Results 11 to 20 of about 6,468 (258)

Asteroseismology of Compact Stars

Universe
Compact stars have been perceived as natural laboratories of matter at an extremely high density. The uncertainties of the equation of state (EOS) of matter can be constrained by observing compact stars.
Hong-Bo Li, Yong Gao, Lijing Shao, Ren-Xin Xu   +3 more
doaj   +4 more sources

Asteroseismology Across the Hertzsprung–Russell Diagram [PDF]

Annual Review of Astronomy and Astrophysics, 2022
Asteroseismology has grown from its beginnings three decades ago to a mature field teeming with discoveries and applications. This phenomenal growth has been enabled by space photometry with precision 10–100 times better than ground-based observations ...
Kurtz, Donald Wayne
core   +2 more sources

Discovery of post-mass-transfer helium-burning red giants using asteroseismology [PDF]

Nature Astronomy, 2022
International audienceA star expands to become a red giant when it has fused all the hydrogen in its core into helium. If the star is in a binary system, its envelope can overflow onto its companion or be ejected into space, leaving a hot core and ...
Stello, Dennis, Marks, Dion, Li, Gang, Li, Yaguang, Huber, Daniel, Colman, Isabel L., Hey, Daniel R., Hayden, Michael R., Murphy, Simon J., Zhang, Xianfei, Montet, Benjamin T., Sharma, Sanjib, Bedding, Timothy R., Chen, Yifan, Joyce, Meridith, Bi, Shaolan, Wu, Yaqian   +16 more
core   +2 more sources

Expanding the frontiers of cool-dwarf asteroseismology with ESPRESSO [PDF]

Astronomy & Astrophysics
Fuelled by space photometry, asteroseismology is vastly benefitting the study of cool main-sequence stars, which exhibit convection-driven solar-like oscillations. Even so, the tiny oscillation amplitudes in K dwarfs continue to pose a challenge to space-
H. Kjeldsen, A. W. Neitzel, Chaplin, W. J., M. B. Nielsen, Monteiro, M. J. P. F. G., Santos, N. C., Li, Y., T. Azevedo Silva, E. Poretti, R. A. García, M. N. Lund, T. L. Campante, M. S. Lundkvist, Faria, J. P., Cunha, M. S., Corsaro, E., Bossini, D., S. G. Sousa, Cristo, E., J. Gomes da Silva, Neitzel, A. W., J. P. Faria, D. L. Buzasi, N. C. Santos, Gomes da Silva, J., M. J. P. F. G. Monteiro, Nielsen, M. B., T. R. Bedding, E. Corsaro, D. Bossini, M. S. Cunha, Sousa, S. G., Kjeldsen, H., W. J. Chaplin, Y. Li, Poretti, E., E. Cristo, Buzasi, D. L., Costa, R. R., Adibekyan, V., T. S. Metcalfe, Martins, J. H. C., Huber, D., Lundkvist, M. S., Azevedo Silva, T., V. Adibekyan, García, R. A., Silva, A. M., R. R. Costa, Metcalfe, T. S., Bedding, T. R., J. H. C. Martins, D. Huber, A. M. Silva, Lund, M. N., Campante, T. L.   +55 more
core   +3 more sources

A calibration point for stellar evolution from massive star asteroseismology [PDF]

Nature Astronomy, 2023
Transiting Exoplanet Survey Satellite data of the massive star HD 192575 reveal pulsation frequencies that allow the inference of its convective core mass and interior rotation profile, thus providing a calibration point for interior chemical and angular
S. Burssens, D. Bowman, M. Michielsen, S. Simón-Díaz, C. Aerts, Vincent Vanlaer, G. Banyard, N. Nardetto, R. Townsend, G. Handler, J. Mombarg, R. Vanderspek, G. Ricker   +12 more
semanticscholar   +1 more source

Internal magnetic fields in 13 red giants detected by asteroseismology [PDF]

Astronomy & Astrophysics, 2023
While surface fields have been measured for stars across the HR diagram, internal magnetic fields remain largely unknown. The recent seismic detection of magnetic fields in the cores of several Kepler red giants has opened a new avenue to understand ...
Gang Li, S. Deheuvels, Tanda Li, J. Ballot, F. Lignieres   +4 more
semanticscholar   +1 more source

The Potential of Asteroseismology to Resolve the Blue Supergiant Problem [PDF]

Astrophysical Journal Letters, 2023
Despite major progress in our understanding of massive stars, concerning discrepancies still remain between observations and theory. Most notable are the numerous stars observed beyond the theoretical main sequence, an evolutionary phase expected to be ...
E. Bellinger, S. D. de Mink, W. E. van Rossem, S. Justham   +3 more
semanticscholar   +1 more source

Giant Planet Engulfment by Evolved Giant Stars: Light Curves, Asteroseismology, and Survivability [PDF]

Astrophysical Journal, 2023
About ten percent of Sun-like (1–2 M ⊙) stars will engulf a 1–10 M J planet as they expand during the red giant branch (RGB) or asymptotic giant branch (AGB) phase of their evolution.
C. O’Connor, L. Bildsten, M. Cantiello, D. Lai   +3 more
semanticscholar   +1 more source

Asteroseismology and Spectropolarimetry of the Exoplanet Host Star λ Serpentis [PDF]

Astronomical Journal, 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.
T. Metcalfe, D. Buzasi, D. Huber, M. Pinsonneault, J. Saders, T. Ayres, S. Basu, J. Drake, R. Egeland, O. Kochukhov, P. Petit, S. Saar, V. See, K. Stassun, Yaguang Li, T. Bedding, S. Breton, A. Finley, R. García, H. Kjeldsen, M. Nielsen, J. Ong, J. L. Rørsted, A. Stokholm, M. Winther, C. Clark, D. Godoy-Rivera, I. Ilyin, K. Strassmeier, S. Jeffers, S. Marsden, A. Vidotto, S. Baliunas, W. Soon   +33 more
semanticscholar   +1 more source

Making waves in massive star asteroseismology [PDF]

Astrophysics and Space Science, 2023
Massive stars play a major role not only in stellar evolution but also galactic evolution theory. This is because of their dynamical interaction with binary companions, but also because their strong winds and explosive deaths as supernovae provide ...
D. Bowman
semanticscholar   +1 more source