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pro vyhledávání: '"J. M. Joel Ong"'
Autor:
J. M. Joel Ong, Marc Teng Yen Hon, Melinda Soares-Furtado, Alexander P. Stephan, Jennifer van Saders, Jamie Tayar, Benjamin Shappee, Daniel R. Hey, Lyra Cao, Mutlu Yıldız, Zeynep Çelik Orhan, Sibel Örtel, Benjamin Montet, Thomas W.-S. Holoien, Joss Bland-Hawthorn, Sven Buder, Gayandhi M. De Silva, Ken C. Freeman, Sarah L. Martell, Geraint F. Lewis, Sanjib Sharma, Dennis Stello
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 42 (2024)
We report the discovery and characterization of TIC 350842552 (“Zvrk”), an apparently isolated, rapidly rotating ( P _rot ∼ 99 days) red giant observed by TESS in its southern Continuous Viewing Zone. The star’s fast surface rotation is indep
Externí odkaz:
https://doaj.org/article/bb5b471dee324e7eada5b0ab43f2da63
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 171 (2024)
Some physical processes that occur during a star's main-sequence evolution also affect its post-main-sequence evolution. It is well known that stars with masses above approximately 1.1 M _⊙ have well-mixed convective cores on the main sequence; how
Externí odkaz:
https://doaj.org/article/85f54c782d44407d9be7679b7da72424
Autor:
J. M. Joel Ong
Publikováno v:
The Astrophysical Journal, Vol 960, Iss 1, p 2 (2023)
Asteroseismology is our only means of measuring the rotations of stars in their interiors, rather than at their surfaces. Some techniques for measurements of this kind—“rotational inversions”—require the shapes of linear response kernels comp
Externí odkaz:
https://doaj.org/article/e0d63f835bfa4e2492395796552fc399
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 1, p 19 (2023)
Asteroseismology has been used extensively in recent years to study the interior structure and physical processes of main-sequence stars. We consider prospects for using pressure modes (p-modes) near the frequency of maximum oscillation power to prob
Externí odkaz:
https://doaj.org/article/841921b145ae40e4b87cbcffa7022ee4
Publikováno v:
The Astrophysical Journal, Vol 947, Iss 1, p 22 (2023)
While solar-like oscillations in red giants have been observed at massive scales by the Kepler mission, few features of these oscillation mode frequencies, other than their global properties, have been exploited for stellar characterization. The sign
Externí odkaz:
https://doaj.org/article/2ed68d67a28d46d0aca00dec757552d9
Autor:
J. M. Joel Ong, Charlotte Gehan
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 92 (2023)
In the mixed-mode asteroseismology of subgiants and red giants, the coupling between the p- and g- mode cavities must be understood well in order to derive localized estimates of interior rotation from measurements of mode multiplet rotational splitt
Externí odkaz:
https://doaj.org/article/24f242d869b543e387b1d35f945b1689