Results 81 to 90 of about 6,468 (258)

The revolutionary breakthroughs and remaining bottlenecks of accurate astrometric asteroseismology

, 2022
<p>Asteroseismology and Gaia astrometry have both revolutionized astronomy thanks to the precise stellar radii and masses that they provide, which benefit studies of exoplanets, Galactic archaeology, and stellar physics.
Zinn, Joel
core   +1 more source

Asteroseismology of RR Lyrae stars with non-radial modes [PDF]

, 2022
The additional signals observed in the frequency spectra of the first-overtone RR Lyrae stars, that form a period ratio around 0.61 with the period of the first overtone, are a common phenomenon for RRc and RRd stars, as well as for first-overtone classical
H. Netzel, R. Smolec
semanticscholar   +1 more source

Age dating of an early Milky Way merger via asteroseismology of the naked-eye star ν Indi [PDF]

Nature Astronomy, 2020
Over the course of its history, the Milky Way has ingested multiple smaller satellite galaxies1. Although these accreted stellar populations can be forensically identified as kinematically distinct structures within the Galaxy, it is difficult in general
W. Chaplin, A. Serenelli, A. Miglio, T. Morel, J. Mackereth, F. Vincenzo, H. Kjeldsen, S. Basu, W. Ball, A. Stokholm, K. Verma, J. Mosumgaard, V. Silva Aguirre, A. Mazumdar, P. Ranadive, H. M. Antia, Y. Lebreton, J. Ong, T. Appourchaux, T. Bedding, J. Christensen-Dalsgaard, O. Creevey, R. García, R. Handberg, D. Huber, S. Kawaler, M. Lund, T. Metcalfe, K. Stassun, M. Bazot, P. Beck, K. Bell, M. Bergemann, D. Buzasi, O. Benomar, D. Bossini, L. Bugnet, T. Campante, Z. Ç. Orhan, E. Corsaro, L. González-Cuesta, G. Davies, M. D. Di Mauro, R. Egeland, Y. Elsworth, P. Gaulme, H. Ghasemi, Zhao Guo, O. Hall, A. Hasanzadeh, S. Hekker, R. Howe, J. Jenkins, A. Jiménez, R. Kiefer, J. Kuszlewicz, T. Kallinger, D. Latham, M. Lundkvist, S. Mathur, J. Montalbán, B. Mosser, Andres Moya Bedón, M. Nielsen, S. Örtel, B. Rendle, G. Ricker, T. Rodrigues, I. Roxburgh, H. Safari, Mathew Schofield, S. Seager, B. Smalley, D. Stello, R. Szabó, J. Tayar, N. Themessl, A. Thomas, R. Vanderspek, W. E. van Rossem, M. Vrard, A. Weiss, T. White, J. Winn, M. Yıldız   +84 more
semanticscholar   +1 more source

Asteroseismology Applied to Constrain Structure Parameters of δ Scuti Stars [PDF]

Asteroseismology is a powerful tool to probe stellar structure. Spaceborne instruments like CoRoT, Kepler, and TESS have observed the oscillations of numerous stars, among which δ Scutis are particularly interesting, owing to their fast rotation and ...
Panda, Subrata Kumar, Hanasoge, Shravan, Murphy, Simon J., Bedding, Timothy R., Dhanpal, Siddharth   +4 more
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White Dwarfs as Physics Laboratories: Lights and Shadows

Frontiers in Astronomy and Space Sciences, 2022
The evolution of white dwarfs is essentially a gravothermal process of cooling in which the basic ingredients for predicting their evolution are well identified, although not always well understood. There are two independent ways to test the cooling rate.
J. Isern, J. Isern, J. Isern, S. Torres, S. Torres, A. Rebassa-Mansergas, A. Rebassa-Mansergas   +6 more
doaj   +1 more source

PBjam: A Python Package for Automating Asteroseismology of Solar-like Oscillators [PDF]

Astronomical Journal, 2020
Asteroseismology is an exceptional tool for studying stars using the properties of observed modes of oscillation. So far the process of performing an asteroseismic analysis of a star has remained somewhat esoteric and inaccessible to nonexperts.
M. Nielsen, G. Davies, W. Ball, A. Lyttle, T. Li, O. Hall, W. Chaplin, P. Gaulme, L. Carboneau, J. Ong, R. Garc'ia, B. Mosser, I. Roxburgh, E. Corsaro, O. Benomar, A. Moya, M. J. D. O. Physics, Astronomy, U. Birmingham, Stellar Astrophysics Centre, D. Physics, A. University, Center for Space Science, N. Institute, New York University Abu Dhabi, M. F. Sonnensystemforschung, D. O. Astronomy, Yale University, Irfu, Cea, Universit'e Paris-Saclay, Aim, Cnrs, U. Diderot, Sorbonne Paris Cit'e, Lesia, Observatoire de Paris, Universit'e Psl, Sorbonne Universit'e, U. Paris, A. Unit, S. O. Physics, Queen Mary University London, Inaf - Catania, Solar Science Observatory, Naoj, Department of Materials Science, Sokendai, Electrical Engineering, Electronics, Automation, A. P. Department, E.T.S.I.D.I, Polytechnic University of Madrid   +53 more
semanticscholar   +1 more source

Studying the surface effect in Procyon A as an F-type star

Astronomy & Astrophysics
Context. Procyon A is an F-type main-sequence star in a binary system. It has been the subject of numerous ground-based and space-based observing campaigns, providing precise classical constraints, including a well-determined mass.
Moedas Nuno, Di Mauro Maria Pia
doaj   +1 more source

Asteroseismic inferences from the study of non-linearities in δ Sct stars

Frontiers in Astronomy and Space Sciences, 2022
Many pulsating star light curves must be interpreted strictly within the framework of a non-linear theory. The detection of non-linear interactions between pulsation modes has increased due to the ultra-precise photometric data provided by space missions.
Mariel Lares-Martiz
doaj   +1 more source

Super-Nyquist asteroseismology with the Kepler Space Telescope

, 2013
Barycentric corrections made to the timing of Kepler observations, necessitated by variations in light arrival time at the satellite, break the regular time-sampling of the data -- the time stamps are periodically modulated. A consequence is that Nyquist
Kurtz, Donald W., Murphy, Simon J., Kurtz, Donald Wayne, Simon J. Murphy, Shibahashi, Hiromoto, Hiromoto Shibahashi, Donald W. Kurtz   +6 more
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Asteroseismology of 36 Kepler subgiants – I. Oscillation frequencies, linewidths, and amplitudes [PDF]

Monthly notices of the Royal Astronomical Society, 2020
The presence of mixed modes makes subgiants excellent targets for asteroseismology, providing a probe for the internal structure of stars. Here we study 36 Kepler subgiants with solar-like oscillations and report their oscillation mode parameters.
Yaguang Li, T. Bedding, Tanda Li, S. Bi, D. Stello, Yixiao Zhou, T. White   +6 more
semanticscholar   +1 more source