Results 11 to 20 of about 120,003 (344)

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   +5 more sources

Resolving the gravitational redshift across a millimetre-scale atomic sample [PDF]

Nature, 2021
Einstein’s theory of general relativity states that clocks at different gravitational potentials tick at different rates relative to lab coordinates—an effect known as the gravitational redshift1.
T. Bothwell, C. Kennedy, A. Aeppli, D. Kedar, J. Robinson, E. Oelker, A. Staron, Jun Ye   +7 more
semanticscholar   +1 more source

A massive quiescent galaxy at redshift 4.658 [PDF]

Nature, 2023
The extremely rapid assembly of the earliest galaxies during the first billion years of cosmic history is a major challenge for our understanding of galaxy formation physics^ 1 – 5 .
A. Carnall, R. McLure, J. Dunlop, D. McLeod, V. Wild, F. Cullen, D. Magee, R. Begley, A. Cimatti, C. Donnan, M. Hamadouche, S. M. Jewell, Sam Walker   +12 more
semanticscholar   +1 more source

Stress testing ΛCDM with high-redshift galaxy candidates [PDF]

Nature Astronomy, 2022
Early James Webb Space Telescope (JWST) results suggest a high level of star formation in the first 500 million years of the Universe. A study of the available mass from dark matter haloes shows that unexpectedly high-mass JWST galaxy candidates may ...
M. Boylan-Kolchin
semanticscholar   +1 more source

Discovery and properties of ultra-high redshift galaxies (9 < z < 12) in the JWST ERO SMACS 0723 Field [PDF]

Monthly notices of the Royal Astronomical Society, 2022
We present a reduction and analysis of the James Webb Space Telescope (JWST) SMACS 0723 field using new post-launch calibrations to conduct a search for ultra-high-redshift galaxies (z > 9) present within the Epoch of Reionisation.
N. Adams, C. Conselice, L. Ferreira, D. Austin, J. Trussler, I. Juodžbalis, S. Wilkins, J. Caruana, P. Dayal, A. Verma, A. Vijayan   +10 more
semanticscholar   +1 more source

A Luminous Quasar at Redshift 7.642 [PDF]

, 2021
Distant quasars are unique tracers to study the formation of the earliest supermassive black holes (SMBHs) and the history of cosmic reionization. Despite extensive efforts, only two quasars have been found at z ≥ 7.5, due to a combination of their low ...
Feige Wang, Jinyi Yang, Xiaohui Fan, J. Hennawi, A. Barth, E. Bañados, F. Bian, K. Boutsia, T. Connor, F. Davies, R. Decarli, A. Eilers, E. Farina, R. Green, Linhua Jiang, Jiangtao Li, C. Mazzucchelli, R. Nanni, J. Schindler, B. Venemans, F. Walter, Xue-bing Wu, M. Yue   +22 more
semanticscholar   +1 more source

Amazon Redshift Re-invented

SIGMOD Conference, 2022
In 2013, AmazonWeb Services revolutionized the data warehousing industry by launching Amazon Redshift, the first fully-managed, petabyte-scale, enterprise-grade cloud data warehouse.
Nikos Armenatzoglou, Sanuj Basu, Naga Bhanoori, Mengchu Cai, Naresh Chainani, Kiran Chinta, Venkatraman Govindaraju, Todd J. Green, Monish Gupta, Sebastian Hillig, Eric Hotinger, Yan Leshinksy, Jintian Liang, Michael McCreedy, F. Nagel, Ippokratis Pandis, Panos Parchas, R. Pathak, Orestis Polychroniou, Foyzur Rahman, Gaurav Saxena, Gokul Soundararajan, Sriram Subramanian, Doug Terry   +23 more
semanticscholar   +1 more source

The physical properties of star-forming galaxies in the low-redshift universe [PDF]

, 2003
We present a comprehensive study of the physical properties of ∼ 10 5 galaxies with measurable star formation in the Sloan Digital Sky Survey (SDSS). By comparing physical information extracted from the emission lines with continuum properties, we build ...
J. Brinchmann, S. Charlot, S. Charlot, S. White, C. Tremonti, C. Tremonti, G. Kauffmann, T. Heckman, J. Brinkmann   +8 more
semanticscholar   +1 more source

An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5 [PDF]

Nature, 2017
Quasars are the most luminous non-transient objects known and as a result they enable studies of the Universe at the earliest cosmic epochs. Despite extensive efforts, however, the quasar ULAS J1120 + 0641 at redshift z = 7.09 has remained the only one ...
E. Bañados, B. Venemans, C. Mazzucchelli, E. Farina, F. Walter, Feige Wang, R. Decarli, D. Stern, Xiaohui Fan, F. Davies, J. Hennawi, R. Simcoe, M. Turner, H. Rix, Jinyi Yang, D. Kelson, G. Rudie, J. Winters   +17 more
semanticscholar   +1 more source

Relativistic redshift of the star S0-2 orbiting the Galactic Center supermassive black hole [PDF]

Science, 2019
Gravitational redshift in the Galactic Center General relativity predicts that light emitted by an object in a strong gravitational field—for example, close to a black hole—should be shifted to longer wavelengths.
T. Do, A. Hees, A. Ghez, G. Martinez, D. Chu, S. Jia, S. Sakai, Jessica R. Lu, A. Gautam, K. K. O’neil, E. Becklin, M. Morris, K. Matthews, S. Nishiyama, R. Campbell, S. Chappell, Zhuo Chen, A. Ciurlo, A. Dehghanfar, E. Gallego-Cano, W. E. Kerzendorf, J. Lyke, S. Naoz, H. Saida, R. Schödel, M. Takahashi, Yohsuke Takamori, G. Witzel, P. Wizinowich   +28 more
semanticscholar   +1 more source