Results 1 to 10 of about 2,275,942 (365)

Internal rotation of red giants by asteroseismology [PDF]

EPJ Web of Conferences, 2013
We present an asteroseismic approach to study the dynamics of the stellar interior in red giant stars by asteroseismic inversion of the splittings induced by the stellar rotation on the oscillation frequencies.
Christensen-Dalsgaard J., Mosser B., Hekker S., García R.A., Elsworth Y., Davies G., Beck P.G., Stello D., Ventura R., Di Mauro M.P., Cardini D., Bloemen S., Catanzaro G., De Smedt K., Tkachenko A.   +14 more
doaj   +10 more sources

Red-giant stars in eccentric binaries [PDF]

EPJ Web of Conferences, 2015
The unparalleled photometric data obtained by NASA’s Kepler Space Telescope has led to improved understanding of red-giant stars and binary stars. We discuss the characterization of known eccentric system, containing a solar-like oscillating red-giant ...
Beck P. G., Hambleton K., Vos J., Kallinger T., Garcia R. A., Mathur S., Houmani K.   +6 more
doaj   +9 more sources

Red giant seismology: Observations [PDF]

EPJ Web of Conferences, 2013
The CoRoT and Kepler missions provide us with thousands of red-giant light curves that allow a very precise asteroseismic study of these objects. Before CoRoT and Kepler, the red-giant oscillation patterns remained obscure.
Mosser B.
doaj   +3 more sources

A red giant orbiting a black hole [PDF]

Monthly Notices of the Royal Astronomical Society, 2023
We report spectroscopic and photometric follow-up of a dormant black hole (BH) candidate from Gaia DR3. The system, which we call Gaia BH2, contains a ∼1 M⊙ red giant and a dark companion with mass $M_2 = 8.9\pm 0.3\, {\rm M}_{\odot }$ that is very ...
K. El-Badry, H. Rix, Y. Cendes, Antonio C. Rodriguez, C. Conroy, E. Quataert, K. Hawkins, E. Zari, M. Hobson, K. Breivik, A. Rau, E. Berger, S. Shahaf, R. Seeburger, K. Burdge, D. Latham, L. Buchhave, A. Bieryla, D. Bashi, T. Mazeh, S. Faigler   +20 more
semanticscholar   +6 more sources

Rapidly rotating red giants [PDF]

EPJ Web of Conferences, 2017
Stellar oscillations give seismic information on the internal properties of stars. Red giants are targets of interest since they present mixed modes, wich behave as pressure modes in the convective envelope and as gravity modes in the radiative core ...
Gehan Charlotte, Mosser Benoît, Michel Eric   +2 more
doaj   +5 more sources

Theoretical Uncertainties in Red Giant Branch Evolution: The Red Giant Branch Bump [PDF]

The Astrophysical Journal, 2005
A Monte Carlo simulation exploring uncertainties in standard stellar evolution theory on the red giant branch of metal-poor globular clusters has been conducted.
Alongi M., Brian Chaboyer, Cassisi S., Cassisi S., Castellani V., Fusi Pecci F., Raffelt G. G., Salpeter E. E., Singh H. P., Stephan R. Bjork, Sweigart A. V., Weiss A.   +11 more
core   +6 more sources

Asteroseismology of red giants & galactic archaeology [PDF]

, 2017
Red-giant stars are low- to intermediate-mass ($M \lesssim 10$~M$_{\odot}$) stars that have exhausted hydrogen in the core. These extended, cool and hence red stars are key targets for stellar evolution studies as well as galactic studies for several ...
A. Baglin, A. Datta, A. Helmi, A. Miglio, B. Mosser, B. Mosser, B. Mosser, B. Mosser, B. Paxton, C. Aerts, C. Allende Prieto, C. Chiappini, D. Kawata, D. Stello, D. Yong, D.R. Soderblom, E. Böhm-Vitense, E. Guggenberger, E.P. Bellinger, G.C. Angelou, G.R. Ricker, H. Kjeldsen, H. Lamb, H. Rauer, H.-W. Rix, I. Minchev, I. Minchev, J. Bland-Hawthorn, J. Bovy, J. Christensen-Dalsgaard, J. Christensen-Dalsgaard, J. Kumamoto, J. Lattanzio, K. Belkacem, K. Freeman, K. Schwarzschild, L. Girardi, L. Lindegren, M. Bergemann, M. Gabriel, M. Martig, M. Martig, M. Ness, M. Ness, M. Ness, M. Tassoul, M.A.C. Perryman, M.R. Merrifield, N. Gai, N. Langer, O. Creevey, P. Gaulme, P. Goldreich, P. Goldreich, P. Jofré, P. Ledoux, R. Kippenhahn, R. Trampedach, R.K. Ulrich, S. Hekker, S. Hekker, S. Refsdal, S. Sharma, S.B. Howell, S.R. Loebman, T. Constantino, T. Kallinger, T.M. Brown, T.R. Bedding, T.R. White, V.M. Canuto, W.J. Borucki, W.J. Chaplin   +72 more
core   +4 more sources

On the red-giant luminosity bump [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
The increase in luminosity as a star evolves on the red-giant branch is interrupted briefly when the hydrogen-burning shell reaches the vicinity of the composition discontinuity left behind from the first convective dredge-up. The non-monotonic variation
J. Christensen-Dalsgaard
semanticscholar   +6 more sources

Winds from Red Giants [PDF]

International Astronomical Union Colloquium, 1988
AbstractTwo principal mechanisms that may be responsible for mass loss from red giants are considered: shock wave-driven winds and radiatively (dust)-driven winds. Effect of the periodic shocks accompanying nonlinear oscillations of red giants is most prominent in the outer layers of the stellar atmosphere where shocks are able not only to expel gas ...
Yu. A. Fadeyev
openalex   +3 more sources

Surface effects on the red giant branch [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Individual mode frequencies have been detected in thousands of individual solar-like oscillators on the red giant branch (RGB). Fitting stellar models to these mode frequencies, however, is more difficult than in main-sequence stars.
W. Ball, W. Ball, N. Themessl, N. Themessl, N. Themessl, S. Hekker, S. Hekker   +6 more
semanticscholar   +7 more sources