Results 31 to 40 of about 2,016,170 (332)

Color analysis based on the color indices of lightning channels obtained from a digital photograph

Results in Physics, 2019
In this study, we present an analysis using the color indices B-G,B-R, and G-R of lightning channels obtained from a digital photograph. We used color-magnitude diagrams (CMDs) modified from the traditional CMDs employed in astronomical photometry, (B-G)
Nobuaki Shimoji, Takahiro Nakano
doaj   +1 more source

The central region of the Fornax cluster -- I. A catalog and photometric properties of galaxies in selected CCD fields [PDF]

, 1998
We present a photometric catalog (based on V and I photometry) of galaxies in the central regions of the Fornax galaxy cluster. Our 11 CCD fields cover 0.17 degrees in total.
Hilker, M., Infante, L., Kissler-Patig, M., Quintana, H., Richtler, T.   +4 more
core   +3 more sources

Magnitude of Discomfort caused by High Brightness [PDF]

Nature, 1958
HITHERTO the greatest care has been taken here in the studies of building efficiency to avoid methods of subjective judgment which depend on assessment of sensation magnitude in terms of numbers. For certain reasons, however, a numerical assessment of the magnitude of the sensation of discomfort due to glare was required.
openaire   +1 more source

Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources [PDF]

Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment, 2018
Recent investigations of RF copper structures operated at cryogenic temperatures performed by a SLAC-UCLA collaboration have shown a dramatic increase in the maximum surface electric field, to 500 MV/m.
J. Rosenzweig, A. Cahill, B. Carlsten, G. Castorina, M. Croia, C. Emma, A. Fukusawa, B. Spataro, D. Alesini, V. Dolgashev, M. Ferrario, G. Lawler, R. Li, C. Limborg, J. Maxson, P. Musumeci, R. Pompili, Sami G. Tantawi, O. Williams   +18 more
semanticscholar   +1 more source

Gaia Data Release 2: Variable stars in the colour-absolute magnitude diagram [PDF]

, 2018
The ESA Gaia mission provides a unique time-domain survey for more than 1.6 billion sources with G ~ 21 mag. We showcase stellar variability across the Galactic colour-absolute magnitude diagram (CaMD), focusing on pulsating, eruptive, and cataclysmic ...
L. Eyer, L. Rimoldini, M. Audard, R. I. Anderson, K. Nienartowicz, F. Glass, O. Marchal, M. Grenon, N. Mowlavi, B. Holl, G. Clementini, C. Aerts, T. Mazeh, D. Evans, L. Szabados, A. Brown, A. Vallenari, T. Prusti, J. Bruijne, C. Babusiaux, C. Bailer-Jones, M. Biermann, F. Jansen, C. Jordi, S. Klioner, U. Lammers, L. Lindegren, X. Luri, F. Mignard, C. Panem, D. Pourbaix, S. Randich, P. Sartoretti, H. Siddiqui, C. Soubiran, F. V. Leeuwen, N. Walton, Frédéric Arenou, U. Bastian, M. Cropper, R. Drimmel, D. Katz, M. Lattanzi, J. Bakker, C. Cacciari, J. Castañeda, L. Chaoul, N. Cheek, F. Angeli, C. Fabricius, R. Guerra, E. Masana, R. Messineo, P. Panuzzo, J. Portell, M. Riello, G. Seabroke, P. Tanga, F. Thévenin, G. Gracia-Abril, G. Comoretto, M. Garcia-Reinaldos, D. Teyssier, M. Altmann, R. Andrae, I. Bellas-Velidis, K. Benson, J. Berthier, R. Blomme, P. Burgess, G. Busso, B. Carry, A. Cellino, M. Clotet, O. Creevey, M. Davidson, J. Ridder, L. Delchambre, A. Dell’Oro, C. Ducourant, J. Fernández-Hernández, M. Fouesneau, Y. Frémat, L. Galluccio, M. García-Torres, J. González-Núñez, J. J. González-Vidal, E. Gosset, L. Guy, J. Halbwachs, N. Hambly, D. Harrison, J. Hernández, D. Hestroffer, S. Hodgkin, A. Hutton, G. Jasniewicz, A. Jean-Antoine-Piccolo, S. Jordan, A. Korn, A. Krone-Martins, A. Lanzafame, T. Lebzelter, W. Löffler, M. Manteiga, P. Marrese, J. Martín-Fleitas, A. Moitinho, A. Mora, K. Muinonen, J. Osinde, E. Pancino, T. Pauwels, J. Petit, A. Recio-Blanco, P. J. Richards, A. Robin, L. Sarro, C. Siopis, M. Smith, A. Sozzetti, M. Süveges, J. Torra, W. V. Reeven, U. Abbas, A. Aramburu, S. Accart, G. Altavilla, M. A. Álvarez, R. Álvarez, J. Alves, A. Andrei, E. A. Varela, E. Antiche, T. Antoja   +134 more
semanticscholar   +1 more source

Deep learning for galaxy surface brightness profile fitting [PDF]

Monthly notices of the Royal Astronomical Society, 2017
Numerous ongoing and future large area surveys (e.g. DES, EUCLID, LSST, WFIRST), will increase by several orders of magnitude the volume of data that can be exploited for galaxy morphology studies. The full potential of these surveys can only be unlocked
D. Tuccillo, M. Huertas-Company, Etienne Decencière, S. Velasco-Forero, H. D. S'anchez, P. Dimauro   +5 more
semanticscholar   +1 more source

The bright end of the colour-magnitude relation of cluster galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2011
We investigate the physical processes involved in the development of the red sequence (RS) of cluster galaxies by using a combination of cosmological N-body simulations of clusters of galaxies and a semi-analytic model of galaxy formation. Results show good agreement between the general trend of the simulated RS and the observed colour-magnitude ...
Jiménez, Noelia, Cora, Sofía Alejandra, Bassino, Lilia Patricia, Tecce, Tomás E., Smith Castelli, Analía Viviana   +4 more
openaire   +4 more sources

Homogeneous vs Biased IGM: Impact on Reionization

Frontiers in Astronomy and Space Sciences, 2021
This paper considers the impact of large scale biasing of the IGM on reionization. The two simplest but extreme scenarios for IGM biasing are: an unbiased IGM which has a constant density and an IGM with density equal to the collapsed matter density.
Dinesh Raut
doaj   +1 more source

The Bright End of the Colour-Magnitude Relation

, 2009
Fil: Smith Castelli, Analia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas.
Jiménez, Noelia, Cora, Sofia Alejandra, Bassino, Lilia Patricia, Smith Castelli, Analia Viviana   +3 more
openaire   +3 more sources

A Comparison of Partition Scaling and Magnitude Estimation for Brightness Scaling [PDF]

LEUKOS, 2020
Several psychophysical procedures exist to capture the relationship between the magnitude of an optical stimulus (e.g. luminance) and the corresponding perceived brightness.
van de Perre, Laurens, Smet, Kevin A.G., Dujardin, Marc, Hanselaer, Peter, Ryckaert, Wouter   +4 more
openaire   +2 more sources