Results 1 to 10 of about 209,680 (298)

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   +5 more sources

Optical Characteristics of Electromagnetic Radiation, Emitted by Particles or Stars Moving near Supermassive Black Hole

Galaxies, 2021
The general problem of calculating of the propagation of electromagnetic radiation from particles or stars moving in the vicinity of a supermassive black hole is considered in geometrical optics approximation within the framework of the general theory of
Stanislav Komarov
doaj   +1 more source

Electromagnetic Waves in Cosmological Spacetime

Universe, 2023
We consider the propagation of electromagnetic waves in the Friedmann–Lemaître–Robertson–Walker metric. The exact solutions for plane and spherical wave are written down. The corresponding redshift, amplitude change, and dispersion are discussed. We also
Denitsa Staicova, Michail Stoilov
doaj   +1 more source

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. We present an efficient method for measuring the evolution of the growth of structure using Redshift Space Distortions (RSD), that ...
Ruggeri, Rossana, Percival, Will, Gil-Marín, Héctor, Zhu, Fangzhou, Zhao, Gong-Bo, Wang, Yuting   +5 more
openaire   +7 more sources

Using Multivariate Imputation by Chained Equations to Predict Redshifts of Active Galactic Nuclei

Frontiers in Astronomy and Space Sciences, 2022
Redshift measurement of active galactic nuclei (AGNs) remains a time-consuming and challenging task, as it requires follow up spectroscopic observations and detailed analysis.
Spencer James Gibson, Aditya Narendra, Maria Giovanna Dainotti, Maria Giovanna Dainotti, Malgorzata Bogdan, Malgorzata Bogdan, Agnieszka Pollo, Agnieszka Pollo, Artem Poliszczuk, Enrico Rinaldi, Enrico Rinaldi, Enrico Rinaldi, Ioannis Liodakis   +12 more
doaj   +1 more source

BLAST: THE REDSHIFT SURVEY [PDF]

The Astrophysical Journal, 2009
Accepted for publication in the Astrophysical Journal. Maps and associated results are available at http://blastexperiment.info/
Eales, Stephen, Chapin, Edward L., Devlin, Mark J., Dye, Simon, Halpern, Mark, Hughes, David H., Marsden, Gaelen, MAUSKOPF, PHILIP, Moncelsi, Lorenzo, Netterfield, Calvin B., PASCALE, ENZO, Patanchon, Guillaume, Raymond, Gwenifer, Rex, Marie, Scott, Douglas, Semisch, Christopher, Siana, Brian, Truch, Matthew D. P., Viero, Marco P.   +18 more
openaire   +4 more sources

Measurement methods for gamma-ray bursts redshifts

Frontiers in Astronomy and Space Sciences, 2023
In the era of multi-messenger astronomy, gamma-ray bursts (GRBs) with known redshifts, especially high-redshift GRBs, are a powerful tool for studying the structure and evolution of the early Universe.
Mengci Li, Mengci Li, Zhe Kang, Chao Wu, Chengzhi Liu, Chengzhi Liu, Jirong Mao, Jirong Mao, Zhenwei Li, Shiyu Deng, Shiyu Deng, Bingli Niu, Bingli Niu, Ping Jiang, Ping Jiang   +14 more
doaj   +1 more source

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   +3 more sources

Coelenterazine Indicators for the Specific Imaging of Human and Bovine Serum Albumins

Sensors, 2023
Albumin assays in serum are important for the prognostic assessment of many life-threatening diseases, such as heart failure, liver disease, malnutrition, inflammatory bowel disease, infections, and kidney disease. In this study, synthetic coelenterazine
Sung-Bae Kim, Genta Kamiya, Tadaomi Furuta, Nobuo Kitada, Shojiro A. Maki   +4 more
doaj   +1 more source

A Theoretical Study of Interband Absorption Spectra of Spherical Sector Quantum Dots under the Effect of a Powerful Resonant Laser

Nanomaterials, 2023
We explore the variation of interband absorption spectra of GaAs spherical sector quantum dots (QDs) in response to a strong resonant laser, using the renormalized wave function method. Even though a spherical sector QD appears identical to a section cut
Le Thi Dieu Hien, Le Thi Ngoc Bao, Duong Dinh Phuoc, Hye Jung Kim, C. A. Duque, Dinh Nhu Thao   +5 more
doaj   +1 more source