Results 51 to 60 of about 219,246 (225)

Complementarity of the redshift drift [PDF]

Physical Review D, 2011
Accepted for publication in Phys. Rev.
Bruno Moraes, David Polarski
openaire   +3 more sources

On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts

The Astrophysical Journal, 2023
For gamma-ray bursts (GRBs) with durations greater than two seconds (so-called long GRBs), the intrinsic prompt gamma-ray emission appears, on average, to last longer for bursts at lower redshifts.
Nicole Lloyd-Ronning, Jarrett Johnson, Roseanne M. Cheng, Ken Luu, Phoebe Upton Sanderbeck, Lailani Kenoly, Celia Toral   +6 more
doaj   +1 more source

Photometric redshifts and quasar probabilities from a single, data-driven generative model

, 2012
We describe a technique for simultaneously classifying and estimating the redshift of quasars. It can separate quasars from stars in arbitrary redshift ranges, estimate full posterior distribution functions for the redshift, and naturally incorporate ...
Abazajian, Abell, Adam D. Myers, Aihara, Assef, Atlee, Ball, Ball, Baum, Benjamin A. Weaver, Benítez, Bovy, Bowen, Budavári, Butler, David Schiminovich, David W. Hogg, Donald P. Schneider, Eisenstein, Erin S. Sheldon, Fan, Francis, Glikman, Gunn, Gunn, Hennawi, Hennawi, Hennawi, Hennawi, Hogg, Hook, Hopkins, Hutchings, Ivezić, Ivezić, Ivezić, Jimenez, Jo Bovy, Jon Brinkmann, Joseph F. Hennawi, Jurić, Kaczmarczik, Kelly, Kozłowski, Kozłowski, Lupton, MacLeod, MacLeod, Martin, Morrissey, Myers, Myers, Myers, Myers, Møller, Padmanabhan, Peth, Picard, Pier, Prochaska, Richard G. McMahon, Richards, Richards, Richards, Richards, Richards, Richards, Richards, Ross, Schlegel, Schmidt, Schneider, Scranton, Scranton, Shen, Smith, Stoughton, Suchkov, Trammell, Vanden Berk, Weinstein, Worseck, Yip, York   +83 more
core   +1 more source

High Redshift Candidates and the Nature of Small Galaxies in the Hubble Deep Field [PDF]

, 2003
We present results on two related topics: 1. A discussion of high redshift candidates (z>4.5), and 2. A study of very small galaxies at intermediate redshifts, both sets being detected in the region of the northern Hubble Deep Field covered by deep ...
Lisa J. Storrie‐Lombardi, Ray J. Weymann, Roche N., Rodger I. Thompson   +3 more
core   +2 more sources

Redshift and Photon Energy Attenuation Constant in Vacuum

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki
There obtained an estimate of the minimum value of the photon energy attenuation constant in vacuum α: α = 8 · 10–19 m–1 based on quantum concepts of the structure of vacuum and data on the red shift of the emitter spectra of distant galaxies. Presumably,
A. A. Kurayev, V. V. Matveyenka
doaj   +1 more source

Improved redshifts for SDSS quasar spectra [PDF]

, 2010
A systematic investigation of the relationship between different redshift estimation schemes for more than 91000 quasars in the Sloan Digital Sky Survey (SDSS) Data Release 6 (DR6) is presented.
Abazajian, Adelman-McCarthy, Adelman-McCarthy, Bajtlik, Baldwin, Becker, Boroson, Croom, Gaskell, Gibson, Heckman, Hewett, Kirkman, Nestor, Padmanabhan, Paul C. Hewett, Richards, Schneider, Schneider, Shen, Stoughton, Tonry, Tytler, Tytler, Vanden Berk, Vanden Berk, Vivienne Wild, Wild, Wild, Wild, York   +30 more
core   +2 more sources

Redshifts and Killing vectors [PDF]

American Journal of Physics, 2006
Current approaches to physics stress the importance of conservation laws due to spacetime and internal symmetries. In special and general relativity the generators of these symmetries are known as Killing vectors. We use them for the rigorous determination of gravitational and cosmological redshifts.
Alex Harvey, Eugene J Surowitz, Engelbert L Schucking   +2 more
openaire   +3 more sources

An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission

, 2006
We propose an improved version of the redshift indicator developed by Atteia (2003), which gets rid of the dependence on the burst duration and provides better estimates for high-redshift GRBs.
Atteia, Jean-Luc, Collaboration, the the HETE Science Team, Lamb, Don Q., Pélangeon, Alexandre, Ricker, George R.   +4 more
core   +2 more sources

The Star Formation Rate Intensity Distribution Function--Implications for the Cosmic Star Formation Rate History of the Universe [PDF]

, 2001
We address the effects of cosmological surface brightness dimming on observations of faint galaxies by examining the distribution of "unobscured" star formation rate intensities versus redshift.
Alberto Fernandez‐Soto, Hsiao‐Wen Chen, Kenneth M. Lanzetta, Madau P., Noriaki Yahata, Sebastian Pascarelle, Storrie-Lombardi L. J.   +6 more
core   +3 more sources

Lower bounds on photometric redshift errors from Type Ia supernovae templates [PDF]

, 2009
Cosmology with Type Ia supernovae heretofore has required extensive spectroscopic follow-up to establish a redshift. Though tolerable at the present discovery rate, the next generation of ground-based all-sky survey instruments will render this approach ...
Asztalos, Bolzonella, Hsiao, Huterer, Jain, K. Cook, L. Wang, Nugent, Perlmutter, Riess, S. Asztalos, S. Nikolaev, S. Olivier, Tegmark, W. de Vries, Wagers, Wang, Weinberg, Wittman, Wood-Vasey, Zhan   +20 more
core   +3 more sources