Results 51 to 60 of about 3,339,915 (332)

Uncertainties in Models of Stellar Structure and Evolution [PDF]

, 2014
peer reviewedNumerous physical aspects of stellar physics have been presented in Session 2 and the underlying uncertainties have been tentatively assessed.
Noels, Arlette, Bragaglia, Angela, Arlette Noels, Noels-Grötsch, Arlette, Angela Bragaglia   +4 more
core   +1 more source

Investigation of ρ Cas (HR 9045, HD 224014) stellar atmosphere [PDF]

Serbian Astronomical Journal
The atmosphere of hypergiant ρ Cas is investigated by the method of atmospheric model. Effective temperature and the surface of gravity are determined by comparing the observed and theoretical values of photometrical indices [c1];Q, and ...
Samedov Z.A., Hajieva G.M.
doaj   +1 more source

Inversions of Stellar Structure From Asteroseismic Data

Frontiers in Astronomy and Space Sciences, 2022
The advent of space-based photometry missions in the early 21st century enabled the application to asteroseismic data of advanced inference techniques until then restricted to the field of helioseismology.
Gaël Buldgen, Jérôme Bétrisey, Ian W. Roxburgh, Ian W. Roxburgh, Sergei V. Vorontsov, Sergei V. Vorontsov, Daniel R. Reese   +6 more
doaj   +1 more source

The extreme-ultraviolet stellar characterization for atmospheric physics and evolution (ESCAPE) mission concept

Optical Engineering + Applications, 2019
The long-term stability of exoplanetary atmospheres depends critically on the extreme-ultraviolet (EUV) flux from the host star. The EUV flux likely controls the demographics of the short-period planet population as well the ability for rocky planets to ...
K. France, B. Fleming, J. Drake, J. Mason, A. Youngblood, V. Bourrier, L. Fossati, C. Froning, T. Koskinen, N. Kruczek, S. Lipscy, R. McEntaffer, S. Romaine, O. Siegmund, E. Wilkinson   +14 more
semanticscholar   +1 more source

Influence of surface stressing on stellar coronae and winds [PDF]

, 2013
STFC funding has supported this research.The large-scale field of the Sun is well represented by its lowest energy (or potential) state. Recent observations, by comparison, reveal that many solar-type stars show large-scale surface magnetic fields that ...
Morin, J., Fares, R., Jardine, Moira, Donati, J. -F., Jardine, M., Morin, Julien, Fares, Rim, Donati, J.-F., Vidotto, A. A., Donati, Jean-François, Gombosi, T. I., van Ballegooijen, A., Gombosi, Tamas I., Jardine, M.; id_orcid   +13 more
core   +1 more source

Stellar Chromospheric Variability

, 2021
Cool stars with convective envelopes of spectral types F and later tend to exhibit magnetic activity throughout their atmospheres. The presence of strong and variable magnetic fields is evidenced by photospheric starspots, chromospheric plages and ...
Richard de Grijs, Devika Kamath
core   +1 more source

Looking into dark matter with asteroseismology

Frontiers in Astronomy and Space Sciences, 2022
Dark matter remains as an elusive component of modern Cosmology. According to previous research, stellar physics observables can be affected by the presence of hypothetical dark matter particles, which can be produced or accreted into the stars.
Adrián Ayala
doaj   +1 more source

Modules for Experiments in Stellar Astrophysics ( ): Convective Boundaries, Element Diffusion, and Massive Star Explosions [PDF]

, 2017
We update the capabilities of the software instrument Modules for Experiments in Stellar Astrophysics (MESA) and enhance its ease of use and availability.
B. Paxton, J. Schwab, E. Bauer, L. Bildsten, S. Blinnikov, P. Duffell, R. Farmer, J. Goldberg, P. Marchant, E. Sorokina, A. Thoul, R. Townsend, F. Timmes   +12 more
semanticscholar   +1 more source

Disentangling planetary orbits from stellar activity in radial-velocity surveys [PDF]

, 2013
The majority of extra-solar planets have been discovered (or confirmed after follow-up) through radial-velocity (RV) surveys. Using ground-based spectrographs such as High Accuracy Radial Velocity Planetary Search (HARPS) and HARPS-North, it is now ...
Segransan, Damien, Pollacco, Don, Fares, R, Pollacco, D, Queloz, D., Haywood, R.D., Pollacco, D., Gillon, M, Gillon, M., Barros, SCC, Lanza, AF, Pepe, F., Cameron, A. Collier, Hatzes, A., Ségransan, D., Lovis, C, Lovis, Christophe, Moutou, C, Barros, S. C. C., Santerne, A., Unruh, Y., Haywood, R. D., Unruh, Y, Fares, R., Segransan, D, Moutou, C., Deleuil, M., Barros, S.C.C., Cameron, AC, Lanza, A.F., Pepe, F, Deleuil, M, Haywood, RD, Gillon, Michaël, Pepe, Francesco Alfonso, Santerne, A, Queloz, Didier, Lovis, C., Cameron, A.C., Hatzes, A, Lanza, A. F., Queloz, D, Cameron, A.C.; id_orcid   +42 more
core   +1 more source

FAST STAR, SLOW STAR; OLD STAR, YOUNG STAR: SUBGIANT ROTATION AS A POPULATION AND STELLAR PHYSICS DIAGNOSTIC [PDF]

, 2013
Stellar rotation is a strong function of both mass and evolutionary state. Missions such as Kepler and CoRoT provide tens of thousands of rotation periods, drawn from stellar populations that contain objects at a range of masses, ages, and evolutionary ...
J. V. van Saders, M. Pinsonneault
semanticscholar   +1 more source