Results 61 to 70 of about 6,949,336 (206)

On (Some) Explanations in Physics [PDF]

, 2010
I offer one possible explanation of why inertial and gravitational mass are equal in Newtonian gravitation. I then argue that the explanation given is an example of a kind of explanation that is not captured by standard philosophical accounts of ...
Weatherall, James Owen, James Owen Weatherall   +1 more
core   +1 more source

The Effect of Microlensing on the Observed X-Ray Energy Spectra of Gravitationally Lensed Quasars [PDF]

Astrophysical Journal, 2018
The Chandra observations of several gravitationally lensed quasars show evidence for flux and spectral variability of the X-ray emission that is uncorrelated between images and is thought to result from the microlensing by stars in the lensing galaxy. We
H. Krawczynski, G. Chartas, F. Kislat
semanticscholar   +1 more source

Modelling photometric reverberation mapping data for the next generation of big data surveys. Quasar accretion discs sizes with the LSST

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT Photometric reverberation mapping can detect the radial extent of the accretion disc (AD) in Active Galactic Nuclei by measuring the time delays between light curves observed in different continuum bands. Quantifying the constraints on the efficiency and accuracy of the delay measurements is important for recovering the AD size ...
F Pozo Nuñez, C Bruckmann, S Deesamutara, B Czerny, S Panda, A P Lobban, G Pietrzyński, K L Polsterer   +7 more
openaire   +2 more sources

First results from high redshift quasar searches in VIKING [PDF]

, 2012
This thesis presents the discovery of the first luminous z & 6.5 quasars in the VISTA kilo-degree Infrared Galaxy Survey (VIKING). After some basic quality control, quasar selection is investigated via use of initial data supplementedwith ...
Findlay, Joseph
core  

Herschel-ATLAS*: far-infrared properties of radio-loud and radio-quiet quasars [PDF]

, 2014
We have constructed a sample of radio-loud and radio-quiet quasars from the Faint Images Radio Sky at Twenty-one centimetres and the Sloan Digital Sky Survey Data Release 7, over the Herschel-ATLAS Phase 1 area (9h, 12h and 14. h 5).
de Zotti, G, Dunne, Loretta, Valiante, Elisabetta, Stevens, JA, Ibar, E, Valiante, E, de Zotti, G., Maddox, S., Smith, DJB, Ivison, RJ, Jarvis, M. J., Valiante, E., Smith, Daniel, Jarvis, M.J., Hardcastle, M.J., Hardcastle, M. J., Smith, M. W. L., Ibar, E., Smith, D. J. B., Hardcastle, MJ, Eales, Stephen Anthony, Ivison, R. J., Kalfountzou, E, Eales, S., Smith, Matthew W., Stevens, J.A., Maddox, S, Maddox, Steve, Kalfountzou, E., Bourne, N., Jarvis, MJ, Dunne, L., Ivison, R.J., Stevens, J. A., Bourne, N, Eales, S, Dunne, L, Smith, MWL   +37 more
core   +1 more source

Plasmonic Enhancement of Fluorescence and Protein Dynamics in Living Mammalian Cells

Advanced Materials, EarlyView.
This study demonstrates plasmonic enhancement of the function of fluorescent voltage sensing proteins (genetically encoded voltage indicators, (GEVIs), QuasAr6) in live mammalian cells. Coupling to plasmonic nanoparticles does not just increase fluorescence, but influences the protein photocycle, creating a hybrid sensor with its response speed to ...
Marco Locarno, Qiangrui Dong, Marco Post, Xin Meng, Cristiano Glessi, Nynke Marije Hettema, Nidas Brandsma, Sebbe Blokhuizen, Alejandro Castañeda Garcia, Srividya Ganapathy, Thieme Schmidt, Lars van Roemburg, Bing Xu, Chun‐Ting Cho, Liedewij Laan, Miao‐Ping Chien, Daan Brinks   +16 more
wiley   +1 more source

QUEST: Quasar unsupervised encoder and synthesis tool. A machine-learning framework for generating quasar spectra

Astronomy & Astrophysics
Quasars at the redshift frontier (z > 7.0) are fundamental probes of black hole growth and evolution, but are notoriously difficult to identify. At these redshifts, machine-learning-based selection methods have proven to be efficient, but require appropriate training sets to reach their full potential. We present the variational auto-encoder , which
Guarneri, F., Schindler, J. T., Meyer, R. A., Yang, D., Hennawi, J. F., Lucie-Smith, L., Bosman, S. E. I., Davies, F. B.   +7 more
openaire   +2 more sources

psfgan: a generative adversarial network system for separating quasar point sources and host galaxy light [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
ISSN:0035 ...
Dominic Stark, Barthelemy Launet, Kevin Schawinski, Ce Zhang, Michael Koss, M Dennis Turp, Lia F Sartori, Hantian Zhang, Yiru Chen, Anna K Weigel   +9 more
openaire   +6 more sources

UCHL3 Regulates Subgenomic Flaviviral RNA Condensates to Promote Virus Propagation

Advanced Science, EarlyView.
ABSTRACT Flavivirus subgenomic RNAs (sfRNAs) antagonise antiviral defences, yet how sfRNAs are organized and maintained in cells remains poorly understood. Here we identify ubiquitin C‐terminal hydrolase L3 (UCHL3) as a post‐translational regulator of flavivirus sfRNA stability and function.
Oscar Trejo‐Cerro, Anna Beekmayer‐Dhillon, Qi Wen Teo, Lewis Siu, Ming Yuan Li, Kate J. Heesom, Adán Pinto‐Fernández, Sumana Sanyal   +7 more
wiley   +1 more source

What sparks the radio-loud phase of nearby quasars? [PDF]

, 2016
To better constrain the hypotheses proposed to explain why only a few quasars are radio loud (RL), we compare the characteristics of 1958 nearby $(z\le 0.3)$ SDSS quasars, covered by the FIRST and NVSS radio surveys.
R. Coziol, H. Andernach, Juan Pablo Torres-Papaqui Ren'e Alberto Ortega-Minakata, Froylan Moreno del Rio   +3 more
semanticscholar   +1 more source