arxiv.org/abs/2309.15691
Autor:
Henriksen, Andreea I., Antoci, Victoria, Saio, Hideyuki, Grundahl, Frank, Kjeldsen, Hans, Van Reeth, Timothy, Bowman, Dominic M., Pápics, Péter I., De Cat, Peter, Krüger, Joachim, Andersen, M. Fredslund, Pallé, P. L.
Here we report an ensemble study of 214 A- and F-type stars observed by \textit{Kepler}, exhibiting the so-called \textit{hump and spike} periodic signal, explained by Rossby modes (r~modes) -- the \textit{hump} -- and magnetic stellar spots or overs
Externí odkaz:
http://arxiv.org/abs/2306.16766
Autor:
Heeren, Paul, Tronsgaard, René, Grundahl, Frank, Reffert, Sabine, Quirrenbach, Andreas, Pallé, Pere L.
Publikováno v:
A&A 674, A164 (2023)
For existing and future projects dedicated to measuring precise radial velocities (RVs), we have created an open-source, flexible data reduction software to extract RVs from \'echelle spectra via the iodine (I$_2$) absorption cell method. The softwar
Externí odkaz:
http://arxiv.org/abs/2306.13615
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
We present a detailed analysis of an eclipsing double-lined binary FX UMa based on TESS photometry and newly acquired spectroscopic observations. The radial velocities and atmospheric parameters for each component star are obtained from the SONG high
Externí odkaz:
http://arxiv.org/abs/2212.04639
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:
Heeren, Paul, Reffert, Sabine, Trifonov, Trifon, Wong, Ka Ho, Lee, Man Hoi, Lillo-Box, Jorge, Quirrenbach, Andreas, Arentoft, Torben, Albrecht, Simon, Grundahl, Frank, Andersen, Mads Fredslund, Antoci, Victoria, Pallé, Pere L.
Publikováno v:
A&A 647, A160 (2021)
Using the Hamilton Echelle Spectrograph at Lick Observatory, we have obtained precise radial velocities (RVs) of a sample of 373 G- and K-giant stars over more than 12 years, leading to the discovery of several single and multiple planetary systems.
Externí odkaz:
http://arxiv.org/abs/2102.01999
Autor:
Breton, Sylvain N., Santos, Angela R. G., Bugnet, Lisa, Mathur, Savita, García, Rafael A., Pallé, Pere L.
Publikováno v:
A&A 647, A125 (2021)
In order to understand stellar evolution, it is crucial to efficiently determine stellar surface rotation periods. An efficient tool to automatically determine reliable rotation periods is needed when dealing with large samples of stellar photometric
Externí odkaz:
http://arxiv.org/abs/2101.10152