Zobrazeno 1 - 10
of 112 230
pro vyhledávání: '"Richard, S."'
Autor:
Katz, Harley, Cameron, Alex J., Saxena, Aayush, Barrufet, Laia, Choustikov, Nicholas, Cleri, Nikko J., de Graaff, Anna, Ellis, Richard S., Fosbury, Robert A. E., Heintz, Kasper E., Maseda, Michael, Matthee, Jorryt, McConchie, Ian, Oesch, Pascal A.
We study, from both a theoretical and observational perspective, the physical origin and spectroscopic impact of extreme nebular emission in high-redshift galaxies. The nebular continuum, which can appear during extreme starbursts, is of particular i
Externí odkaz:
http://arxiv.org/abs/2408.03189
We present an analysis of JWST Ly$\alpha$ spectroscopy of $z\gtrsim6.5$ galaxies, using observations in the public archive covering galaxies in four independent fields (GOODS-N, GOODS-S, Abell 2744, EGS). We measure Ly$\alpha$ emission line propertie
Externí odkaz:
http://arxiv.org/abs/2408.01507
Autor:
Dhawan, S., Pierel, J. D. R., Gu, M., Newman, A. B., Larison, C., Siebert, M., Petrushevska, T., Poidevin, F., Jha, S. W., Chen, W., Ellis, Richard S., Frye, B., Hjorth, J., Koekemoer, Anton M., Pérez-Fournon, I., Rest, A., Treu, T., Windhorst, R. A., Zenati, Y.
Strong gravitational lensing magnifies the light from a background source, allowing us to study these sources in detail. Here, we study the spectra of a $z = 1.95$ lensed Type Ia supernova SN~Encore for its brightest Image A, taken 39 days apart. We
Externí odkaz:
http://arxiv.org/abs/2407.16492
Autor:
Witten, Callum, McClymont, William, Laporte, Nicolas, Roberts-Borsani, Guido, Sijacki, Debora, Tacchella, Sandro, Simmonds, Charlotte, Katz, Harley, Ellis, Richard S., Witstok, Joris, Maiolino, Roberto, Ji, Xihan, Hayes, Billy R., Looser, Tobias J., D'Eugenio, Francesco
While JWST has observed galaxies assembling as early as $z\sim14$, evidence of galaxies with significant old stellar populations in the Epoch of Reionisation (EoR) -- the descendants of these earliest galaxies -- are few and far between. Bursty star-
Externí odkaz:
http://arxiv.org/abs/2407.07937
Autor:
Shapley, Alice E., Sanders, Ryan L., Topping, Michael W., Reddy, Naveen A., Berg, Danielle A., Bouwens, Rychard J., Brammer, Gabriel, Carnall, Adam C., Cullen, Fergus, Davé, Romeel, Dunlop, James S., Ellis, Richard S., Schreiber, N. M. Förster, Furlanetto, Steven R ., Glazebrook, Karl, Illingworth, Garth D., Jones, Tucker, Kriek, Mariska, McLeod, Derek J., McLure, Ross J., Narayanan, Desika, Oesch, Pascal, Pahl, Anthony J., Pettini, Max, Schaerer, Daniel, Stark, Daniel P., Steidel, Charles C., Tang, Mengtao, Clarke, Leonardo, Donnan, Callum T., Kehoe, Emily
We present results on the emission-line properties of z=1.4-7.5 star-forming galaxies in the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics (AURORA) Cycle 1 JWST/NIRSpec program. Based on its depth, continuous wavelength cover
Externí odkaz:
http://arxiv.org/abs/2407.00157
Autor:
Harikane, Yuichi, Inoue, Akio K., Ellis, Richard S., Ouchi, Masami, Nakazato, Yurina, Yoshida, Naoki, Ono, Yoshiaki, Sun, Fengwu, Sato, Riku A., Fujimoto, Seiji, Kashikawa, Nobunari, McLeod, Derek J., Perez-Gonzalez, Pablo G., Sawicki, Marcin, Sugahara, Yuma, Xu, Yi, Yamanaka, Satoshi, Carnall, Adam C., Cullen, Fergus, Dunlop, James S., Egami, Eiichi, Grogin, Norman, Isobe, Yuki, Koekemoer, Anton M., Laporte, Nicolas, Lee, Chien-Hsiu, Magee, Dan, Matsuo, Hiroshi, Matsuoka, Yoshiki, Mawatari, Ken, Nakajima, Kimihiko, Nakane, Minami, Tamura, Yoichi, Umeda, Hiroya, Yanagisawa, Hiroto
We present the number densities and physical properties of the bright galaxies spectroscopically confirmed at $z\sim7-14$. Our sample is composed of 53 galaxies at $z_\mathrm{spec}\sim7-14$, including recently-confirmed galaxies at $z_\mathrm{spec}=1
Externí odkaz:
http://arxiv.org/abs/2406.18352
Autor:
De Asis, Kris, Sutton, Richard S.
Many reinforcement learning algorithms are built on an assumption that an agent interacts with an environment over fixed-duration, discrete time steps. However, physical systems are continuous in time, requiring a choice of time-discretization granul
Externí odkaz:
http://arxiv.org/abs/2406.14951
Autor:
Clark, Carrie, Laugesen, Richard S.
Properties of Riesz capacity are developed with respect to the kernel exponent $p \in (-\infty,n)$, namely that capacity is monotonic as a function of $p$, that its endpoint limits recover the diameter and volume of the set, and that capacity is left
Externí odkaz:
http://arxiv.org/abs/2406.10781
Autor:
Jafariyazani, Marziye, Newman, Andrew B., Mobasher, Bahram, Belli, Sirio, Ellis, Richard S., Faisst, Andreas L.
Recent stellar chemical abundance measurements of a handful of $z\sim2$ quiescent galaxies have suggested these galaxies exhibit a remarkably strong $\alpha$-enhancement compared to their local and intermediate redshift counterparts. This apparent ch
Externí odkaz:
http://arxiv.org/abs/2406.03549
We show that discounted methods for solving continuing reinforcement learning problems can perform significantly better if they center their rewards by subtracting out the rewards' empirical average. The improvement is substantial at commonly used di
Externí odkaz:
http://arxiv.org/abs/2405.09999