722 research outputs found
Granitos postcinemáticos de tendencia alcalina en Ossa Morena: el stock de la Cardenchosa (prov. de Córdoba)
El stock de La Cardenchosa forma part d'un grup de granits post-cinemàtics de tendència alcalina d'edat posttournaisiana i que afloren en la zona d'Ossa Morena. Aquests granits presenten com trets característics l'allargament N-S dels seus afloraments, el seu emplaçament superficial, la presència de fàcies leucocràtiques i l'íntima connexió dels jaciments de fluorita i/o barita. La composició química i menirelògica del stock de La Cardenchosa és comparada amb altres de la mateixa regió
Pegmatitas en materiales metamórficos del norte de la provincia de Córdoba. Mineralogía y posibilidades económicas
[Resumen] En relación con rocas metamórficas de edad Precámbrica y metamorfismo de grado medio-alto se han estudiado más de 60 masas de pegmatitas cuarzo-feldespáticas compuestas por cuarzo, feldespato potásico, albita, moscovita, turma1 ina, granate, biotita, menas metálicas, minerales de uranio y otros. Las masas pegmatíticas son de formas irregulares o 1entejonares subconcordantes con la esquistosidad regional más manifiesta. Sus dimensiones oscilan entre unos decímetros y decenas de metros, y su continuidad lateral su pera en algunos casos los trescientos metros. Considerando sólo las masas de potencia métrica, por sus reservas, cal idad química de sus principales especies minerales, tamaño de grano, texturas, etc. es planteable la obtención industrial de cuarzo, feldespato potásico, feldespato sódico y moscovita[Abstract] More than 60 outcrops of quartz-fe1despatic pagmatites have been studied re1ated with Precambrian metamorphic rocks of medium-high grade. The pagmatites are composed of quartz, potash fe1dspar, a1bite, muscovite, turma1 ine, garnet, biotite, ores, uranium minerals and others. The pegmatite outcrops hare irregular o lenticular forms, subparallell to the main regional schistosity. They vary in size between a few decimeters to some tens of meters, whi1e su lateral continuity exceed in sorne cases 300 meterse By taking into account on1y the outcrop of metric size, their stocks, chemica1 qual ity of the main mineral species, grain size, texture, etc., it can be planned the industrial recovery of quartz, potash feldspar, sodic fe1dspar and muscovit
Non-Normality as a Predictor of Participation in Bullying: Valuation in Victims and Aggressors
Bullying is related to several variables, including diversity and variables that place the victim outside of normality. However, it is not easy to find a single meaning of normality. The present study has two main objectives: to find out whether victims are evaluated as non-normal and to find out whether aggressors are evaluated as non-normal. A cross-sectional, correlational, and quantitative study was designed, focusing on a representative sample of secondary school students from the Community of Madrid. The sample consisted of 2076 participants and was constructed using a stratified, proportional, and random sampling technique. To gather this information, a questionnaire was constructed. It includes a first section where sociodemographic and normality information is collected, and a second section made up of the Defensor del pueblo-UNICEF Bullying Questionnaire. The reliability and consistency of the questionnaire are acceptable (Cronbach’s alpha 0.91). For the comparison of means between groups, a Student’s t-test was applied, and the correlation between variables was calculated by applying the bivariate correlation test. Results show that victims are evaluated as non-normal while aggressors are perceived as normal. This implies that the risk of being involved in bullying situations as a victim can be predicted. © 2022 by the authors. Licensee MDPI, Basel, Switzerland
On the Environmental Dependence of Cluster Galaxy Assembly Timescale
We present estimates of CN and Mg overabundances with respect to Fe for
early-type galaxies in 8 clusters over a range of richness and morphology.
Spectra were taken from the Sloan Digital Sky Survey (SDSS) DR1, and from WHT
and CAHA observations. Abundances were derived from absorption lines and single
burst population models, by comparing galaxy spectra with appropriately
broadened synthetic model spectra. We detect correlations between [Mg/CN] and
[CN/Fe] and cluster X-ray luminosity. No correlation is observed for [Mg/Fe].
We also see a clear trend with the richness and morphology of the clusters.
This is interpreted given varying formation timescales for CN, Mg and Fe, and a
varying star formation history in early-type galaxies as a function of their
environment: intermediate-mass early-type galaxies in more massive clusters are
assembled on shorter timescales than in less massive clusters, with an upper
limit of ~1 Gyr.Comment: Accepted for publication in ApJ Letter
Materiales silico-carbonosos en el Precámbrico de Sierra Morena
[Resumen] Se aborda, por primera vez, un estudio comparativo de las cuarcitas negras del Precámbrico de Sierra Morena, evidenciando su carácter de rocas sílico-carbonosas, asociadas a sucesiones con importantes aportes volcánicos y producidas por precipitaci6n química-bioquímica de sílice en medios marinos someros y restringidos. Se discute su distribuci6n, valor en la correlación es tratigráfica, evoluci6n textural con el aumento del metamorfismo y la deformación y algunos de los caracteres generales de su quimismo y mineralogíaAbstract] A comparative study of the black quarzites of the Precambrian of Sierra ~orena is atte~pted here for the 'first time, which reveals their character of silicacarbonaceous rocks related to succesion with important volcanic contributions and produced by chemical-biochemical precipitacion of silica in restricted and shallow marine environments. It is discussed their distribution value in .stratigraphical correlation, textural evolution with increasing rnetamorfism ando deformation, and sorne of the general character of its chemistry and mineralog
Zonación metamórfica en el área Monesterio-Fuente de Cantos: criterios texturales y mineralógicos
[Resumen] En el sector central del denominado "anticlinorio 0livenza-Monesterio", en los materiales del Proterozoico superior afectados por un metamorfismo progresivo que alcanza condiciones anatécticas, se ha establecido una zonaci6n metamórfica para los grados bajo y medio, basada en el estado de evolución textural de diferentes 1itologias y caracteres ópticos de distintos minerales, en especial la biotita, en las rocas metape1iticas y metagrauváquicas.Abstract] In the central part of the so-called "anticlinorium 0livenza-Monesterio", in Upper Proterozoic materials affected by a progressive metamorphism which reach to anatectic condicions, a rnetamorphic zonation has been stab1ished for the 10w and middle metamorphic degrees based on the state of textural evolution of several lithologies and in the optical features of different minera1s, mainly the biotite, in metapelithic and metagrauwakic rock
The PAU survey: Ly α intensity mapping forecast
In this work, we explore the application of intensity mapping to detect
extended Ly emission from the IGM via cross-correlation of PAUS images
with Ly forest data from eBOSS and DESI. Seven narrow-band (FWHM=13nm)
PAUS filters have been considered, ranging from 455 to 515 nm in steps of 10
nm, which allows the observation of Ly emission in a range .
The cross-correlation is simulated first in an area of 100 deg (PAUS
projected coverage), and second in two hypothetical scenarios: a deeper PAUS
(complete up to instead of , observation time
x6), and an extended PAUS coverage of 225 deg (observation time x2.25). A
hydrodynamic simulation of size 400 Mpc/h is used to simulate both extended
Ly emission and absorption, while the foregrounds in PAUS images have
been simulated using a lightcone mock catalogue. Using an optimistic estimation
of uncorrelated PAUS noise, the total probability of a non-spurious detection
is estimated to be 1.8\% and 4.5\% for PAUS-eBOSS and PAUS-DESI , from a run of
1000 simulated cross-correlations with different realisations of instrumental
noise and quasar positions. The hypothetical PAUS scenarios increase this
probability to 15.3\% (deeper PAUS) and 9.0\% (extended PAUS). With realistic
correlated noise directly measured from PAUS images, these probabilities become
negligible. Despite these negative results, some evidences suggest that this
methodology may be more suitable to broad-band surveys.Comment: 18 pages, 14 figures, 6 tables. Accepted in MNRA
Dark energy survey year 1 results: The lensing imprint of cosmic voids on the cosmic microwave background
Cosmic voids gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint on degree scales. We use the simulated CMB lensing convergence map from the Marenostrum Institut de Ciencias de l’Espai (MICE) N-body simulation to calibrate our detection strategy for a given void definition and galaxy tracer density. We then identify cosmic voids in Dark Energy Survey (DES) Year 1 data and stack the Planck 2015 lensing convergence map on their locations, probing the consistency of simulated and observed void lensing signals. When fixing the shape of the stacked convergence profile to that calibrated from simulations, we find imprints at the 3σ significance level for various analysis choices. The best measurement strategies based on the MICE calibration process yield S/N ≈ 4 for DES Y1, and the best-fitting amplitude recovered from the data is consistent with expectations from MICE (A ≈ 1). Given these results as well as the agreement between them and N-body simulations, we conclude that the previously reported excess integrated Sachs–Wolfe (ISW) signal associated with cosmic voids in DES Y1 has no counterpart in the Planck CMB lensing map.This work has made use of CosmoHub (see Carretero et al. 2017).
CosmoHub has been developed by the Port d’Informacio Cient ´ ´ıfica
(PIC), maintained through a collaboration of the Institut de F´ısica
d’Altes Energies (IFAE) and the Centro de Investigaciones Energeticas, Medioambientales y Tecnol ´ ogicas (CIEMAT), and was ´
partially funded by the ‘Plan Estatal de Investigacion Cient ´ ´ıfica y
Tecnica y de Innovaci ´ on’ program of the Spanish government. ´
Funding for the DES Projects has been provided by the US Department of Energy, the US National Science Foundation, the Ministry
of Science and Education of Spain, the Science and Technology
Facilities Council of the United Kingdom, the Higher Education
Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign,
the Kavli Institute of Cosmological Physics at the University of
Chicago, the Center for Cosmology and Astro-Particle Physics at the
Ohio State University, the Mitchell Institute for Fundamental Physics
and Astronomy at Texas A&M University, Financiadora de Estudos
e Projetos, Fundac¸ao Carlos Chagas Filho de Amparo ˜ a Pesquisa do `
Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento
Cient´ıfico e Tecnologico and the Minist ´ erio da Ci ´ encia, Tecnologia ˆ
e Inovac¸ao, the Deutsche Forschungsgemeinschaft, and the Collab- ˜
orating Institutions in the Dark Energy Survey.
The Collaborating Institutions are Argonne National Laboratory,
the University of California at Santa Cruz, the University of
Cambridge, Centro de Investigaciones Energeticas, Medioambien- ´
tales y Tecnologicas-Madrid, the University of Chicago, Univer- ´
sity College London, the DES-Brazil Consortium, the University
of Edinburgh, the Eidgenossische Technische Hochschule (ETH) ¨
Zurich, Fermi National Accelerator Laboratory, the University of ¨
Illinois at Urbana-Champaign, the Institut de Ciencies de l’Espai `
(IEEC/CSIC), the Institut de F´ısica d’Altes Energies, Lawrence
Berkeley National Laboratory, the Ludwig-Maximilians Universitat¨
Munchen and the associated Excellence Cluster Universe, the Uni- ¨
versity of Michigan, the National Optical Astronomy Observatory,
the University of Nottingham, The Ohio State University, the
University of Pennsylvania, the University of Portsmouth, SLAC
National Accelerator Laboratory, Stanford University, the University
of Sussex, Texas A&M University, and the OzDES Membership
Consortium.
This paper is based in part on observations at Cerro Tololo InterAmerican Observatory, National Optical Astronomy Observatory,
which is operated by the Association of Universities for Research in
Astronomy (AURA) under a cooperative agreement with the National
Science Foundation.
The DES data management system is supported by the National Science Foundation under Grant Numbers AST-1138766
and AST-1536171. The DES participants from Spanish institutions are partially supported by MINECO under grants AYA2015-
71825, ESP2015-66861, FPA2015-68048, SEV-2016-0588, SEV2016-0597, and MDM-2015-0509, some of which include ERDF
funds from the European Union. IFAE is partially funded by the
CERCA program of the Generalitat de Catalunya.
Research leading to these results has received funding from the
European Research Council under the European Union’s Seventh
Framework Program (FP7/2007-2013) including ERC grant agreements 240672, 291329, 306478, and 615929. We acknowledge
support from the Brazilian Instituto Nacional de Cienciae Tecnologia ˆ
(INCT) e-Universe (CNPq grant 465376/2014-2).
This paper has been authored by Fermi Research Alliance, LLC
under Contract No. DE-AC02-07CH11359 with the US Department
of Energy, Office of Science, Office of High Energy Physics.
PV acknowledges the support from the grant MIUR PRIN 2015
‘Cosmology and Fundamental Physics: illuminating the Dark Universe with Euclid’.
AK has been supported by a Juan de la Cierva fellowship from
MINECO with project number IJC2018-037730-I. Funding for this
project was also available in part through SEV-2015-0548 and
AYA2017-89891-P.
This project has also received funding from the European Union’s
Horizon 2020 research and innovation programme under the Marie
Skłodowska-Curie grant agreement No. 754558.Peer reviewe
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