scholarly journals The Two-Dimensional Power Spectrum of the Las Campanas Redshift Survey: Detection of Excess Power on 100 [ITAL]h[/ITAL][TSUP]−1[/TSUP] Mpc Scales

1996 ◽  
Vol 456 (1) ◽  
Author(s):  
Stephen D. Landy ◽  
Stephen A. Shectman ◽  
Huan Lin ◽  
Robert P. Kirshner ◽  
Augustus A. Oemler ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Two Dimensional ◽  
Redshift Survey ◽  
Excess Power

Power spectrum of rare events in a two-dimensional BTW model

2018 ◽  
Vol 93 (10) ◽  
pp. 105203
Author(s):  
Z Moghadam ◽  
M N Najafi ◽  
A Saber ◽  
Z Ebadi
Keyword(s):  
Power Spectrum ◽  
Rare Events ◽  
Two Dimensional

scholarly journals The power spectrum of galaxies in the 2dF 100k redshift survey

2002 ◽  
Vol 335 (4) ◽  
pp. 887-908 ◽  
Author(s):  
M. Tegmark ◽  
A. J. S. Hamilton ◽  
Y. Xu
Keyword(s):  
Power Spectrum ◽  
Redshift Survey

Power spectrum, correlation function, and tests for luminosity bias in the CfA redshift survey

1994 ◽  
Vol 431 ◽  
pp. 569 ◽  
Author(s):  
Changbom Park ◽  
Michael S. Vogeley ◽  
Margaret J. Geller ◽  
John P. Huchra
Keyword(s):  
Correlation Function ◽  
Power Spectrum ◽  
Redshift Survey ◽  
Spectrum Correlation

scholarly journals Interferometric Techniques Applied to High Resolution Observation of the Solar Granulation

1979 ◽  
Vol 50 ◽  
pp. 30-1-30-6
Author(s):  
Claude Aime
Keyword(s):  
High Resolution ◽  
Power Spectrum ◽  
Statistical Properties ◽  
Two Dimensional ◽  
Solar Granulation ◽  
One Dimensional ◽  
Resolution Observation ◽  
Stellar Interferometry ◽  
High Resolution Observation

AbstractMichelson,one-dimensional, and two-dimensional apertures are used to obtain the statistical properties of the solar granulation. The calibration of the power spectrum is performed via Michelson stellar interferometry as well as by the use of changes in seeing conditions during speckle-interferometric measurements. The correction of 40 analyses, determined with Fried's parameter ro ranging between 2.5 cm and 11.5 cm, provides satisfactory convergence for frequencies up to 3 cycles per arc second

scholarly journals Reconstructing the Primordial Power Spectrum

2005 ◽  
Vol 216 ◽  
pp. 28-34
Author(s):  
S. L. Bridle ◽  
A. M. Lewis ◽  
J. Weller ◽  
G. Efstathiou
Keyword(s):  
Power Spectrum ◽  
Spectral Index ◽  
Large Scale ◽  
Cosmological Parameters ◽  
Wilkinson Microwave Anisotropy Probe ◽  
Microwave Background ◽  
Primordial Power Spectrum ◽  
Initial Spectrum ◽  
Redshift Survey ◽  
Cosmic Microwave Background Data

We reconstruct the shape of the primordial power spectrum from the latest cosmic microwave background data, including the new results from the Wilkinson Microwave Anisotropy Probe (WMAP), and large scale structure data from the two degree field galaxy redshift survey (2dFGRS). We discuss two parameterizations taking into account the uncertainties in four cosmological parameters. First we parameterize the initial spectrum by a tilt and a running spectral index, finding marginal evidence for a running spectral index only if the first three WMAP multipoles (ℓ = 2, 3, 4) are included in the analysis. Secondly, to investigate further the low CMB large scale power, we modify the conventional power-law spectrum by introducing a scale above which there is no power. We find a preferred position of the cut at kc ∼ 3 × 10--4 Mpc--1 although kc = 0 (no cut) is not ruled out.

scholarly journals Solar-Like Oscillations of Procyon A: Stellar Models and Time Series Simulations versus Observations

2000 ◽  
Vol 176 ◽  
pp. 461-462
Author(s):  
C. Barban ◽  
E. Michel ◽  
M. Martic ◽  
J. Schmitt ◽  
J. C. Lebrun ◽  
...  
Keyword(s):  
Time Series ◽  
Power Spectrum ◽  
Numerical Simulations ◽  
Observational Data ◽  
Theoretical Predictions ◽  
Stellar Models ◽  
Excess Power ◽  
New Evidence

AbstractThe aim of this paper (further developed in Barban et al. 1999) is to present new evidence of the possible stellar origin of the observed excess power in the power spectrum of Procyon A presented in Martic et al. (1999) by comparing these observational data with theoretical predictions and numerical simulations.

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