Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Thomas, Guillaume F."'
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:
Foote, Hayden R., Besla, Gurtina, Garavito-Camargo, Nicolás, Patel, Ekta, Thomas, Guillaume F., Bonaca, Ana, Price-Whelan, Adrian M., Peter, Annika H. G., Zaritsky, Dennis, Conroy, Charlie
Stellar streams in the Milky Way are promising detectors of low-mass dark matter (DM) subhalos predicted by $\Lambda$CDM. Passing subhalos induce perturbations in streams that indicate the presence of the subhalos. Understanding how known DM-dominate
Externí odkaz:
http://arxiv.org/abs/2408.06415
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:
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:
Thomas, Guillaume F., Famaey, Benoit, Monari, Giacomo, Laporte, Chervin F. P., Ibata, Rodrigo, de Laverny, Patrick, Hill, Vanessa, Boily, Christian
Tidal streams of disrupted clusters are routinely detected in the halo of the Milky Way. It was recently shown that tidal streams of open clusters can now also be detected within the disc. In this work, we highlight the fact that tidal streams provid
Externí odkaz:
http://arxiv.org/abs/2309.05733
Autor:
Põder, Sven, Benito, María, Pata, Joosep, Kipper, Rain, Ramler, Heleri, Hütsi, Gert, Kolka, Indrek, Thomas, Guillaume F.
Publikováno v:
A&A, 676 (2023) A134
Our goal is to calculate the circular velocity curve of the Milky Way, along with corresponding uncertainties that quantify various sources of systematic uncertainty in a self-consistent manner. The observed rotational velocities are described as cir
Externí odkaz:
http://arxiv.org/abs/2309.02895
Autor:
Martin, Nicolas F., Starkenburg, Else, Yuan, Zhen, Fouesneau, Morgan, Arentsen, Anke, De Angeli, Francesca, Gran, Felipe, Montelius, Martin, Andrae, René, Bellazzini, Michele, Montegriffo, Paolo, Esselink, Anna F., Zhang, Hanyuan, Venn, Kim A., Viswanathan, Akshara, Aguado, David S., Battaglia, Giuseppina, Bayer, Manuel, Bonifacio, Piercarlo, Caffau, Elisabetta, Côté, Patrick, Carlberg, Raymond, Fabbro, Sébastien, Alvar, Emma Fernández, Hernández, Jonay I. González, de La Vernhe, Isaure González Rivera, Hill, Vanessa, Ibata, Rodrigo A., Jablonka, Pascale, Kordopatis, Georges, Lardo, Carmela, McConnachie, Alan W., Navarrete, Camila, Navarro, Julio, Recio-Blanco, Alejandra, Janssen, Rubén Sánchez, Sestito, Federico, Thomas, Guillaume F., Vitali, Sara, Youakim, Kristopher
We use the spectro-photometric information of ~219 million stars from Gaia's DR3 to calculate synthetic, narrow-band, metallicity-sensitive CaHK magnitudes that mimic the observations of the Pristine survey, a survey of photometric metallicities of M
Externí odkaz:
http://arxiv.org/abs/2308.01344
Autor:
Arroyo-Polonio, José María, Battaglia, Giuseppina, Thomas, Guillaume F., Irwin, Michael J., McConnachie, Alan W., Tolstoy, Eline
Aims: We aim to compute the binary fraction of "classical" dwarf spheroidal galaxies (dSphs) that are satellites of the Milky Way (MW). This value can offer insights into the binary fraction in environments that are less dense and more metal-poor tha
Externí odkaz:
http://arxiv.org/abs/2307.10375
Autor:
Doliva-Dolinsky, Amandine, Martin, Nicolas F., Yuan, Zhen, Savino, Alessandro, Weisz, Daniel R., Ferguson, Annette M. N., Ibata, Rodrigo A., Kim, Stacy Y., Lewis, Geraint F., McConnachie, Alan W., Thomas, Guillaume F.
We build a statistical framework to infer the global properties of the satellite system of the Andromeda galaxy (M31) from the properties of individual dwarf galaxies located in the Pan-Andromeda Archaelogical Survey (PAndAS) and the previously deter
Externí odkaz:
http://arxiv.org/abs/2303.01528