Results 41 to 50 of about 186,945 (281)

Reconciliation of the Surface Brightness Fluctuation and Type Ia Supernova Distance Scales [PDF]

open access: yes, 2001
We present Hubble Space Telescope measurements of surface brightness fluctuation (SBF) distances to early-type galaxies that have hosted Type Ia supernovae (SNe Ia).
E. Ajhar   +4 more
semanticscholar   +1 more source

Infrared Surface Brightness Fluctuations of Magellanic Star Clusters

open access: yesThe 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
openaire   +2 more sources

Studying the ICM in clusters of galaxies via surface brightness fluctuations of the cosmic X-ray background

open access: yes, 2017
We study the surface brightness fluctuations of the cosmic X-ray background (CXB) using Chandra data of XBOOTES. After masking out resolved sources we compute the power spectrum of fluctuations of the unresolved CXB for angular scales from ~2 arcsec to ...
Gilfanov, Marat   +3 more
core   +5 more sources

Surface Brightness Fluctuations of Fornax Cluster Galaxies: Calibration of Infrared Surface Brightness Fluctuations and Evidence for Recent Star Formation

open access: yesThe 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
openaire   +2 more sources

On surface brightness fluctuations: probabilistic and statistical bases [PDF]

open access: yesAstronomy & 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
openaire   +1 more source

EFFECTS OF α-ELEMENT ENHANCEMENT AND THE THERMALLY PULSING-ASYMPTOTIC GIANT BRANCH ON SURFACE BRIGHTNESS FLUCTUATION MAGNITUDES AND BROADBAND COLORS [PDF]

open access: yes, 2009
We investigate the effects of α-element enhancement and the thermally pulsing-asymptotic giant branch (TP-AGB) stars on the surface brightness fluctuation (SBF) magnitudes and broadband colors of simple stellar populations and compare to the empirical ...
Hyun-Chul Lee, G. Worthey, J. Blakeslee
semanticscholar   +1 more source

The Impact of Atmospheric Fluctuations on Degree-scale Imaging of the Cosmic Microwave Background [PDF]

open access: yes, 2000
Fluctuations in the brightness of the Earth's atmosphere originating from water vapor are an important source of noise for ground-based instruments attempting to measure anisotropy in the Cosmic Microwave Background.
Armstrong J. W.   +10 more
core   +4 more sources

New Optical and Near-Infrared Surface Brightness Fluctuation Models: A Primary Distance Indicator Ranging from Globular Clusters to Distant Galaxies? [PDF]

open access: yes, 2003
We present new theoretical models for surface brightness fluctuations (SBFs) both for optical and near-infrared bands in standard ground-based and Hubble Space Telescope filter systems. Simple stellar population simulations are adopted.
M. Cantiello   +12 more
semanticscholar   +1 more source

Surface brightness fluctuations, tracers of stellar mass-loss? [PDF]

open access: yesProceedings 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
openaire   +1 more source

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