Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Ardern-Arentsen, Anke"'
Autor:
Sestito, Federico, Ardern-Arentsen, Anke, Vitali, Sara, Montelius, Martin, Lucchesi, Romain, Venn, Kim A., Martin, Nicolas F., Navarro, Julio F., Starkenburg, Else
Carbon abundances, especially at low metallicity, reveal the early chemical evolution of a system, tracing the supernovae (SNe) that contributed and how much of their ejecta made it into the next stellar generation. Our sample from the \textit{Pristi
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:
Monty, Stephanie, Belokurov, Vasily, Sanders, Jason L., Hansen, Terese T., Sakari, Charli M., McKenzie, Madeleine, Myeong, GyuChul, Davies, Ellot Y., Ardern-Arentsen, Anke, Massari, Davide
We combine stellar orbits with the abundances of the heavy, $r$-process element europium and the light, $\alpha$-element, silicon to separate in-situ and accreted populations in the Milky Way across all metallicities. At high orbital energy, the accr
Externí odkaz:
http://arxiv.org/abs/2405.08963
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
Autor:
Fernández-Alvar, Emma, Kordopatis, Georges, Hill, Vanessa, Battaglia, Giuseppina, Gallart, Carme, de la Vernhe, Isaure González Rivera, Thomas, Guillaume, Sestito, Federico, Ardern-Arentsen, Anke, Martin, Nicolas, Viswanathan, Akshara, Starkenburg, Else
Publikováno v:
A&A 685, A151 (2024)
The emergence of the disc in our Galaxy and the relation of the thick and thin disc formation and evolution is still a matter of debate. The chemo-dynamical characterization of disc stars is key to resolve this question, in particular at parameter re
Externí odkaz:
http://arxiv.org/abs/2402.02943
Autor:
Ardern-Arentsen, Anke, Monari, Giacomo, Queiroz, Anna B. A., Starkenburg, Else, Martin, Nicolas F., Chiappini, Cristina, Aguado, David S., Belokurov, Vasily, Carlberg, Ray, Monty, Stephanie, Myeong, GyuChul, Schultheis, Mathias, Sestito, Federico, Venn, Kim A., Vitali, Sara, Yuan, Zhen, Zhang, Hanyuan, Buder, Sven, Lewis, Geraint F., Oliver, William H., Wan, Zhen, Zucker, Daniel B.
The oldest stars in the Milky Way (born in the first few billion years) are expected to have a high density in the inner few kpc, spatially overlapping with the Galactic bulge. We use spectroscopic data from the Pristine Inner Galaxy Survey (PIGS) to
Externí odkaz:
http://arxiv.org/abs/2312.03847
There has been a discussion for many years on whether the disc in the Milky Way extends down to low metallicity. We aim to address the question by employing a large sample of giant stars with radial velocities and homogeneous metallicities based on t
Externí odkaz:
http://arxiv.org/abs/2311.09294
Autor:
Yuan, Zhen, Li, Chengdong, Martin, Nicolas F., Monari, Giacomo, Famaey, Benoit, Siebert, Arnaud, Ardern-Arentsen, Anke, Sestito, Federico, Thomas, Guillaume F., Hill, Vanessa, Ibata, Rodrigo A., Kordopatis, Georges, Starkenburg, Else, Viswanathan, Akshara
The most metal-poor stars (e.g. [Fe/H] $\leq-2.5$) are the ancient fossils from the early assembly epoch of our Galaxy, very likely before the formation of the thick disc. Recent studies have shown that a non-negligible fraction of them have prograde
Externí odkaz:
http://arxiv.org/abs/2311.08464
Autor:
Viswanathan, Akshara, Starkenburg, Else, Matsuno, Tadafumi, Venn, Kim A., Martin, Nicolas F., Longeard, Nicolas, Ardern-Arentsen, Anke, Carlberg, Raymond G., Fabbro, Sebastien, Kordopatis, Georges, Montelius, Martin, Sestito, Federico, Yuan, Zhen
Publikováno v:
A&A 683, L11 (2024)
Context. Gaia DR3 has offered the scientific community a remarkable dataset of approximately one million spectra acquired with the Radial Velocity Spectrometer (RVS) in the Calcium II triplet region, that is well-suited to identify very metal-poor (V
Externí odkaz:
http://arxiv.org/abs/2309.06137