Zobrazeno 1 - 10
of 2 805
pro vyhledávání: '"Sestito A"'
Autor:
Vitali, Sara, Rojas-Arriagada, Alvaro, Jofré, Paula, Sestito, Federico, Povick, Joshua, Hill, Vanessa, Fernández-Alvar, Emma, Ardern-Arentsen, Anke, Jablonka, Pascale, Martin, Nicolas F., Starkenburg, Else, Aguado, David
The Sagittarius dwarf spheroidal galaxy (Sgr dSph) is a satellite orbiting the Milky Way that has experienced multiple stripping events due to tidal interactions with our Galaxy. Its accretion history has led to a distinct stellar overdensity, which
Externí odkaz:
http://arxiv.org/abs/2412.06896
Autor:
Sestito, Federico, Fernandez-Alvar, Emma, Brooks, Rebecca, Olson, Emma, Carigi, Leticia, Jofre, Paula, Silva, Danielle de Brito, Eldridge, Camilla J. L., Vitali, Sara, Venn, Kim A., Hill, Vanessa, Ardern-Arentsen, Anke, Kordopatis, Georges, Martin, Nicolas F., Navarro, Julio F., Starkenburg, Else, Tissera, Patricia B., Jablonka, Pascale, Lardo, Carmela, Lucchesi, Romain, Buck, Tobias, Amayo, Alexia
We analyse high-resolution ESPaDOnS/CFHT spectra of 20 very metal-poor stars ([Fe/H]~$<-2.0$) in the solar neighbourhood (within $\sim2$ kpc) selected to be on planar orbits (with a maximum height of $\lesssim4$ kpc). Targets include 11 prograde and
Externí odkaz:
http://arxiv.org/abs/2409.13813
Autor:
Viswanathan, Akshara, Byström, Amanda, Starkenburg, Else, Foppen, Anne, Straat, Jill, Montelius, Martin, Sestito, Federico, Venn, Kim A., Navarrete, Camila, Matsuno, Tadafumi, Martin, Nicolas F., Thomas, Guillaume F., Ardern-Arentsen, Anke, Battaglia, Giuseppina, Fouesneau, Morgan, Navarro, Julio, Vitali, Sara
Context: In the context of Galactic archaeology, the outer halo remains relatively unexplored with respect to its metallicity distribution, merger debris, and the abundance of known very/extremely metal-poor ([Fe/H]<-2.5) stars. Aim: We utilize the P
Externí odkaz:
http://arxiv.org/abs/2408.17250
Autor:
Sitnova, T. M., Yuan, Z., Matsuno, T., Mashonkina, L. I., Alexeeva, S. A., Holmbeck, E., Sestito, F., Lombardo, L., Banerjee, P., Martin, N. F., Jiang, F.
Dwarf galaxy streams encode vast amounts of information essential to understanding early galaxy formation and nucleosynthesis channels. Due to the variation in the timescales of star formation history in their progenitors, stellar streams serve as `s
Externí odkaz:
http://arxiv.org/abs/2408.16107
Modern hardware architectures for Convolutional Neural Networks (CNNs), other than targeting high performance, aim at dissipating limited energy. Reducing the data movement cost between the computing cores and the memory is a way to mitigate the ener
Externí odkaz:
http://arxiv.org/abs/2408.10243
In order to follow the ever-growing computational complexity and data intensity of state-of-the-art AI models, new computing paradigms are being proposed. These paradigms aim at achieving high energy efficiency, by mitigating the Von Neumann bottlene
Externí odkaz:
http://arxiv.org/abs/2408.01254
Autor:
Sestito, Federico, Ardern-Arentsen, Anke, Vitali, Sara, Montelius, Martin, Lucchesi, Romain, Venn, Kim A., Martin, Nicolas F., Navarro, Julio F., Starkenburg, Else
Publikováno v:
A&A 690, A333 (2024)
We aim to constrain the chemo-dynamical properties of the Sagittarius (Sgr) dwarf galaxy using carbon abundances. Our sample from the \textit{Pristine} Inner Galaxy Survey (PIGS) includes $\sim 350$ metal-poor ([Fe/H]~$<-1.5$) stars in the main body
Externí odkaz:
http://arxiv.org/abs/2406.18636
Autor:
de La Vernhe, Isaure González Rivera, Hill, Vanessa, Kordopatis, Georges, Gran, Felipe, Fernández-Alvar, Emma, Ardern-Arentsen, Anke, Thomas, Guillaume F., Sestito, Federico, Navarrete, Camila, Martin, Nicolas F., Starkenburg, Else, Viswanathan, Akshara, Battaglia, Giuseppina, Venn, Kim A., Vitali, Sara
Through the chemodynamical characterisation of metal-poor stars, one can efficiently probe the early history of the Milky Way. We aim at decontaminating a sample of $\sim$ 3M giant stars with Gaia DR3 XP-based \textit{Pristine-Gaia} metallicities, to
Externí odkaz:
http://arxiv.org/abs/2406.05728
Autor:
Viswanathan, Akshara, Yuan, Zhen, Ardern-Arentsen, Anke, Starkenburg, Else, Martin, Nicolas F., Youakim, Kris, Ibata, Rodrigo A., Sestito, Federico, Matsuno, Tadafumi, Prieto, Carlos Allende, Barwell, Freya, Bayer, Manuel, Doliva-Dolinsky, Amandine, Fernandez-Alvar, Emma, Anta, Pablo M. Galan-de, Jhass, Kiran, Longeard, Nicolas, Arroyo-Polonio, Jose Maria, Massana, Pol, Montelius, Martin, Rusterucci, Samuel, Santos, Judith, Thomas, Guillaume F., Vitali, Sara, Wu, Wenbo, Yarker, Paige, Ye, Xianhao, Aguado, David S., Gran, Felipe, Navarro, Julio
The Pristine-\textit{Gaia} synthetic catalogue provides reliable photometric metallicities for $\sim$30 million FGK stars using the Pristine survey model and Gaia XP spectra. We perform the first low-to-medium-resolution spectroscopic follow-up of br
Externí odkaz:
http://arxiv.org/abs/2405.13124
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
Publikováno v:
A&A 689, A201 (2024)
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