Results 31 to 40 of about 3,823 (252)
Power spectrum estimation methods on intracluster medium surface brightness fluctuations [PDF]
EPJ Web of ConferencesAccurate estimation of galaxy cluster masses is a central problem in cosmology. Turbulence is believed to introduce significant deviations from the hydrostatic mass estimates.
Bishop M. +3 more
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Cluster detection from surface-brightness fluctuations in SDSS data [PDF]
Astronomy & Astrophysics, 2002 7 pages, submitted to Astronomy & ...
Bartelmann, M., White, S.
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Infrared Surface Brightness Fluctuations of Magellanic Star Clusters
The Astrophysical Journal, 2004 We present surface brightness fluctuations (SBFs) in the near--IR for 191 Magellanic star clusters available in the Second Incremental and All Sky Data releases of the Two Micron All Sky Survey (2MASS), and compare them with SBFs of Fornax Cluster galaxies and with predictions from stellar population models. Our goals are twofold.
Gonzalez, Rosa A. +2 more
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The Astrophysical Journal, 2002 We have measured KS-band (2.0-2.3 μm) surface brightness fluctuations (SBFs) of 19 early-type galaxies in the Fornax Cluster. Fornax is ideally suited both for calibrating SBFs as distance indicators and for using SBFs to probe the unresolved stellar content of early-type galaxies. Combining our results with published data for other nearby clusters, we
Liu, Michael C. +2 more
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On surface brightness fluctuations: probabilistic and statistical bases [PDF]
Astronomy & Astrophysics, 2008 Aims. This work aims to provide a theoretical formulation of surface brightness fluctuations (SBF) in the framework of probabilistic population synthesis models that have no deterministic relations between the different stellar components of a population but only relations on average, and to distinguish between the different distributions involved in ...
M. Cerviño, V. Luridiana, L. Jamet
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Surface brightness fluctuations, tracers of stellar mass-loss? [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractWe present optical and IR integrated colors and SBF magnitudes, computed from stellar population synthesis models that include emission from the dusty envelopes surrounding mass-loosing TP-AGB stars. We explore the effects of varying the mass-loss rate by one order of magnitude around the fiducial value, modifying accordingly both the stellar ...
Rosa A. González-Lópezlira +4 more
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Surface Brightness Fluctuations: a theoretical point of view
, 2002 We present new theoretical evaluations of optical and near-IR Surface Brightness Fluctuations (SBF) magnitudes for single-burst stellar populations in the age range t=5-15 Gyr and metallicity from $Z_{\sun}/200$ to $2Z_{\sun}$. Our theoretical predictions can be successfully used to derive reliable distance evaluations. They also appear to be a new and
Cantiello, M. +3 more
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The First SNAP Surface Brightness Fluctuation Distances [PDF]
, 2023 We have successfully acquired F110W (J-band) images of 68 massive elliptical galaxies inclusters and groups out to 80 Mpc by taking advantage of the efficient Hubble Space Telescope SNAP observing mode. We used the Surface Brightness Fluctuation (SBF) technique to measure distances to 44 of the galaxies so far with a typical uncertainty of ~5 ...
Cowles, Mikaela +4 more
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应用气象学报Based on FY-4A geostationary satellite multi-channel data, mesoscale convective systems (MCSs) during three downhill processes of convection strengthening (1 July 2021, 12 June 2022 and 4 August 2022) in Beijing are identified by temperature threshold ...
Yang Yiya +5 more
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Observations of surface-brightness fluctuations in Virgo
The Astronomical Journal, 1990 VRI photometric observations of surface-brightness fluctuation in 13 Virgo Cluster galaxies, M32, and NGC 3379, obtained using an 800 x 800 CCD array on the 4-m telescope at KPNO during March 1989, are reported. The data-reduction techniques are described in detail, and the results are presented in tables and graphs.
John L. Tonry +2 more
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