Navegação Ciências Exatas e da Terra por Título
Resultados 5936-5955 de 5955
-
Young star clusters immersed in intermediate-age fields in the Large Magellanic Cloud bar
(2003) [Artigo de periódico]We present Washington System photometry for 11 star clusters immersed in the north-west part of the Large Magellanic Cloud (LMC) bar, centred on the intermediate-age clusters NGC 1865 and SL 244. The fields are heavily ... -
Young star clusters in the Large Magellanic Cloud : NGC 1805 and 1818
(2001) [Artigo de periódico]We present colour-magnitude diagrams for two rich (~~104 M̛) Large Magellanic Cloud star clusters with ages ~~ 107 yr, constructed from optical and near-infrared data obtained with the Hubble Space Telescope. These data ... -
Young (α/Fe)-enhanced stars discovered by CoRoT and APOGEE : what is their origin?
(2015) [Artigo de periódico]We report the discovery of a group of apparently young CoRoT red-giant stars exhibiting enhanced [ /Fe] abundance ratios (as determined from APOGEE spectra) with respect to solar values. Their existence is not explained ... -
Yukawa particles in a confining potential
(2014) [Artigo de periódico]We study the density distribution of repulsive Yukawa particles confined by an external potential. In the weak coupling limit, we show that the mean-field theory is able to accurately account for the particle distribution. ... -
Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV
(2020) [Artigo de periódico]Measurement of Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity ... -
Zero-inflated-censored Weibull and gamma regression models to estimate wild boar population dispersal distance
(2021) [Artigo de periódico]The dynamics of the wild boar population has become a pressing issue not only for ecological purposes, but also for agricultural and livestock production. The data related to the wild boar dispersal distance can have a ... -
Zig-zag networks of self-excited periodic oscillations in a tunnel diode and a fiber-ring laser
(2013) [Artigo de periódico]We report numerical evidence showing that periodic oscillations can produce unexpected andwide-ranging zigzag parameter networks embedded in chaos in the control space of nonlinear systems. Such networks interconnect ... -
Zircon U-Pb geochronology, Sm-Nd and Pb-Pb isotope systematics of Ediacaran post-collisional high-silica Acampamento Velho volcanism at the Tupanci area, NW of the Sul-Rio-Grandense Shield, Brazil
(2017) [Artigo de periódico]We present new U-Pb zircon ages and Sm-Nd-Pb isotopic data for volcanic and hypabyssal acid rocks from the northernmost exposure of the Acampamento Velho Formation in the NW portion of the Sul-Rio-Grandense Shield, Brazil. ... -
Zooming into local active galactic nuclei : the power of combining SDSS-IV MaNGA with higher resolution integral field unit observations
(2017) [Artigo de periódico]Ionized gas outflows driven by active galactic nuclei (AGN) are ubiquitous in high-luminosity AGN with outflow speeds apparently correlated with the total bolometric luminosity of the AGN. This empirical relation and ... -
Αβ-crystallin and laminin-332 are prognostic markers for triple negative breast cancers in a brazilian series
(2019) [Artigo de periódico]Purpose: Association between increased αβ-crystallin (ABC) and abnormal LN332 (LN332) expression in triple negative (TNBC) and basal-like (BLBC) breast cancers has been suggested recently. This study aims to evaluate ABC ... -
Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02 TeV at the LHC
(2021) [Artigo de periódico]The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN=5.02 TeV. These new measurements show a clear decrease ... -
Λc+ production in Pb–Pb collisions at √sNN=5.02 TeV
(2019) [Artigo de periódico]A measurement of the production of prompt Λc+baryons in Pb–Pb collisions at TeV with the ALICE detector at the LHC is reported. The Λc+ and Λ-c- were reconstructed at midrapidity (|y|<0.5) via the hadronic decay channel ... -
Λ+c production in pp collisions at √s = 7 TeV and in p-Pb collisions at √sNN = 5.02 TeV
(2018) [Artigo de periódico]The pT-di erential production cross section of prompt +c charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at p s = 7TeV and in p-Pb collisions at p sNN = 5:02TeV at ... -
ΛK femtoscopy in Pb-Pb collisions at √sNN = 2.76
(2021) [Artigo de periódico]The first measurements of the scattering parameters of K pairs in all three charge combinations ( K+, K−, and K0 S ) are presented. The results are achieved through a femtoscopic analysis of K correlations in Pb-Pb collisions ... -
π0 and η meson production in proton-proton collisions at √s=8 TeV
(2018) [Artigo de periódico]An invariant differential cross section measurement of inclusive π0 and η meson production atmid-rapidity in pp collisions at √ s = 8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons ... -
Σ (1385)± resonance production in Pb–Pb collisions at √sNN = 5.02 TeV
(2023) [Artigo de periódico]Hadronic resonances are used to probe the hadron gas produced in the late stage of heavy-ion collisions since they decay on the same timescale, of the order of 1–10 fm/c, as the decoupling time of the system. In the hadron ... -
ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at √sNN=5.02 TeV
(2021) [Artigo de periódico]The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair √sNN = 5.02 TeV is measured with the muon spectrometer of the ALICE detector at the LHC. The yields as well as the nuclear modification ... -
Υ production in p–Pb collisions at √sNN=8.16 TeV
(2020) [Artigo de periódico]Y production in p–Pb interactions is studied at the centre-of-mass energy per nucleon–nucleon collision √sNN=8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances ... -
ϒ suppression at forward rapidity in Pb–Pb collisions at √sNN = 5.02 TeV
(2019) [Artigo de periódico]Inclusive ϒ(1S)and ϒ(2S)production have been measured in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair √sNN=5.02TeV, using the ALICE detector at the CERN LHC. The ϒmesons are reconstructed in the ... -
Φ meson production at forward rapidity in Pb–Pb collisions at √sNN = 2.76 TeV
(2018) [Artigo de periódico]φ meson measurements provide insight into strangeness production, which is one of the key observables for the hot medium formed in high-energy heavy-ion collisions. ALICE measured φ production through its decay in muon ...
