Zobrazeno 1 - 10
of 248
pro vyhledávání: '"BUCK, TOBIAS"'
Autor:
Oliver, William H., Buck, Tobias
We demonstrate how the composition of two unsupervised clustering algorithms, $\texttt{AstroLink}$ and $\texttt{FuzzyCat}$, makes for a powerful tool when studying galaxy formation and evolution. $\texttt{AstroLink}$ is a general-purpose astrophysica
Externí odkaz:
http://arxiv.org/abs/2411.03229
Autor:
Storcks, Leonard, Buck, Tobias
We present jf1uids, a one-dimensional fluid solver that can, by virtue of a geometric formulation of the Euler equations, model radially symmetric fluid problems in a conservative manner, i.e., without losing mass or energy. For spherical problems, s
Externí odkaz:
http://arxiv.org/abs/2410.23093
We introduce CODES, a benchmark for comprehensive evaluation of surrogate architectures for coupled ODE systems. Besides standard metrics like mean squared error (MSE) and inference time, CODES provides insights into surrogate behaviour across multip
Externí odkaz:
http://arxiv.org/abs/2410.20886
Autor:
Ratcliffe, Bridget, Khoperskov, Sergey, Minchev, Ivan, Lee, Nathan D., Buck, Tobias, Marques, Léa, Lu, Lucy, Steinmetz, Matthias
Recent works identified a way to recover the time evolution of a galaxy's disk metallicity gradient from the shape of its age--metallicity relation. However, the success of the method is dependent on how the width of the star-forming region evolves o
Externí odkaz:
http://arxiv.org/abs/2410.17326
Autor:
Buck, Tobias, Schwarz, Christian
Recently, contrastive learning (CL), a technique most prominently used in natural language and computer vision, has been used to train informative representation spaces for galaxy spectra and images in a self-supervised manner. Following this idea, w
Externí odkaz:
http://arxiv.org/abs/2410.16081
Cosmological simulations are a powerful tool to advance our understanding of galaxy formation and many simulations model key properties of real galaxies. A question that naturally arises for such simulations in light of high-quality observational dat
Externí odkaz:
http://arxiv.org/abs/2410.10606
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:
Çakır, Ufuk, Buck, Tobias
Understanding the morphology of galaxies is a critical aspect of astrophysics research, providing insight into the formation, evolution, and physical properties of these vast cosmic structures. Various observational and computational methods have bee
Externí odkaz:
http://arxiv.org/abs/2409.10346
Autor:
Miro-Carretero, Juan, Gomez-Flechoso, Maria A., Martinez-Delgado, David, Cooper, Andrew P., Roca-Fabrega, Santi, Akhlaghi, Mohammad, Pillepich, Annalisa, Kuijken, Konrad, Erkal, Denis, Buck, Tobias, Hellwing, Wojciech A., Bose, Sownak, Donatiello, Giuseppe, Frenk, Carlos S.
According to the well established hierarchical framework for galaxy evolution, galaxies grow through mergers with other galaxies and the LambdaCDM cosmological model predicts that the stellar halos of massive galaxies are rich in remnants from minor
Externí odkaz:
http://arxiv.org/abs/2409.03585
Exploring the marks left by galactic accretion in the Milky Way helps us understand how our Galaxy was formed. However, finding and studying accreted stars and the galaxies they came from has been challenging. This study uses a simulation from the NI
Externí odkaz:
http://arxiv.org/abs/2404.13835