Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Raphaël Errani"'
Autor:
Simon Rozier, Raphaël Errani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 91 (2024)
Placed slightly out of dynamical equilibrium, an isolated stellar system quickly returns toward a steady virialized state. We study this process of collisionless relaxation using the matrix method of linear response theory. We show that the full phas
Externí odkaz:
https://doaj.org/article/465b3506309945a39fd35d7622b94ee4
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 89 (2024)
A fundamental prediction of the Lambda cold dark matter cosmology is the centrally divergent cuspy density profile of dark matter haloes. Density cusps render cold dark matter haloes resilient to tides, and protect dwarf galaxies embedded in them fro
Externí odkaz:
https://doaj.org/article/3046ee84193144408e706918fb3285e4
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 1, p 20 (2024)
The recently discovered stellar system Ursa Major III/UNIONS 1 (UMa3/U1) is the faintest known Milky Way satellite to date. With a stellar mass of ${16}_{-5}^{+6}\,{M}_{\odot }$ and a half-light radius of 3 ± 1 pc, it is either the darkest galaxy ev
Externí odkaz:
https://doaj.org/article/f331ac3b2baf49739a693c5e312775e1
Autor:
Simon E. T. Smith, William Cerny, Christian R. Hayes, Federico Sestito, Jaclyn Jensen, Alan W. McConnachie, Marla Geha, Julio F. Navarro, Ting S. Li, Jean-Charles Cuillandre, Raphaël Errani, Ken Chambers, Stephen Gwyn, Francois Hammer, Michael J. Hudson, Eugene Magnier, Nicolas Martin
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 92 (2024)
We present the discovery of Ursa Major III/UNIONS 1, the least luminous known satellite of the Milky Way, which is estimated to have an absolute V -band magnitude of $+{2.2}_{-0.3}^{+0.4}$ mag, equivalent to a total stellar mass of ${16}_{-5}^{+6}$ M
Externí odkaz:
https://doaj.org/article/0ac547a12b7d41008e0fb563b60ba654
Autor:
Raphaël Errani, Julio F Navarro, Rodrigo Ibata, Nicolas Martin, Zhen Yuan, David S Aguado, Piercarlo Bonifacio, Elisabetta Caffau, Jonay I González Hernández, Khyati Malhan, Rubén Sánchez-Janssen, Federico Sestito, Else Starkenburg, Guillaume F Thomas, Kim A Venn
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 514, 3532-3540. Oxford University Press
The recently discovered C-19 stellar stream is a collection of kinematically associated metal-poor stars in the halo of the Milky Way lacking an obvious progenitor. The stream spans an arc of ~15 degrees in the sky, and orbit-fitting suggests an apoc
Autor:
Zhen Yuan, Nicolas F Martin, Rodrigo A Ibata, Elisabetta Caffau, Piercarlo Bonifacio, Lyudmila I Mashonkina, Raphaël Errani, Amandine Doliva-Dolinsky, Else Starkenburg, Kim A Venn, Anke Arentsen, David S Aguado, Michele Bellazzini, Benoit Famaey, Morgan Fouesneau, Jonay I González Hernández, Pascale Jablonka, Carmela Lardo, Khyati Malhan, Julio F Navarro, Rubén Sánchez Janssen, Federico Sestito, Guillaume F Thomas, Akshara Viswanathan, Sara Vitali
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 514, 1664-1671. Oxford University Press
The C-19 stream is the most metal poor stellar system ever discovered, with a mean metallicity $[Fe/H] = -3.38\pm0.06$. Its low metallicity dispersion ($\sigma_{\rm [Fe/H]}$ $
Comment: 7 pages, 6 figures, accepted to MNRAS. The C-19 member list
Comment: 7 pages, 6 figures, accepted to MNRAS. The C-19 member list
The cuspy central density profiles of cold dark matter (CDM) haloes make them highly resilient to disruption by tides. Self-interactions between dark matter particles, or the cycling of baryons, may result in the formation of a constant-density core
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1596fd0ddbbec304ea0f5d0fff4800bc
http://arxiv.org/abs/2210.01131
http://arxiv.org/abs/2210.01131
We investigate ways to produce the bifurcation observed in the stellar stream of the Sagittarius dwarf galaxy (Sgr). Our method consists in running $N$-body simulations of Sgr falling into the Milky Way for the last 3~Gyr, with added test particles o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39891aceff014cff7ac3e9b9bd0bc251
http://arxiv.org/abs/2205.14902
http://arxiv.org/abs/2205.14902
Autor:
Isabel Santos-Santos, Azadeh Fattahi, Raphaël Errani, Alexandra Borukhovetskaya, Julio F. Navarro
Publikováno v:
Monthly notices of the Royal Astronomical Society, 2022, Vol.509(4), pp.5330-5339 [Peer Reviewed Journal]
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, ⟨10.1093/mnras/stab2912⟩
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, ⟨10.1093/mnras/stab2912⟩
The dark matter (DM) content of the Fornax dwarf spheroidal galaxy inferred from its kinematics is substantially lower than expected from LCDM cosmological simulations. We use N-body simulations to examine whether this may be the result of Galactic t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cddff6cf63d3439a7bf7bd53ebcc9c5
https://doi.org/10.1093/mnras/stab2912
https://doi.org/10.1093/mnras/stab2912
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2022, Vol.512(4), pp.5247-5257 [Peer Reviewed Journal]
The unusually low velocity dispersion and large size of Crater II pose a challenge to our understanding of dwarf galaxies in the Lambda Cold Dark Matter (LCDM) cosmogony. The low velocity dispersion suggests either a dark halo mass much lower than th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e2526543dfaa3e88a50932539c96b17
https://hal.archives-ouvertes.fr/hal-03495819
https://hal.archives-ouvertes.fr/hal-03495819