Zobrazeno 1 - 10
of 403
pro vyhledávání: '"Kaurov, A."'
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 522 (2), 2747-2753 (2023)
We develop a Monte Carlo radiative transfer code to study the effect of turbulence with a finite correlation length on scattering of Lyman-alpha (Ly$\alpha$) photons propagating through neutral atomic hydrogen gas. We investigate how the effective me
Externí odkaz:
http://arxiv.org/abs/2208.13103
Detecting the 21-cm hyperfine transition from neutral hydrogen in the intergalactic medium is our best probe for understanding the astrophysical processes driving the Epoch of Reionisation (EoR). The primary means for a detection of this 21-cm signal
Externí odkaz:
http://arxiv.org/abs/2207.09082
Detecting the cosmic 21-cm signal during the Epoch of Reionisation and Cosmic Dawn will reveal insights into the properties of the first galaxies and advance cosmological parameter estimation. Until recently, the primary focus for astrophysical param
Externí odkaz:
http://arxiv.org/abs/2204.02544
In dusty cool-star outflow or ejection events around AGB or RCB-like stars, dust is accelerated by radiation from the star and coupled to the gas via collisional drag forces. But it has recently been shown that such dust-gas mixtures are unstable to
Externí odkaz:
http://arxiv.org/abs/2111.09335
Simulations of $^{60}$Fe entrained in ejecta from a near-Earth supernova: Effects of observer motion
Recent studies have shown that live (not decayed) radioactive $^{60}$Fe is present in deep-ocean samples, Antarctic snow, lunar regolith, and cosmic rays. $^{60}$Fe represents supernova (SN) ejecta deposited in the Solar System around $3 \, \rm Myr$
Externí odkaz:
http://arxiv.org/abs/2109.11242
Autor:
Dai, Liang, Kaurov, Alexander A., Sharon, Keren, Florian, Michael K., Miralda-Escudé, Jordi, Venumadhav, Tejaswi, Frye, Brenda, Rigby, Jane R., Bayliss, Matthew
We study the highly magnified arc SGAS J122651.3+215220 caused by a star-forming galaxy at $z_s=2.93$ crossing the lensing caustic cast by the galaxy cluster SDSS J1226+2152 ($z_l=0.43$), using Hubble Space Telescope observations. We report in the ar
Externí odkaz:
http://arxiv.org/abs/2001.00261
Autor:
Ahmed, Zeeshan, Alonso, David, Amin, Mustafa A., Ansari, Réza, Arena, Evan J., Bandura, Kevin, Beardsley, Adam, Bull, Philip, Castorina, Emanuele, Chang, Tzu-Ching, Davé, Romeel, Dillon, Joshua S., van Engelen, Alexander, Ewall-Wice, Aaron, Ferraro, Simone, Foreman, Simon, Frisch, Josef, Green, Daniel, Holder, Gilbert, Jacobs, Daniel, Karagiannis, Dionysios, Kaurov, Alexander A., Knox, Lloyd, Kuhn, Emily, Liu, Adrian, Ma, Yin-Zhe, Masui, Kiyoshi W., McClintock, Thomas, Moodley, Kavilan, Münchmeyer, Moritz, Newburgh, Laura B., Nomerotski, Andrei, O'Connor, Paul, Obuljen, Andrej, Padmanabhan, Hamsa, Parkinson, David, Perdereau, Olivier, Rapetti, David, Saliwanchik, Benjamin, Sehgal, Neelima, Shaw, J. Richard, Sheehy, Chris, Sheldon, Erin, Shirley, Raphael, Silverstein, Eva, Slatyer, Tracy, Slosar, Anže, Stankus, Paul, Stebbins, Albert, Timbie, Peter, Tucker, Gregory S., Tyndall, William, Villaescusa-Navarro, Francisco, Wulf, Dallas
Development of the hardware, data analysis, and simulation techniques for large compact radio arrays dedicated to mapping the 21 cm line of neutral hydrogen gas has proven to be more difficult than imagined twenty years ago when such telescopes were
Externí odkaz:
http://arxiv.org/abs/1907.13090
Autor:
Blakeslee, J. P., Rodney, S. A., Lotz, J. M., Sivo, G., Sivanandam, S., Andersen, M., Carrasco, R., Ferrarese, L., Foley, R. J., Goodsell, S., Hirst, P., Jensen, J. B., Kelly, P. L., Kaurov, A. A., Lemoine-Busserolle, M., Miller, B. W., O'Meara, J., Roe, H., Schwamb, M. E., Scharwächter, J.
Two groundbreaking new facilities will commence operations early in the 2020s and thereafter define much of the broad landscape of US optical-infrared astronomy in the remaining decade. The Large Synoptic Survey Telescope (LSST), perched atop Cerro P
Externí odkaz:
http://arxiv.org/abs/1903.08184
We examine a caustic-straddling arc at $z=0.9397$ in the field of the galaxy cluster MACS J0416.1-2403 ($z=0.397$) using archival multiband HST images and show that its surface brightness exhibits anomalies that can be explained by a single highly ma
Externí odkaz:
http://arxiv.org/abs/1902.10090
Publikováno v:
JCAP03(2019)009
We present a non-perturbative calculation of the 1-point probability distribution function (PDF) for the spherically-averaged matter density field. The PDF is represented as a path integral and is evaluated using the saddle-point method. It factorize
Externí odkaz:
http://arxiv.org/abs/1811.07913