Results 11 to 20 of about 170,764 (173)

Cosmological parameters [PDF]

Second international workshop on particle physics and the early universe (COSMO-98), 1999
The discussion of cosmological parameters used to be a source of embarrassment to cosmologists. Today, measurements of the cosmological parameters are leading the way into the era of precision cosmology. The CMB temperature is measured to four significant figures, T_0=2.7277+/-0.002 K; the Hubble constant is now determined with a reliable error ...
Turner, Michael S.
core   +6 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
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Probing Cosmological Parameters with GRBs [PDF]

AIP Conference Proceedings, 2004
In light of the recent finding of the narrow clustering of the geometrically-corrected gamma-ray energies emitted by Gamma Ray Bursts (GRBs), we investigate the possibility to use these sources as standard candles to probe cosmological parameters such as the matter density Omega_m and the cosmological constant energy density Omega_Lambda. By simulating
Di Girolamo, T., Vietri, M., Di Sciascio, G.   +2 more
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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 interplay between observations and experiment and theory.
de Bernardis P., Peebles P. J. E., Stompor R., W. L. FREEDMAN, York D. C.   +4 more
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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
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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 ...
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Interacting galaxies and cosmological parameters [PDF]

, 2006
We propose a (physical)-geometrical method to measure the present rates of the density cosmological parameters for a Friedmann-Lemaitre universe. The distribution of linear separations between two interacting galaxies,when both of them undergo a first ...
Barnes, Berger, Blanchard, Chen, Croom, Dashveski, Demianski, Djorgovski, Dyer, Goldhabber, Guerra, Gurvits, H. Reboul, J.-P. Cordoni, Kellermann, Le Fèvre, Lemaître, Lima, Mihos, Reboul, Reboul, Remijan, Riess, Robertson, Sahni, Sanders, Schmidt, Springel, Steidel, Tolman, Toomre, Vanderriest, Véron, Zhu, Zhu, Zhu   +35 more
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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
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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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