Zobrazeno 1 - 10
of 323
pro vyhledávání: '"Jackson, Ryan P."'
Autor:
Lazar, Ilin, Kaviraj, Sugata, Watkins, Aaron E., Martin, Garreth, Bichang'a, Brian, Jackson, Ryan A.
We use a complete sample of 211 nearby (z<0.08) dwarf (10^8 MSun < Mstar < 10^9.5 Msun) galaxies in low-density environments, to study their structural properties: effective radii (R_e), effective surface brightnesses (mu_e) and colour gradients. We
Externí odkaz:
http://arxiv.org/abs/2409.02169
Autor:
Lazar, Ilin, Kaviraj, Sugata, Watkins, Aaron E., Martin, Garreth, Bichang'a, Brian, Jackson, Ryan A.
We use a complete, unbiased sample of 257 dwarf (10^8 MSun < Mstar < 10^9.5 MSun) galaxies at z < 0.08, in the COSMOS field, to study the morphological mix of the dwarf population in low-density environments. Visual inspection of extremely deep optic
Externí odkaz:
http://arxiv.org/abs/2402.12440
Autor:
Lazar, Ilin, Kaviraj, Sugata, Martin, Garreth, Laigle, Clotilde, Watkins, Aaron E., Jackson, Ryan A.
Publikováno v:
MNRAS, 520, 2109 (2023)
How elliptical galaxies form is a key question in observational cosmology. While the formation of massive ellipticals is strongly linked to mergers, the low mass (Mstar < 10^9.5 MSun) regime remains less well explored. In particular, studying ellipti
Externí odkaz:
http://arxiv.org/abs/2302.06631
Autor:
Jeon, Seyoung, Yi, Sukyoung, Dubois, Yohan, Chung, Aeree, Devriendt, Julien, Han, San, Jackson, Ryan A., Kimm, Taysun, Pichon, Christophe, Rhee, Jinsu
Publikováno v:
2022 ApJ 941 5
Cluster galaxies exhibit substantially lower star formation rates than field galaxies today, but it is conceivable that clusters were sites of more active star formation in the early universe. Herein, we present an interpretation of the star formatio
Externí odkaz:
http://arxiv.org/abs/2210.05285
Autor:
Smith, Michael J., Geach, James E., Jackson, Ryan A., Arora, Nikhil, Stone, Connor, Courteau, Stéphane
We show that a Denoising Diffusion Probabalistic Model (DDPM), a class of score-based generative model, can be used to produce realistic mock images that mimic observations of galaxies. Our method is tested with Dark Energy Spectroscopic Instrument (
Externí odkaz:
http://arxiv.org/abs/2111.01713
Autor:
Dubois, Yohan, Beckmann, Ricarda, Bournaud, Frédéric, Choi, Hoseung, Devriendt, Julien, Jackson, Ryan, Kaviraj, Sugata, Kimm, Taysun, Kraljic, Katarina, Laigle, Clotilde, Martin, Garreth, Park, Min-Jung, Peirani, Sébastien, Pichon, Christophe, Volonteri, Marta, Yi, Sukyoung K.
Hydrodynamical cosmological simulations are increasing their level of realism by considering more physical processes and having greater resolution or larger statistics. However, usually either the statistical power of such simulations or the resoluti
Externí odkaz:
http://arxiv.org/abs/2009.10578
Autor:
Jackson, Ryan Blake, Williams, Tom
The design of current natural language oriented robot architectures enables certain architectural components to circumvent moral reasoning capabilities. One example of this is reflexive generation of clarification requests as soon as referential ambi
Externí odkaz:
http://arxiv.org/abs/2007.08670
Autor:
Volonteri, Marta, Pfister, Hugo, Beckman, Ricarda S., Dubois, Yohan, Colpi, Monica, Conselice, Christopher J., Dotti, Massimo, Martin, Garreth, Jackson, Ryan, Kraljic, Katarina, Pichon, Christophe, Trebitsch, Maxime, Yi, Sukyoung. K., Devriendt, Julien, Peirani, Sebastien
Massive black hole (MBH) coalescences are powerful sources of low-frequency gravitational waves. To study these events in the cosmological context we need to trace the large-scale structure and cosmic evolution of a statistical population of galaxies
Externí odkaz:
http://arxiv.org/abs/2005.04902
By facilitating the generation of samples from arbitrary probability distributions, Markov Chain Monte Carlo (MCMC) is, arguably, \emph{the} tool for the evaluation of Bayesian inference problems that yield non-standard posterior distributions. In re
Externí odkaz:
http://arxiv.org/abs/2004.12838
Autor:
Jackson, Ryan A., Martin, Garreth, Kaviraj, Sugata, Laigle, Clotilde, Devriendt, Julien, Dubois, Yohan, Pichon, Christophe
Galaxy merger histories correlate strongly with stellar mass, largely regardless of morphology. Thus, at fixed stellar mass, spheroids and discs share similar assembly histories, both in terms of the frequency of mergers and the distribution of their
Externí odkaz:
http://arxiv.org/abs/2004.00023