Zobrazeno 1 - 10
of 18 573
pro vyhledávání: '"Valle G"'
We compared stellar radii derived from asteroseismic scaling relations with those estimated using two independent surface brightness-colour relations (SBCRs) and Gaia DR3 parallaxes. We cross-matched asteroseismic and astrometric data for over 6,400
Externí odkaz:
http://arxiv.org/abs/2409.10050
By adopting the recently empirically derived dependence of $\alpha$-elements on $[\alpha/{\rm Fe}]$ instead of the conventionally applied uniform one, we tested the agreement between stellar model predictions and observations for red giant branch (RG
Externí odkaz:
http://arxiv.org/abs/2408.14900
We conducted an investigation on the chemical abundances of 4,316 stars in the red giant branch (RGB) phase from the recently released APO-K2 catalogue. Our aim was to characterize the abundance trends of the single elements with [$\alpha$/Fe], mainl
Externí odkaz:
http://arxiv.org/abs/2407.05960
Publikováno v:
A&A 687, A294 (2024)
We investigated the theoretical possibility of accurately determining the helium-to-metal enrichment ratio $\Delta Y/\Delta Z$ from precise observations of double lined eclipsing binary systems. Using Monte Carlo simulations, we drew synthetic binary
Externí odkaz:
http://arxiv.org/abs/2405.12075
We investigated the theoretical biases affecting the asteroseismic grid-based estimates of stellar parameters in the presence of a mismatch between the heavy element mixture of observed stars and stellar models. We performed a controlled simulation a
Externí odkaz:
http://arxiv.org/abs/2403.03070
Autor:
Coelho, H. R., Miglio, A., Morel, T., Lagarde, N., Bossini, D., Chaplin, W. J., Degl'Innocenti, S., Dell'Omodarme, M., Garcia, R. A., Handberg, R., Hekker, S., Huber, D., Lund, M. N., Mathur, S., Moroni, P. G. Prada, Mosser, B., Serenelli, A., Rainer, M., Nascimento Jr., J. D. do, Poretti, E., Mathias, P., Valle, G., Tio, P. Dal, Duarte, T.
Photometric time series gathered by space telescopes such as CoRoT and Kepler allow to detect solar-like oscillations in red-giant stars and to measure their global seismic constraints, which can be used to infer global stellar properties (e.g. masse
Externí odkaz:
http://arxiv.org/abs/2312.11233
Autor:
Sinelnik, A., Lam, S. H., Coviello, F., Klimmer, S., Della Valle, G., Choi, D. -Y., Pertsch, T., Soavi, G., Staude, I.
Optical communication can be revolutionized by encoding data into the orbital angular momentum of light beams. However, state-of-the-art approaches for dynamic control of complex optical wavefronts are mainly based on liquid crystal spatial light mod
Externí odkaz:
http://arxiv.org/abs/2311.05187
We estimate the impact on the stellar evolution of the uncertainties in the $3\alpha$ and the $^{12}{\rm C}(\alpha,\gamma)^{16}{\rm O}$ reaction rates [...]. We calculated models of low- and intermediate-mass stars for different values of the rates.
Externí odkaz:
http://arxiv.org/abs/2310.05745
Publikováno v:
A&A 678, A203 (2023)
We explore the robustness of the calibration of stellar models achievable with Ai Phe binary system. By means of the SCEPtER pipeline, we investigated the impact of different assumptions about the surface efficiency of microscopic diffusion. In the r
Externí odkaz:
http://arxiv.org/abs/2309.11837
Autor:
Nowell, David A.G.
Publikováno v:
In Proceedings of the Geologists' Association October 2023 134(5-6):659-661
