Zobrazeno 1 - 10
of 1 425
pro vyhledávání: '"Spada F."'
Publikováno v:
A&A 673, A110 (2023)
Asteroseismic measurements of the internal rotation rate in evolved stars pointed out to a lack of angular momentum (AM) transport in stellar evolution models. Several physical processes in addition to hydrodynamical ones were proposed as candidates
Externí odkaz:
http://arxiv.org/abs/2302.07811
Autor:
Gaulme, P., Borkovits, T., Appourchaux, T., Pavlovski, K., Spada, F., Gehan, C., Ong, J., Miglio, A., Tkachenko, A., Mosser, B., Vrard, M., Benbakoura, M., Chojnowski, S. D., Perkins, J., Hedlund, A., Jackiewicz, J.
Publikováno v:
A&A 668, A173 (2022)
KIC 7955301 is a hierarchical triple system with eclipse timing and depth variations discovered by the Kepler mission. It is composed of a non-eclipsing primary star at the bottom of the red giant branch on a 209-day orbit with a K/G-type main-sequen
Externí odkaz:
http://arxiv.org/abs/2210.05312
Autor:
Benbakoura, M., Gaulme, P., McKeever, J., Sekaran, S., Beck, P. G., Spada, F., Jackiewicz, J., Mathis, S., Mathur, S., Tkachenko, A., García, R. A.
Publikováno v:
A&A 648, A113 (2021)
Eclipsing binaries (EBs) are unique benchmarks for stellar evolution. On the one hand, detached EBs hosting at least one star with detectable solar-like oscillations constitute ideal test objects to calibrate asteroseismic measurements. On the other
Externí odkaz:
http://arxiv.org/abs/2101.05351
Publikováno v:
A&A 641, A117 (2020)
Asteroseismic measurements of the internal rotation of subgiants and red giants all show the need for invoking a more efficient transport of angular momentum than theoretically predicted. Constraints on the core rotation rate are available starting f
Externí odkaz:
http://arxiv.org/abs/2007.02585
Autor:
Christensen-Dalsgaard, J., Aguirre, V. Silva, Cassisi, S., Bertolami, M. Miller, Serenelli, A., Stello, D., Weiss, A., Angelou, G., Jiang, C., Lebreton, Y., Spada, F., Bellinger, E. P., Deheuvels, S., Ouazzani, R. M., Pietrinferni, A., Mosumgaard, J. R., Townsend, R. H. D., Battich, T., Bossini, D., Constantino, T., Eggenberger, P., Hekker, S., Mazumdar, A., Miglio, A., Nielsen, K. B., Salaris, M.
Context. The large quantity of high-quality asteroseismic data that obtained from space-based photometric missions and the accuracy of the resulting frequencies motivate a careful consideration of the accuracy of computed oscillation frequencies of s
Externí odkaz:
http://arxiv.org/abs/2002.02816
Autor:
Aguirre, V. Silva, Christensen-Dalsgaard, J., Cassisi, S., Bertolami, M. Miller, Serenelli, A. M., Stello, D., Weiss, A., Angelou, G., Jiang, C., Lebreton, Y., Spada, F., Bellinger, E. P., Deheuvels, S., Ouazzani, R. M., Pietrinferni, A., Mosumgaard, J. R., Townsend, R. H. D., Battich, T., Bossini, D., Constantino, T., Eggenberger, P., Hekker, S., Mazumdar, A., Miglio, A., Nielsen, K. B., Salaris, M.
Publikováno v:
A&A 635, A164 (2020)
(Abridged). We introduce the Aarhus Red Giants Challenge, a series of detailed comparisons between widely used stellar evolution and oscillation codes aiming at establishing the minimum level of uncertainties in properties of red giants arising solel
Externí odkaz:
http://arxiv.org/abs/1912.04909
Autor:
Spada, F., Demarque, P.
We present models of alpha Centauri A and B implementing an entropy calibration of the mixing-length parameter alpha_MLT, recently developed and successfully applied to the Sun (Spada et al. 2018, ApJ, 869, 135). In this technique the value of alpha_
Externí odkaz:
http://arxiv.org/abs/1909.00701
Autor:
Spada, F., Lanzafame, A. C.
Solar-like stars (M < 1.3 Msun) lose angular momentum through their magnetized winds. The resulting evolution of the surface rotation period, which can be directly measured photometrically, has the potential to provide an accurate indicator of stella
Externí odkaz:
http://arxiv.org/abs/1908.00345
THz emission from Co/Pt bilayers with varied roughness, crystal structure, and interface intermixing
Autor:
Li, G., Medapalli, R., Mikhaylovskiy, R. V., Spada, F. E., Rasing, Th., Fullerton, E. E., Kimel, A. V.
Publikováno v:
Phys. Rev. Materials 3, 084415 (2019)
Femtosecond laser excitation of a Co/Pt bilayer results in the efficient emission of picosecond THz pulses. Two known mechanisms for generating THz emission are spin-polarized currents through a Co/Pt interface, resulting in helicity-independent elec
Externí odkaz:
http://arxiv.org/abs/1903.04423
Autor:
Eggenberger, P., Deheuvels, S., Miglio, A., Ekström, S., Georgy, C., Meynet, G., Lagarde, N., Salmon, S., Buldgen, G., Montalbán, J., Spada, F., Ballot, J.
Context: The observations of solar-like oscillations in evolved stars have brought important constraints on their internal rotation rates. To correctly reproduce these data, an efficient transport mechanism is needed in addition to meridional circula
Externí odkaz:
http://arxiv.org/abs/1812.04995