A5103231332- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Wildlife Ecology and Conservation
- Species Distribution and Climate Change
- Neutrino Physics Research
- Scientific Research and Discoveries
- Particle physics theoretical and experimental studies
- Morphological variations and asymmetry
- Primate Behavior and Ecology
- Point processes and geometric inequalities
- Relativity and Gravitational Theory
- Astrophysics and Cosmic Phenomena
- Ovarian function and disorders
- Endometriosis Research and Treatment
- Reproductive Biology and Fertility
- Astronomy and Astrophysical Research
- Uterine Myomas and Treatments
- Global Energy Security and Policy
- Advanced Differential Geometry Research
- Cell Image Analysis Techniques
- Gynecological conditions and treatments
- Solar and Space Plasma Dynamics
- Balance, Gait, and Falls Prevention
University of the Philippines Manila
2024
Pacific Northwest National Laboratory
2024
Universidad de Cantabria
2014-2023
IVI Madrid Clinic
2021
Universitat de València
2013
Instituto de Física de Cantabria
2004-2010
Consejo Superior de Investigaciones Científicas
2007-2008
University of Cambridge
2007
The ESA's Planck satellite, dedicated to studying the early Universe and its subsequent evolution, was launched 14 May 2009 has been scanning microwave submillimetre sky continuously since 12 August 2009. This paper gives an overview of mission performance, processing, analysis, characteristics data, scientific results, science data products papers in release. include maps CMB diffuse extragalactic foregrounds, a catalogue compact Galactic sources, list sources detected through SZ effect....
The European Space Agency's Planck satellite, dedicated to studying the early Universe and its subsequent evolution, was launched 14~May 2009 scanned microwave submillimetre sky continuously between 12~August 23~October 2013. In February~2015, ESA Collaboration released second set of cosmology products based on data from entire mission, including both temperature polarization, along with a scientific technical papers web-based explanatory supplement. This paper gives an overview main...
The two fundamental assumptions of the standard cosmological model - that initial fluctuations are statistically isotropic and Gaussian rigorously tested using maps cosmic microwave background (CMB) anisotropy from Planck satellite. Deviations isotropy have been found demonstrated to be robust against component separation algorithm, mask choice frequency dependence. Many these anomalies were previously observed in WMAP data, now confirmed at similar levels significance (about 3 sigma)....
We test the statistical isotropy and Gaussianity of cosmic microwave background (CMB) anisotropies using observations made by Planck satellite. Our results are based mainly on full mission for temperature, but also include some polarization measurements. In particular, we consider CMB anisotropy maps derived from multi-frequency data several component-separation methods. For temperature anisotropies, find excellent agreement between these sky over both a very large fraction broad range...
Planck has produced detailed all-sky observations over nine frequency bands between 30 and 857 GHz. These allow robust reconstruction of the primordial cosmic microwave background (CMB) temperature fluctuations nearly full sky, as well new constraints on Galactic foregrounds, including thermal dust line emission from molecular carbon monoxide (CO). This paper describes component separation framework adopted by for many cosmological analyses, CMB power spectrum determination likelihood...
An extremely cold and big spot in the Wilkinson Microwave Anisotropy Probe (WMAP) 1-yr data is analysed. Our work a continuation of previous paper by Vielva et al. that reported detection non-Gaussianity, with method based on spherical Mexican hat wavelet (SMHW) technique. We study spots at different thresholds SMHW coefficient maps, considering six estimators, namely number maxima, minima, numbers hot spots, pixels those spots. At scales around 4° (10° sky), deviate from Gaussianity. The...
The non-Gaussian cold spot detected in wavelet space the WMAP 1 yr data is again co-added 3 at same position (b = -57°, l 209°) and size sky (≈10°). present analysis based on several statistical methods: kurtosis, maximum absolute temperature, number of pixels below a given threshold, volume, higher criticism. All these methods detect deviations from Gaussianity set slightly confidence level than data. These small differences are mainly due to new foreground reduction technique not noise...
The scientific performance of the Planck Low Frequency Instrument (LFI) after one year in-orbit operation is presented. We describe main optical parameters and discuss photometric calibration, white noise sensitivity, properties. A preliminary evaluation impact systematic effects For each parameters, we outline methods used to obtain them from flight data provide a comparison with pre-launch ground assessments, which are essentially confirmed in flight.
We present the current accounting of systematic effect uncertainties for Low Frequency Instrument (LFI) that are relevant to 2015 release Planck cosmological results, showing robustness and consistency our data set, especially polarization analysis. use two complementary approaches: (i) simulations based on measured physical models known effects; (ii) analysis difference maps containing same sky signal ("null-maps"). The LFI temperature limited by instrumental noise. At large angular scales...
The non--Gaussian cold spot in the 1-year WMAP data, described Vielva et al. and Cruz al., is analysed detail present paper. First of all, we perform a more rigorous calculation significance non-zero kurtosis detected maps by wavelet space, mainly generated Spot. We confirm robustness that detection, since probability obtaining this deviation chance 0.69%. Afterwards, morphology Spot studied applying Spherical Mexican Hat Wavelets with different ellipticities. shape found to be almost...
The Cosmic Microwave Background provides our most ancient image of the Universe and best tool for studying its early evolution. Theories high energy physics predict formation various types topological defects in very universe, including cosmic texture which would generate hot cold spots Background. We show through a Bayesian statistical analysis that prominent, 5 degree radius spot observed all-sky images, is otherwise hard to explain, compatible with having being caused by texture. From...
We describe the data processing pipeline of Planck Low Frequency Instrument (LFI) centre (DPC) to create and characterize full-sky maps based on first 15.5 months operations at 30, 44 70 GHz. In particular, we discuss various steps involved in reducing data, starting from telemetry packets through production cleaned, calibrated timelines frequency maps. Data are continuously using modulation induced mean temperature cosmic microwave background radiation by proper motion spacecraft. Sky...
The non-Gaussian cold spot found in the WMAP data has created controversy about its origin. Here we calculate Bayesian posterior probability ratios for three different models that could explain spot. A recent work claimed Spot be caused by a cosmic texture, while other papers suggest it due to gravitational effect produced an anomalously large void. Also Sunyaev-Zeldovich cluster is taken into account as possible We perform template fitting on 20 degrees radius patch centered at Galactic...
We describe the processing of data from Low Frequency Instrument (LFI) used in production Planck Early Release Compact Source Catalogue (ERCSC). In particular, we discuss steps involved reducing telemetry packets to cleaned, calibrated, time-ordered (TOD) and frequency maps. Data are continuously calibrated using modulation temperature cosmic microwave background radiation induced by motion spacecraft. Noise properties estimated TOD which sky signal has been removed a generalized least...
We present the current estimate of instrumental and systematic effect uncertainties for Planck-Low Frequency Instrument relevant to first release Planck cosmological results. give an overview main effects tools methods applied assess residuals in maps power spectra. also overall budget known uncertainties, which are dominated sidelobe straylight pick-up imperfect calibration. However, even these two at least orders magnitude weaker than cosmic microwave background (CMB) fluctuations as...
A previous work estimated the cosmic microwave background (CMB) variance from 3-yr Wilkinson Microwave Anisotropy Probe (WMAP) data, finding a lower value than expected Gaussian simulations using WMAP best-fitting cosmological model. We repeat analysis on 5-yr data new estimator with bias and variance. Our results confirm this anomaly at higher significance, namely p-value of 0.31 per cent. perform different exclusion masks, showing that particular region sky near Galactic plane shows 95.58...
We have returned to our previous Bianchi VIIh analysis in light of the Cruz et al. suggestion that cold spot observed near Southern Galactic Pole may be a remnant temperature perturbation cosmic texture. Bridges used two favoured left-handed templates with restricted prior probabilities so template was centred close spot. Using Wilkinson Microwave Anisotropy Probe (WMAP) data 'corrected' for texture fit we now re-examined both models assess any changes these conclusions. find are left almost...
One of the most interesting explanations for non-Gaussian Cold Spot (CS) detected in WMAP data by Vielva et al. 2004, is that it arises from interaction CMB radiation with a cosmic texture (Cruz 2007b). In this case, lack polarization expected region spot, as compared to typical values associated large fluctuations GIRF. addition, other physical processes related non-linear evolution gravitational field could lead similar scenario. However, some these alternative scenarios (e.g., void scale...
The decrease of volume estimates in different structures the medial temporal lobe related to memory correlate with decline cognitive functions neurodegenerative diseases. This study presents data on association between MRI quantitative parameters and their estimate microscopic examination. Twelve control cases had ex-vivo MRI, thereafter, both hemispheres was sectioned from pole as far level splenium corpus callosum. Nissl stain used establish anatomical boundaries lobe. included...