Results 11 to 20 of about 334,520 (391)

The redshift distribution of dusty star forming galaxies from the SPT survey [PDF]

, 2016
We use the Atacama Large Millimeter/submillimeter Array (ALMA) in Cycle 1 to determine spectroscopic redshifts of high-redshift dusty star-forming galaxies (DSFGs) selected by their 1.4mm continuum emission in the South Pole Telescope (SPT) survey.
Aguirre, J. E., Aravena, M., Ashby, M. L. N., Bradford, C. M., Béthermin, M., Carlstrom, J. E., Chapman, S. C., Crawford, T. M., de Breuck, C., Everett, W., Fassnacht, C. D., Furstenau, R. M., Gonzalez, A. H., Greve, T. R., Gullberg, B., Hezaveh, Y., Kamenetzky, J. R., Litke, K., Ma, J., Malkan, M., Marrone, D. P., Menten, K. M., Murphy, E. J., Nadolski, A., Rotermund, K. M., Spilker, J. S., Stark, A. A., Strandet, M. L., Vieira, J. D., Weiß, A., Welikala, N.   +30 more
core   +4 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

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, Jan-Torge Schindler, B. Venemans, F. Walter, Xue-bing Wu, M. Yue   +22 more
semanticscholar   +1 more source

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

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

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

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

A Modified Vilsmeier–Haack Strategy to Construct β-Pyridine-Fused 5,10,15,20-Tetraarylporphyrins

SynOpen, 2020
A modified Vilsmeier–Haack strategy has been developed to construct a novel series of π-extended nickel(II) or copper(II) complexes of 2-chloro-3-formyl- and 3-formylpyrido[2,3-b]porphyrins from 2-acetamido-meso-tetraarylporphyrins. After chromatographic
Pargat Singh, Mahendra Nath
doaj   +1 more source

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