Results 1 to 10 of about 334,520 (391)

Optimal Redshift Weighting For Redshift Space Distortions [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
The low statistical errors on cosmological parameters promised by future galaxy surveys will only be realised with the development of new, fast, analysis methods that reduce potential systematic problems to low levels.
Gil-Marín, Héctor, Percival, Will, Ruggeri, Rossana, Wang, Yuting, Zhao, Gongbo, Zhu, Fangzhou   +5 more
core   +9 more sources

The 2dF Galaxy Redshift Survey: spectra and redshifts [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
The 2dF Galaxy Redshift Survey (2dFGRS) is designed to measure redshifts for approximately 250 000 galaxies. This paper describes the survey design, the spectroscopic observations, the redshift measurements and the survey data base. The 2dFGRS uses the 2dF multifibre spectrograph on the Anglo-Australian Telescope, which is capable of observing 400 ...
Colless, Matthew, Dalton, Gavin, Maddox, Steve, Sutherland, Will, Norberg, Peder, Cole, Shaun, Bland-Hawthorn, Joss, Bridges, Terry, Cannon, Russell, Collins, Chris, Couch, Warrick, Cross, Nicholas, Deeley, Kathryn, De Propris, Roberto, Driver, Simon P., Efstathiou, George, Ellis, Richard S., Frenk, Carlos S., Glazebrook, Karl, Jackson, Carole, Lahav, Ofer, Lewis, Ian, Lumsden, Stuart, Madgwick, Darren, Peacock, John A., Peterson, Bruce A., Price, Ian, Seaborne, Mark, Taylor, Keith, 2dFGRS Team   +29 more
openaire   +7 more sources

Six Peaks Visible in the Redshift Distribution of 46,400 SDSS Quasars Agree with the Preferred Redshifts Predicted by the Decreasing Intrinsic Redshift Model [PDF]

Astrophys.J.648:140-147,2006, 2006
The redshift distribution of all 46,400 quasars in the Sloan Digital Sky Survey (SDSS) Quasar Catalog III, Third Data Release, is examined. Six Peaks that fall within the redshift window below z = 4, are visible. Their positions agree with the preferred redshift values predicted by the decreasing intrinsic redshift (DIR) model, even though this model ...
Bajan K., Bajan K., Box T. C., Burbidge G., D. McDiarmid, Karlsson K. G., Karlsson K. G., Karlsson K. G., Lake R. G., M. B. Bell, Roeder R. C.   +10 more
arxiv   +4 more sources

Exploring the SDSS Photometric Galaxies with Clustering Redshifts [PDF]

, 2015
We apply clustering-based redshift inference to all extended sources from the Sloan Digital Sky Survey photometric catalogue, down to magnitude r = 22. We map the relationships between colours and redshift, without assumption of the sources' spectral energy distributions (SED).
Budavári, Tamás, Mendez, Alexander J., Morrison, Christopher B., Ménard, Brice, Rahman, Mubdi, Schmidt, Samuel J., Scranton, Ryan   +6 more
arxiv   +3 more sources

High-Redshift Cosmography [PDF]

Journal of Cosmology and Astroparticle Physics, 2010
We constrain the parameters describing the kinematical state of the universe using a cosmographic approach, which is fundamental in that it requires a very minimal set of assumptions (namely to specify a metric) and does not rely on the dynamical ...
, A.G. Riess ., B.E. Schaefer, C. Cattoen, C. Cattoen, C. Firmani, C. Shapiro, G. Ghirlanda, H. Lampeitl ., H. Li ., H. Wei, J.-Q. Xia, Jun-Qing Xia, M. Hicken ., M. Visser, Matteo Viel, P. McDonald, S. Weinberg, Stefano Liberati, Supernova Cosmology Project collaboration, Vincenzo Vitagliano   +20 more
core   +8 more sources

Non-cosmological redshifts [PDF]

Space Science Reviews, 1977
L’introduction de lignes d’univers brisées dans la théorie de la gravitation de Hoyle et Narlikar permet de rendre compte de la création de matière. Cette matière qui se compose de masses inertielles plus petites se manifeste par des décalages spectraux vers le rouge anormaux.
J. V. Narlikar
openalex   +4 more sources

Puzzlement about thermal redshift [PDF]

Physics Letters A, 1997
Discussed is the classical theoretical description of the experimentally established thermal redshift of spectral lines. Straightforward calculation of the observable spectrum from a canonical ensamble of monochromatic radiators yileds overall blueshift ...
Blatter, Clark, Combourieu, Compton, Dehn, Indebetouw, Jackson, James, Jaynes, Josephson, Jüttner, Kandpal, Kidd, Pound, Shapiro, Shapiro, Singwi, Trooster, Van Hove, Van Vleck, Vesselin I. Dimitrov, Wolf   +21 more
core   +3 more sources

High-z radio galaxies and the `Youth-Redshift Degeneracy' [PDF]

arXiv, 1999
We discuss a unifying explanation for many `trends with redshift' of radio galaxies which includes the relevance of their ages (time since their jet triggering event), and the marked dependence of their ages on redshift due to the selection effect of imposing a flux-limit.
Blundell, Katherine, Rawlings, Steve
arxiv   +4 more sources

On estimating redshift and luminosity distributions in photometric redshift surveys [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
The luminosity functions of galaxies and quasars provide invaluable information about galaxy and quasar formation. Estimating the luminosity function from magnitude limited samples is relatively straightforward, provided that the distances to the objects
Sheth, Ravi K.
core   +7 more sources

Generalized redshift formula through an energy-based framework [PDF]

Scientific Reports
Redshift is a crucial concept in physics; it has significant implications for our understanding of the dynamics and evolution of the cosmos. In this article, we introduce a generalized formula to determine the redshift parameter.
C. Ortiz, F. Ibarra-Castor
doaj   +2 more sources