Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Rodrigo Ibata"'
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 2, p L26 (2024)
We introduce “Class Symbolic Regression” (Class SR), the first framework for automatically finding a single analytical functional form that accurately fits multiple data sets—each realization being governed by its own (possibly) unique set of f
Externí odkaz:
https://doaj.org/article/d7ba15e7421e4d1b9a52f7f63b70ce7d
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
Autor:
Rodrigo Ibata, Khyati Malhan, Wassim Tenachi, Anke Ardern-Arentsen, Michele Bellazzini, Paolo Bianchini, Piercarlo Bonifacio, Elisabetta Caffau, Foivos Diakogiannis, Raphael Errani, Benoit Famaey, Salvatore Ferrone, Nicolas F. Martin, Paola di Matteo, Giacomo Monari, Florent Renaud, Else Starkenburg, Guillaume Thomas, Akshara Viswanathan, Zhen Yuan
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 89 (2024)
We present an atlas and follow-up spectroscopic observations of 87 thin stream-like structures detected with the STREAMFINDER algorithm in Gaia DR3, of which 28 are new discoveries. Here, we focus on using these streams to refine mass models of the G
Externí odkaz:
https://doaj.org/article/698a786ac5b444cb9aeb73c3a98c4b67
Autor:
Marie Korsaga, Benoit Famaey, Jonathan Freundlich, Lorenzo Posti, Rodrigo Ibata, Christian Boily, Katarina Kraljic, D. Esparza-Arredondo, C. Ramos Almeida, Jean Koulidiati
Publikováno v:
The Astrophysical Journal Letters, Vol 952, Iss 2, p L41 (2023)
Observed scaling relations in galaxies between baryons and dark matter global properties are key to shed light on the process of galaxy formation and on the nature of dark matter. Here, we study the scaling relation between the neutral hydrogen (H i
Externí odkaz:
https://doaj.org/article/b960de7b3f634b93baffcaedc7abf2a1
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 99 (2023)
Symbolic regression (SR) is the study of algorithms that automate the search for analytic expressions that fit data. While recent advances in deep learning have generated renewed interest in such approaches, the development of SR methods has not been
Externí odkaz:
https://doaj.org/article/2ab99bac24e6422b931a32c38b43fc34
Autor:
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman, Andrew Dolphin, Andrew A. Cole, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, Thomas M. Brown, James S. Bullock, Michelle L. M. Collins, M. C. Cooper, Alis J. Deason, Aaron L. Dotter, Mark Fardal, Annette M. N. Ferguson, Tobias K. Fritz, Marla C. Geha, Karoline M. Gilbert, Puragra Guhathakurta, Rodrigo Ibata, Michael J. Irwin, Myoungwon Jeon, Evan N. Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 86 (2023)
We present the lifetime star formation histories (SFHs) for six ultrafaint dwarf (UFD; M _V > − 7.0, $4.9\lt {\mathrm{log}}_{10}({M}_{* }(z=0)/{M}_{\odot })\lt 5.5$ ) satellite galaxies of M31 based on deep color–magnitude diagrams constructed fr
Externí odkaz:
https://doaj.org/article/efdc31fc14f44af8aab3dadcb900d2b4
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb0f59290c52cf08337b4505979c2189
https://research.rug.nl/en/publications/20b66cbd-12b5-43e1-b867-e33b9afadf55
https://research.rug.nl/en/publications/20b66cbd-12b5-43e1-b867-e33b9afadf55
Autor:
Han Qu, Zhen Yuan, Amandine Doliva-Dolinsky, Nicolas F Martin, Xi Kang, Chengliang Wei, Guoliang Li, Yu Luo, Jiang Chang, Chaowei Tsai, Zhou Fan, Rodrigo Ibata
We predict the dwarf galaxy detection limits for the upcoming Chinese Space Station Telescope (CSST) survey that will cover 17,500 deg$^{2}$ of the sky with a wide field of view of 1.1 deg$^2$. The point-source depth reaches 26.3 mag in the $g$ band
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::969af450b2cfd40d5b42b0be0ba96e53
http://arxiv.org/abs/2212.10804
http://arxiv.org/abs/2212.10804
Autor:
Alice Minelli, Michele Bellazzini, Alessio Mucciarelli, Piercarlo Bonifacio, Rodrigo Ibata, Donatella Romano, Lorenzo Monaco, Elisabetta Caffau, Emanuele Dalessandro, Raffaele Pascale
We present metallicity and radial velocity for 450 bonafide members of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy, measured from high resolution (R~18000) FLAMES@VLT spectra. The targets were carefully selected (a) to sample the core of the m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34a62e0b0408e400f8d13bd92c416c05
http://arxiv.org/abs/2211.06727
http://arxiv.org/abs/2211.06727
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