Zobrazeno 1 - 10
of 299
pro vyhledávání: '"LUGARO, Maria"'
The atmospheres of phosphorus-rich stars have been shown to contain between 10 and 100 times more P than our Sun. Given its crucial role as an essential element for life, it is especially necessary to uncover the origin of P-rich stars to gain insigh
Externí odkaz:
http://arxiv.org/abs/2408.12938
Publikováno v:
A&A 686, L8 (2024)
The $\gamma$-process in core-collapse supernovae (CCSNe) can produce a number of neutron-deficient stable isotopes heavier than iron (p-nuclei). However, current model predictions do to not fully reproduce the solar abundances. We investigate the imp
Externí odkaz:
http://arxiv.org/abs/2405.07783
Autor:
D'Orazi, Valentina, Storm, Nicholas, Casey, Andrew R., Braga, Vittorio F., Zocchi, Alice, Bono, Giuseppe, Fabrizio, Michele, Sneden, Christopher, Massari, Davide, Giribaldi, Riano E., Bergemann, Maria, Campbell, Simon W., Casagrande, Luca, de Grijs, Richard, De Silva, Gayandhi, Lugaro, Maria, Zucker, Daniel B., Bragaglia, Angela, Feuillet, Diane, Fiorentino, Giuliana, Chaboyer, Brian, Dall'Ora, Massimo, Marengo, Massimo, Martínez-Vázquez, Clara E., Matsunaga, Noriyuki, Monelli, Matteo, Mullen, Joseph P., Nataf, David, Tantalo, Maria, Thevenin, Frederic, Vitello, Fabio R., Kudritzki, Rolf-Peter, Bland-Hawthorn, Joss, Buder, Sven, Freeman, Ken, Kos, Janez, Lewis, Geraint F., Lind, Karin, Martell, Sarah, Sharma, Sanjib, Stello, Dennis, Zwitter, Tomaž
Stellar mergers and accretion events have been crucial in shaping the evolution of the Milky Way (MW). These events have been dynamically identified and chemically characterised using red giants and main-sequence stars. RR Lyrae (RRL) variables can p
Externí odkaz:
http://arxiv.org/abs/2405.04580
Autor:
Seshashayana, Shilpa Bijavara, Jönsson, Henrik, D'Orazi, Valentina, Nandakumar, Govind, Oliva, Ernesto, Bragaglia, Angela, Sanna, Nicoletta, Romano, Donatella, Spitoni, Emanuele, Karakas, Amanda, Lugaro, Maria, Origlia, Livia
The age, evolution, and chemical properties of the Galactic disk can be effectively ascertained using open clusters. Within the large program Stellar Populations Astrophysics at the Telescopio Nazionale Galileo, we specifically focused on stars in op
Externí odkaz:
http://arxiv.org/abs/2402.09058
Autor:
Pignatari, Marco, Trueman, Thomas C. L., Womack, Kate A., Gibson, Brad K., Côté, Benoit, Turrini, Diego, Sneden, Christopher, Mojzsis, Stephen J., Stancliffe, Richard J., Fong, Paul, Lawson, Thomas V., Keegans, James D., Pilkington, Kate, Passy, Jean-Claude, Beers, Timothy C., Lugaro, Maria
Theoretical physical-chemical models for the formation of planetary systems depend on data quality for the Sun's composition, that of stars in the solar neighbourhood, and of the estimated "pristine" compositions for stellar systems. The effective sc
Externí odkaz:
http://arxiv.org/abs/2307.12330
Autor:
Brauner, Maren, Masseron, Thomas, García-Hernández, D. A., Pignatari, Marco, Womack, Kate A., Lugaro, Maria, Hayes, Christian R.
Publikováno v:
A&A 673, A123 (2023)
The origin of phosphorus, one of the essential elements for life on Earth, is currently unknown. Prevalent models of Galactic chemical evolution (GCE) underestimate the amount of P compared to observations. The recently discovered P-rich ([P/Fe] > 1
Externí odkaz:
http://arxiv.org/abs/2303.12590
Autor:
Lugaro, Maria, Ek, Mattias, Pető, Mária, Pignatari, Marco, Makhatadze, Georgy V., Onyett, Isaac J., Schönbächler, Maria
Analysis of bulk meteorite compositions has revealed small isotopic variations due to the presence of material (e.g., stardust) that preserved the signature of nuclear reactions occurring in specific stellar sites. The interpretation of such anomalie
Externí odkaz:
http://arxiv.org/abs/2303.01100
Autor:
Wehmeyer, Benjamin, López, Andrés Yagüe, Côté, Benoit, Pető, Maria K., Kobayashi, Chiaki, Lugaro, Maria
Publikováno v:
The Astrophysical Journal, Volume 944, Issue 2, id.121 (2023)
While modelling the galactic chemical evolution (GCE) of stable elements provides insights to the formation history of the Galaxy and the relative contributions of nucleosynthesis sites, modelling the evolution of short-lived radioisotopes (SLRs) can
Externí odkaz:
http://arxiv.org/abs/2301.04593
Autor:
Lugaro, Maria, López, Andrés Yagüe, Soós, Benjámin, Côté, Benoit, Pető, Mária, Vassh, Nicole, Wehmeyer, Benjamin, Pignatari, Marco
Publikováno v:
Universe, 2022, vol. 8, issue 7, p. 343
We investigate the origin in the early Solar System of the short-lived radionuclide 244Pu (with a half life of 80 Myr) produced by the rapid (r) neutron-capture process. We consider two large sets of r-process nucleosynthesis models and analyse if th
Externí odkaz:
http://arxiv.org/abs/2208.02074
The origins of the elements and isotopes of cosmic material is a critical aspect of understanding the evolution of the universe. Nucleosynthesis typically requires physical conditions of high temperatures and densities. These are found in the Big Ban
Externí odkaz:
http://arxiv.org/abs/2206.12246