Results 71 to 80 of about 292,957 (316)

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

The Origin of Low-redshift Event Rate Excess as Revealed by the Low-luminosity Gamma-Ray Bursts

The Astrophysical Journal, 2023
The relation between the event rate of long gamma-ray bursts and the star formation rate is still controversial, especially at the low-redshift end. Dong et al.
X. F. Dong, Z. B. Zhang, Q. M. Li, Y. F. Huang, K. Bian   +4 more
doaj   +1 more source

A blind test of photometric redshift prediction [PDF]

, 1998
Results of a blind test of photometric redshift predictions against spectroscopic galaxy redshifts obtained in the Hubble Deep Field with the Keck Telescope are presented.
Alberto Fernández-Soto, Alexander S. Szalay, Amos Yahil, Andrew J. Connolly, B. Mobasher, David W. Hogg, F. D. A. Hartwick, H. K. C. Yee, Huan Lin, Istvan Csabai, Judith G. Cohen, Kenneth M. Lanzetta, Marcin Sawicki, Mark Dickinson, Mark U. SubbaRao, Mobasher B., Paula Mazzei, Robert J. Brunner, Roger Blandford, Stephen D. J. Gwyn   +19 more
core   +3 more sources

Model-independent constraints on dark energy evolution from low-redshift observations [PDF]

Monthly notices of the Royal Astronomical Society, 2018
Knowing the late time evolution of the Universe and finding out the causes for this evolution are the important challenges of modern cosmology. In this work, we adopt a model-independent cosmographic approach and approximate the Hubble parameter ...
S. Capozziello, R. Ruchika, A. A. Sen
semanticscholar   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Correction to: Status of racial disparities between black and white women undergoing assisted reproductive technology in the US

Reproductive Biology and Endocrinology, 2020
An amendment to this paper has been published and can be accessed via the original article.
David B. Seifer, Burcin Simsek, Ethan Wantman, Alexander M. Kotlyar   +3 more
doaj   +1 more source

The Redshift of the BL Lac Object TXS 0506+056 [PDF]

, 2018
The bright BL Lac object TXS 0506+056 is the most likely counterpart of the IceCube neutrino event EHE 170922A. The lack of this redshift prevents a comprehensive understanding of the modeling of the source.
S. Paiano, R. Falomo, A. Treves, R. Scarpa   +3 more
semanticscholar   +1 more source

Stoma‐Shell Nanoarchitecture for Enhanced Plasma Confinement Catalysis in Synthesis of Ethanol from CO2

Advanced Functional Materials, EarlyView.
High‐energy electron impact in plasma catalysis often causes excessive dissociation of active intermediates, limiting C2+ product selectivity. To address this challenge, a bio‐inspired stoma‐shell nanoarchitecture is designed to decouple electron impact from catalytic reaction zones.
Nan Zou, Zhiliang Dong, Tsun‐Kong Sham, Xiaonian Li, Ying Zheng, Ting Qiu   +5 more
wiley   +1 more source

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 Radio-to-Submillimeter Flux Density Ratio of Galaxies as a Measure of Redshift [PDF]

, 2000
We re-examine the technique of determining the redshifts of galaxies from the ratio of the submillimeter-to-radio continuum flux densities based on a recently published catalog of 850~$\mu$m sources.
Bertoldi, Scott, Siebenmorgen
core   +3 more sources