Results 21 to 30 of about 737 (162)

Cosmological constraints from the clustering of the Sloan Digital Sky Survey DR7 luminous red galaxies [PDF]

, 2009
We present the power spectrum of the reconstructed halo density field derived from a sample of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) Seventh Data Release (DR7).
Weinberg, D. H., Gunn, James E., Gott, J. Richard, York, D. G., Spergel, David N., Bahcall, Neta A., Knapp, Gillian R., McKay, T. A., Meiksin, A., Schlegel, D. J., Tegmark, M., Szalay, Alexander S., Zeljko, Ivezic, Percival, Will J., Lupton, Robert H., Kron, R. G., Pope, A. C., Frieman, Joshua A., York, Donald G., Meiksin, Avery, Tegmark, Max Erik, Szalay, A. S., Fukugita, M., Mckay, Timothy A., Schneider, D. P., Vogeley, M. S., Fukugita, Masataka, Zehavi, Idit, Verde, L., Reid, B. A., Gott, J. R., Vogeley, Michael S., Schlegel, David J., Weinberg, David H., Spergel, D. N., Strauss, M. A., Nichol, Robert C., Budavari, Tamas, Stoughton, Christopher, Ivezić, Željko, Ivezic, Z., Frieman, J. A., Stoughton, C., Bahcall, N. A., Nichol, R. C., Skibba, Ramin A., Knapp, G. R., Eisenstein, D. J., Schneider, Donald P., Percival, W. J., Eisenstein, Daniel J., Strauss, Michael A., Reid, Beth A., Pope, Adrian C., Stoughton, Chris, Zehavi, I., Tegmark, Max, Lupton, R. H., Skibba, Raman A., Budavari, T., Verde, Licia, Skibba, R. A., Kron, Richard G., Gunn, J. E.   +63 more
core   +1 more source

A Time-symmetric Hubble-like Law: Light Rays Grazing Randomly Moving Galaxies Show Distance-Proportional Redshift [PDF]

Zeitschrift für Naturforschung A, 2003
A new class of dissipative structures is proposed that live in real space rather than phase space. A light ray passing through a soup of randomly moving gravitating masses is a case in point. It suffers a “dynamic path elongation” since the random pushes and pulls have a greater probability of increasing than decreasing its path length.
O. E. Rössler, D. Fröhlich, N. Kleiner
openaire   +1 more source

The Lens Parallax Method: Determining Redshifts of Faint Blue Galaxies through Gravitational Lensing [PDF]

, 2019
We propose a new technique, which we call the lens parallax method, to determine simultaneously the redshift distribution of the faint blue galaxies and the mass distributions of foreground clusters of galaxies.
Narayan, Ramesh, Bartelmann, Matthias
core   +1 more source

Direct comparison of observed magnitude–redshift relations in complete galaxy samples with systematic predictions of alternative redshift–distance laws [PDF]

Monthly Notices of the Royal Astronomical Society, 1989
La magnitude apparente moyenne directement observee comme fonction du redshift dans chacun des echantillons complets de galaxies est comparee aux predictions des lois en puissance hypothetiques distance-redshift d'un point de vue ...
openaire   +1 more source

The scaling relation of early-type galaxies in clusters II. Spectroscopic data for galaxies in eight nearby clusters [PDF]

, 2006
Galaxies: elliptical and lenticulars, cD, distances and redshifts - clusters: general Udgivelsesdato ...
D. Bettoni, P. Kjærgaard, Moles, M., Varela, J., Rasmussen, Per Kjærgaard, Fasano, G., Bettoni, D., G. Fasano, M. Moles, J. Varela   +9 more
core   +1 more source

Searching for Highly Magnified Stars at Cosmological Distances: Discovery of a Redshift 0.94 Blue Supergiant in Archival Images of the Galaxy Cluster MACS J0416.1-2403 [PDF]

The Astrophysical Journal, 2019
Abstract Individual highly magnified stars have been recently discovered at lookback times of more than half the age of the universe, in lensed galaxies that straddle the critical curves of massive galaxy clusters. Having established their detectability, it is now important to carry out systematic searches for them in order to establish ...
Wenlei Chen, Patrick L. Kelly, Jose M. Diego, Masamune Oguri, Liliya L. R. Williams, Adi Zitrin, Tommaso L. Treu, Nathan Smith, Thomas J. Broadhurst, Nick Kaiser, Ryan J. Foley, Alexei V. Filippenko, Laura Salo, Jens Hjorth, Jonatan Selsing   +14 more
openaire   +5 more sources

Measuring the distance-redshift relation with the cross-correlation of gravitational wave standard sirens and galaxies [PDF]

Physical Review D, 2016
Gravitational waves from inspiraling compact binaries are known to be an excellent absolute distance indicator, yet it is unclear whether electromagnetic counterparts of these events are securely identified for measuring their redshifts, especially in the case of black hole-black hole mergers such as the one recently observed with the Advanced LIGO. We
openaire   +2 more sources

The THESEUS Space Mission and the Infrared Telescope Calibration Unit

Astronomische Nachrichten, EarlyView.
ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó, Rebeka Gyöngyi Kiss, Lorenzo Amati, Bendegúz Koncz, Örs Detre, Gyula Zilizi, Zsolt Bagoly, István I. Rácz, Sándor Pintér, L. Viktor Tóth   +9 more
wiley   +1 more source

Mapping the dynamics, star-formation rates, and chemical properties of galaxies with integral field spectroscopy [PDF]

, 2005
Major advances in the development of instruments for eight and ten meter class telescopes are revolutionising our understanding of galaxy formation. In particular, Integral Field Spectrographs (which produce a three dimensional {x, y, velocity) map of a ...
Swinbank, Anthony Mark, Swinback, Anthony Mark   +1 more
core  

The many flavours of photometric redshifts [PDF]

, 2018
International audienceSince more than 70 years ago, the colours of galaxies derived from flux measurements at different wavelengths have been used to estimate their cosmological distances.
Olivier Ilbert, Ilbert, O., Hoyle, Ben, Mara Salvato, Ben Hoyle, Hoyle, B., Salvato, M., Salvato, Mara, Ilbert, Olivier   +8 more
core   +1 more source