Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Aguilera-Gómez, Claudia"'
Autor:
Sestito, Federico, Vitali, Sara, Jofre, Paula, Venn, Kim A., Aguado, David S., Aguilera-Gómez, Claudia, Ardern-Arentsen, Anke, Silva, Danielle de Brito, Carlberg, Raymond, Eldridge, Camilla J. L., Gran, Felipe, Hill, Vanessa, Jablonka, Pascale, Kordopatis, Georges, Martin, Nicolas F., Matsuno, Tadafumi, Rusterucci, Samuel, Starkenburg, Else, Viswanathan, Akshara
The most metal-poor stars provide valuable insights into the early chemical enrichment history of a system, carrying the chemical imprints of the first generations of supernovae. The most metal-poor region of the Sagittarius dwarf galaxy remains inad
Externí odkaz:
http://arxiv.org/abs/2405.00096
Low-mass giants with large amounts of lithium (Li) have challenged stellar evolution for decades. One of the possibilities usually discussed to explain them involves the interaction with a close binary companion. This predicts that when compared agai
Externí odkaz:
http://arxiv.org/abs/2401.00049
Autor:
Walsen, Kurt, Jofré, Paula, Buder, Sven, Yaxley, Keaghan, Das, Payel, Yates, Robert, Hua, Xia, Signor, Theosamuele, Eldridge, Camilla, Rojas-Arriagada, Alvaro, Tissera, Patricia, Johnston, Evelyn, Aguilera-Gómez, Claudia, Zoccali, Manuela, Gilmore, Gerry, Foley, Robert
Stellar chemical abundances have proved themselves a key source of information for understanding the evolution of the Milky Way, and the scale of major stellar surveys such as GALAH have massively increased the amount of chemical data available. Howe
Externí odkaz:
http://arxiv.org/abs/2310.15107
Autor:
Silva, Danielle de Brito, Jofré, Paula, Tissera, Patricia B., Yaxley, Keaghan J., Jara, Jenny Gonzalez, Eldridge, Camilla J. L., Sillero, Emanuel, Yates, Robert M., Hua, Xia, Das, Payel, Aguilera-Gómez, Claudia, Johnston, Evelyn J., Rojas-Arriagada, Alvaro, Foley, Robert, Gilmore, Gerard
Phylogenetic methods have long been used in biology, and more recently have been extended to other fields - for example, linguistics and technology - to study evolutionary histories. Galaxies also have an evolutionary history, and fall within this br
Externí odkaz:
http://arxiv.org/abs/2310.12235
The orders of magnitude variation in lithium abundances of evolved stars have long been a puzzle. Diluted signals, ambiguous evolutionary states and unknown masses have made it challenging to both map the expected lithium signals and explain the anom
Externí odkaz:
http://arxiv.org/abs/2306.16465
Publikováno v:
A&A 670, A73 (2023)
Although not predicted by standard stellar evolution, the surface abundance of light elements, such as lithium (Li), carbon, and nitrogen, changes during the red giant branch (RGB) as a result of extra-mixing. This is associated usually with thermoha
Externí odkaz:
http://arxiv.org/abs/2207.08905
Known sources of lithium (Li) in the universe include the big bang, novae, asymptotic giant branch stars, and cosmic ray spallation. During their longer-lived evolutionary phases, stars are not expected to add to the Li budget of the Galaxy, but to l
Externí odkaz:
http://arxiv.org/abs/2109.13955
Autor:
Aguilera-Gómez, Claudia, Monaco, Lorenzo, Mucciarelli, Alessio, Salaris, Maurizio, Villanova, Sandro, Pancino, Elena
Publikováno v:
A&A 657, A33 (2022)
Lithium is one of the few elements produced during the Big Bang Nucleosynthesis in the early universe. Moreover, its fragility makes it useful as a proxy for stellar environmental conditions. As such, the lithium abundance in old systems is at the co
Externí odkaz:
http://arxiv.org/abs/2109.13951
High lithium-7 ($\mathrm{^7Li}$) abundances in giants are indicative of non-standard physical processes affecting the star. Mechanisms that could produce this signature include contamination from an external source, such as planets, or internal produ
Externí odkaz:
http://arxiv.org/abs/2005.14209