Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Costa G"'
Autor:
Nguyen, C. T., Bressan, A., Korn, A. J., Cescutti, G., Costa, G., Addari, F., Girardi, L., Fu, X., Chen, Y., Marigo, P.
Thermohaline mixing is one of the main processes in low-mass red giant stars that affect the transport of chemicals and, thus, the surface abundances along the evolution. The interplay of thermohaline mixing with other processes, such as the downward
Externí odkaz:
http://arxiv.org/abs/2408.05039
Autor:
Costa, G., Dumont, T., Lançon, A., Palacios, A., Charbonnel, C., Prugniel, P., Ekstrom, S., Georgy, C., Branco, V., Coelho, P., Martins, L., Borisov, S., Voggel, K., Chantereau, W.
A common property of globular clusters (GC) is to host multiple populations characterized by peculiar chemical abundances. Recent photometric studies suggest that the He content could vary between the populations of a GC by up to $\Delta$He $\sim$ 0.
Externí odkaz:
http://arxiv.org/abs/2405.16505
We present detailed abundance results based on UVES high dispersion spectra for 7 very and extremely metal-poor stars in the Large Magellanic Cloud. We confirm that all 7 stars, two of which have [Fe/H] $\leq$ --3.0, are the most metal-poor stars dis
Externí odkaz:
http://arxiv.org/abs/2312.12793
Autor:
Lecroq, M., Charlot, S., Bressan, A., Bruzual, G., Costa, G., Iorio, G., Spera, M., Mapelli, M., Chen, Y., Chevallard, J., Dall'Amico, M.
We investigate the nebular emission produced by young stellar populations using the new GALSEVN model based on the combination of the SEVN population-synthesis code including binary-star processes and the GALAXEV code for the spectral evolution of st
Externí odkaz:
http://arxiv.org/abs/2312.08432
We present results of a search for extremely metal-poor (EMP) stars in the Large Magellanic Cloud, which can provide crucial information about the properties of the first stars as well as on the formation conditions prevalent during the earliest stag
Externí odkaz:
http://arxiv.org/abs/2306.15492
Autor:
Milone, A. P., Cordoni, G., Marino, A. F., D'Antona, F., Bellini, A., Di Criscienzo, M., Dondoglio, E., Lagioia, E. P., Langer, N., Legnardi, M. V., Libralato, M., Baumgardt, H., Bettinelli, M., Cavecchi, Y., de Grijs, R., Deng, L., Hastings, B., Li, C., Mohandasan, A., Renzini, A., Vesperini, E., Wang, C., Ziliotto, T., Carlos, M., Costa, G., Dell'Agli, F., Di Stefano, S., Jang, S., Martorano, M., Simioni, M., Tailo, M., Ventura, P.
Publikováno v:
A&A 672, A161 (2023)
In the past years, we have undertaken an extensive investigation of LMC and SMC star clusters based on HST data. We present photometry and astrometry of stars in 101 fields observed with the WFC/ACS, UVIS/WFC3 and NIR/WFC3 cameras. These fields compr
Externí odkaz:
http://arxiv.org/abs/2212.07978
Autor:
Shpakov, V., Alesini, D., Anania, M. P., Behtouei, M., Buonomo, B., Bellaveglia, M., Biagioni, A., Cardelli, F., Carillo, M., Chiadroni, E., Cianchi, A., Costa, G., Del Giorno, M., Faillace, L., Ferrario, M., del Franco, M., Franzini, G., Galletti, M., Giannessi, L., Giribono, A., Liedl, A., Lollo, V., Mostacci, A., Di Pirro, G., Piersanti, L., Pompili, R., Di Raddo, G., Romeo, S., Silvi, G., Stella, A., Vaccarezza, C., Villa, F., Vannozzi, A.
In this article, we share our experience related to the new photo-injector commissioning at the SPARC\_LAB test facility. The new photo-injector was installed into an existing machine and our goal was not only to improve the final beam parameters the
Externí odkaz:
http://arxiv.org/abs/2212.05894
We use data from the Magellanic Edges Survey (MagES) in combination with Gaia EDR3 to study the extreme southern outskirts of the Small Magellanic Cloud (SMC), focussing on a field at the eastern end of a long arm-like structure which wraps around th
Externí odkaz:
http://arxiv.org/abs/2210.06657
Autor:
Da Costa, G. S., Bessell, M. S., Nordlander, Thomas, Hughes, Arvind C. N., Buder, Sven, Mackey, A. D., Spitler, Lee R., Zucker, D. B.
The advent of large-scale stellar spectroscopic surveys naturally leads to the implementation of machine learning techniques to isolate, for example, small sub-samples of potentially interesting stars from the full data set. A recent example is the a
Externí odkaz:
http://arxiv.org/abs/2210.05161
Autor:
Nguyen, C. T., Costa, G., Girardi, L., Volpato, G., Bressan, A., Chen, Y., Marigo, P., Fu, X., Goudfrooij, P.
Publikováno v:
A&A 665, A126 (2022)
We present a new comprehensive collection of stellar evolutionary tracks and isochrones for rotating low- and intermediate-mass stars assembled with the updated version of PARSEC V2.0. This version includes our recent calibration of the extra mixing
Externí odkaz:
http://arxiv.org/abs/2207.08642