Results 21 to 30 of about 29,250 (249)
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 ...
Noelia Jiménez +4 more
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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 +4 more
openaire +2 more sources
Toward a brightness upgrade to the SwissFEL: A high gradient traveling-wave rf photogun
Physical Review Accelerators and Beams, 2023 The first generation of S-band injectors for free-electron lasers has illustrated high reliability and performance by driving the latest generation of high brightness machines. However, the ultimate electron beam brightness of these devices is limited by
Thomas Geoffrey Lucas +13 more
doaj +1 more source
Magnitude-range brightness variations of overactive K giants [PDF]
Astronomy & Astrophysics, 2014 13 pages, 8 figures, accepted in A& ...
Oláh, Katalin Ilona +6 more
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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
Are numbers, size and brightness equally efficient in orienting visual attention? Evidence from an eye-tracking study. [PDF]
PLoS ONE, 2014 A number of studies have shown strong relations between numbers and oriented spatial codes. For example, perceiving numbers causes spatial shifts of attention depending upon numbers' magnitude, in a way suggestive of a spatially oriented, mental ...
Hermann Bulf +2 more
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 +3 more
openaire +3 more sources
The Hubble diagram for red magnitudes of bright cluster galaxies [PDF]
International Astronomical Union Colloquium, 1977 Nous présentons le diagramme de Hubble des amas brillants de galaxies.
J. Kristian +2 more
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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
Nature Communications, 2022 Manipulating topological arrangement is a powerful tool for tuning the energy migration in molecular systems and inorganic materials. Here, authors synthesize NaErF4 and NaYbF4 upconversion nanoparticles with different architectures and demonstrate ...
Yanxin Zhang +7 more
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