A5049321368- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- Experimental and Theoretical Physics Studies
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Robotic Mechanisms and Dynamics
- Sports Dynamics and Biomechanics
- Physical Education and Sports Studies
- Remote Sensing in Agriculture
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Science and Education Research
- Noise Effects and Management
- Solar and Space Plasma Dynamics
- Tribology and Lubrication Engineering
- Underwater Acoustics Research
- Dynamics and Control of Mechanical Systems
- Plant Water Relations and Carbon Dynamics
- Advanced Numerical Analysis Techniques
Universidade Federal Fluminense
2011-2025
Laboratório Interinstitucional de e-Astronomia
2011-2013
National Observatory
2010-2012
Valongo Observatory
2010-2012
Building on the legacy of Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program four spectroscopic surveys three scientific themes: dark energy cosmological parameters, history structure Milky Way, population giant planets around other stars. In keeping with SDSS tradition, will provide regular public releases all its data, beginning Data Release 8 (DR8), which was made in 2011 January includes SDSS-I SDSS-II images spectra reprocessed latest pipelines calibrations produced for...
We calculate the real- and redshift-space clustering of massive galaxies at z ∼ 0.5 using first semester data by Baryon Oscillation Spectroscopic Survey (BOSS). study correlation functions a sample 44,000 in redshift range 0.4 < 0.7. present halo-occupation distribution modeling results discuss implications for manner which occupy dark matter halos. The majority our are central living halos mass 1013 h−1 M☉, but 10% satellites 10 times more massive. These broadly agreement with earlier...
We investigate the effects of potential sources systematic error on angular and photometric redshift, zphot, distributions a sample redshift 0.4 < z 0.7 massive galaxies whose selection matches that Baryon Oscillation Spectroscopic Survey (BOSS) constant-mass sample. Utilizing over 112 778 BOSS spectra as training sample, we produce catalogue for in Sloan Digital Sky eight data release imaging area that, after masking, covers nearly one quarter sky (9913 deg2). fluctuations number density...
The Sloan Digital Sky Survey (SDSS) surveyed 14,555 deg2, and delivered over a trillion pixels of imaging data. We present study galaxy clustering using 900,000 luminous galaxies with photometric redshifts, spanning between z = 0.45 0.65, constructed from the SDSS methods described in Ross et al. This data set spans 11,000 deg2 probes volume 3 h−3 Gpc3, making it largest ever used for measurements. describe detail construction survey window function various systematics affecting our...
We measure the acoustic scale from angular power spectra of Sloan Digital Sky Survey III (SDSS-III) Data Release 8 imaging catalog that includes 872, 921 galaxies over ∼10,000 deg2 between 0.45 < z 0.65. The extensive spectroscopic training set Baryon Oscillation Spectroscopic luminous allows precise estimates true redshift distributions in our catalog. Utilizing distribution information, we build templates and fit to data, which are measured companion paper, derive location oscillations...
We propose a new method for cosmological parameters extraction using the baryon acoustic oscillation scale as standard ruler in deep galaxy surveys with photometric determination of redshifts. The consists simple empirical parametric fit to angular 2-point correlation function w(theta). It is parametrized power law describe continuum plus Gaussian BAO bump. location used basis measurement sound horizon scale. This method, although simple, actually provides robust estimation, since inclusion...
This study investigates the motion of a falling smartphone under influence air drag using acceleration data collected by its built-in accelerometer. The proper profiles demonstrate suitability turbulent model in capturing dynamics during both upward and downward phases. approach provides an effective accessible method for exploring fluid concepts educational context.
We analyse the large-scale angular correlation function (ACF) of CMASS luminous galaxies (LGs), a photometric-redshift catalogue based on Data Release 8 (DR8) Sloan Digital Sky Survey-III. This contains over 600 000 LGs in range 0.45 ≤ z 0.65, which was split into four redshift shells constant width. First, we estimate constraints redshift-space distortion (RSD) parameters bσ8 and fσ8, where b is galaxy bias, f growth rate σ8 normalization perturbations, finding that they vary appreciably...
We examine the impact of using photometric redshifts for studying evolution both global galaxy luminosity function (LF) and that different types. To this end we compare LFs obtained from CFHT Legacy Survey (CFHTLS) D1 field with those spectroscopic survey VIMOS VLT Deep (VVDS) comprising ~4800 galaxies. find z<2, in interval magnitudes considered by survey, show a remarkable agreement. This good agreement led us to use all four fields CFHTLS ~386000 galaxies compute LF combined estimate...
We study forecasts for the accuracy of determination cosmological parameters from future large-scale photometric surveys obtained using full shape 2-point galaxy angular correlation function. The effects linear redshift-space distortion, redshift Gaussian errors, bias and nonlinearities in power spectrum are included on our analysis. Fisher information matrix is constructed with covariance matrix, including between nearby shells arising error. show that under some reasonable assumptions, a...
In astrophysical and cosmological analyses, the increasing quality volume of astronomical data demand efficient precise computational tools. This work introduces a novel adaptive algorithm for automatic knots (AutoKnots) allocation in spline interpolation, designed to meet user-defined precision requirements. Unlike traditional methods that rely on manually configured knot distributions with numerous parameters, proposed technique automatically determines optimal number placement based...
Neste simples estudo é mostrado um método alternativo para o problema clássico de se encontrar a velocidade mínima necessária completar loop vertical raio R. Diferentemente da abordagem usual livros introdutórios física básica, que utilizam do conceito força (normal e peso), neste são utilizados apenas conceitos cinemática geometria valor conhecido v min = g
Neste trabalho será analisada uma corrida de 100 metros rasos utilizando um modelo que descreve o atleta como bola quicante adicionado do efeito arrasto ar turbulento.