Results 11 to 20 of about 171,556 (244)

Cosmological parameters in the noncommutative inflation [PDF]

Physics Letters B, 2004
We investigate how the uncertainty of noncommutative spacetime could explain the WMAP data. For this purpose, the spectrum is divided into the IR and UV region.
Bardeen, Bennett, Brandenberger, Brandenberger, Bridle, Cai, Calcagni, Fukuma, Fukuma, Fukuma, Huang, Huang, Huang, Kim, Kim, Kim, Kim, Kodama, Li, Liddle, Lizzi, Lukash, Lukash, Martin, Martin, Mukhanov, Mukhanov, Mukherjee, Peiris, Polchinski, Sasaki, Schwarz, Spergel, Stewart, Stewart, Stewart, Tsujikawa, Yoneya, Yoneya, Yun Soo Myung   +39 more
core   +4 more sources

The Measure of Cosmological Parameters

International Journal of Modern Physics A, 2002
New, large, ground and space telescopes are contributing to an exciting and rapid period of growth in observational cosmology. The subject is now far from its earlier days of being data-starved and unconstrained, and new data are fueling a healthy ...
de Bernardis P., Peebles P. J. E., Stompor R., W. L. FREEDMAN, York D. C.   +4 more
core   +2 more sources

Cosmological Parameters Are Dressed [PDF]

Physical Review Letters, 2003
In the context of the averaging problem in relativistic cosmology, we provide a key to the interpretation of cosmological parameters by taking into account the actual inhomogeneous geometry of the Universe. We discuss the relation between `bare' cosmological parameters determining the cosmological model, and the parameters interpreted by observers with
T. BUCHERT, CARFORA, MAURO
openaire   +3 more sources

Estimating cosmological parameter covariance [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
We investigate the bias and error in estimates of the cosmological parameter covariance matrix, due to sampling or modelling the data covariance matrix, for likelihood width and peak scatter estimators. We show that these estimators do not coincide unless the data covariance is exactly known. For sampled data covariances, with Gaussian distributed data
Taylor, Andy, Joachimi, Benjamin
openaire   +2 more sources

Measuring cosmological parameters [PDF]

Proceedings of the National Academy of Sciences, 1998
In this review, the status of measurements of the matter density (Ω m ), the vacuum energy density or cosmological constant (Ω Λ ), the Hubble constant ( H 0 ), and the ages of the oldest measured objects ( t 0 ) are ...
openaire   +3 more sources

Baryon Physics and Tight Coupling Approximation in Boltzmann Codes

Universe, 2019
We provide two derivations of the baryonic equations that can be straightforwardly implemented in existing Einstein−Boltzmann solvers. One of the derivations begins with an action principle, while the other exploits the conservation of the stress ...
Masroor C. Pookkillath, Antonio De Felice, Shinji Mukohyama   +2 more
doaj   +1 more source

The Cosmological Parameters 2006 [PDF]

, 2006
25 pages TeX file. Article for The Review of Particle Physics 2006 (aka the Particle Data Book), published version at http://pdg.lbl.gov/ . This article supersedes astro-ph/0406681. Updated to match published version.
Lahav, O., Liddle, Andrew
openaire   +2 more sources

Sampling the Probability Distribution of Type Ia Supernova Lightcurve Parameters in Cosmological Analysis [PDF]

, 2016
In order to obtain robust cosmological constraints from Type Ia supernova (SN Ia) data, we have applied Markov Chain Monte Carlo (MCMC) to SN Ia lightcurve fitting. We develop a method for sampling the resultant probability density distributions (pdf) of
Dai, Mi, Wang, Yun
core   +3 more sources

The Atacama Cosmology Telescope: DR4 maps and cosmological parameters [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from the Atacama Cosmology Telescope, using data taken from 2013–2016 at 98 and 150 GHz. The maps cover more than 17,000 deg2, the deepest 600 deg2with noise levels below 10μK-arcmin.
Aiola, Simone, Calabrese, Erminia, Maurin, Loïc, Naess, Sigurd, Schmitt, Benjamin L., Abitbol, Maximilian H., Addison, Graeme E., Ade, Peter A.R., Alonso, David, Amiri, Mandana, Amodeo, Stefania, Angile, Elio, Austermann, Jason E., Baildon, Taylor, Battaglia, Nick, Beall, James A., Bean, Rachel, Becker, Daniel T., Bond, J.Richard, Bruno, Sarah Marie, Calafut, Victoria, Campusano, Luis E., Carrero, Felipe, Chesmore, Grace E., Cho, Hsiao-Mei, Choi, Steve K., Clark, Susan E., Cothard, Nicholas F., Crichton, Devin, Crowley, Kevin T., Darwish, Omar, Datta, Rahul, Denison, Edward V., Devlin, Mark J., Duell, Cody J., Duff, Shannon M., Duivenvoorden, Adriaan J., Dunkley, Jo, Dünner, Rolando, Essinger-Hileman, Thomas, Fankhanel, Max, Ferraro, Simone, Fox, Anna E., Fuzia, Brittany, Gallardo, Patricio A., Gluscevic, Vera, Golec, Joseph E., Grace, Emily, Gralla, Megan, Guan, Yilun, Hall, Kirsten, Halpern, Mark, Han, Dongwon, Hargrave, Peter, Hasselfield, Matthew, Helton, Jakob M., Henderson, Shawn, Hensley, Brandon, Colin Hill, J., Hilton, Gene C., Hilton, Matt, Hincks, Adam D., Hložek, Renée, Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Huffenberger, Kevin M., Hughes, John P., Infante, Leopoldo, Irwin, Kent, Jackson, Rebecca, Klein, Jeff, Knowles, Kenda, Koopman, Brian, Kosowsky, Arthur, Lakey, Vincent, Li, Dale, Li, Yaqiong, Li, Zack, Lokken, Martine, Louis, Thibaut, Lungu, Marius, Macinnis, Amanda, Madhavacheril, Mathew, Maldonado, Felipe, Mallaby-Kay, Maya, Marsden, Danica, Mcmahon, Jeff, Menanteau, Felipe, Moodley, Kavilan, Morton, Tim, Namikawa, Toshiya, Nati, Federico, Newburgh, Laura, Nibarger, John P., Nicola, Andrina, Niemack, Michael D., Nolta, Michael R., Orlowski-Sherer, John, Page, Lyman A., Pappas, Christine G., Partridge, Bruce, Phakathi, Phumlani, Pisano, Giampaolo, Prince, Heather, Puddu, Roberto, Qu, Frank J., Rivera, Jesus, Robertson, Naomi, Rojas, Felipe, Salatino, Maria, Schaan, Emmanuel, Schillaci, Alessandro, Sehgal, Neelima, Sherwin, Blake D., Sierra, Carlos, Sievers, Jon, Sifon, Cristobal, Sikhosana, Precious, Simon, Sara, Spergel, David N., Staggs, Suzanne T., Stevens, Jason, Storer, Emilie, Sunder, Dhaneshwar D., Switzer, Eric R., Thorne, Ben, Thornton, Robert, Trac, Hy, Treu, Jesse, Tucker, Carole, Vale, Leila R., van Engelen, Alexander, van Lanen, Jeff, Vavagiakis, Eve M., Wagoner, Kasey, Wang, Yuhan, Ward, Jonathan T., Wollack, Edward J., Xu, Zhilei, Zago, Fernando, Zhu, Ningfeng   +140 more
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Constraining the Cosmological Parameters using Strong Lensing [PDF]

, 2001
We investigate the potentiality of using strong lensing clusters to constrain the cosmological parameters Omega_m and Omega_lambda. The existence of a multiple image system with known redshift allows, for a given (Omega_m, Omega_lambda) cosmology ...
Aguirre, Bacon, Balbi, Blandford, Bolzonella, Bézecourt, Bézecourt, Campusano, Chiba, Cooray, Cooray, Célérier, Efstathiou, Faber, Falco, Fernández-Soto, Freedman, G. Golse, G. Soucail, Gautret, Helbig, Hu, J.-P. Kneib, Jaffe, Kneib, Kneib, Kneib, Kochanek, Kolatt, Kovner, Link, Lombardi, Maoli, Melchiorri, Mellier, Natarajan, Natarajan, Natarajan, Navarro, Paczynski, Perlmutter, Riess, Sahni, Smail, Smith, Tonry, Turner, Turner, Van Waerbeke, Van Waerbeke, Warren, White, Williams, Wittman, Zaldarriaga   +54 more
core   +2 more sources