Results 31 to 40 of about 24,015,970 (365)
Constraining Dark Energy from the Local Group Dynamics
The Astrophysical Journal Letters, 2023 This Letter develops a method to constrain the cosmological constant Λ from binary galaxies, focusing on the Milky Way and Andromeda galaxies. We provide an analytical solution to the two-body problem with Λ and show that the ratio between the Keplerian ...
David Benisty +2 more
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The APOSTLE simulations: solutions to the Local Group's cosmic puzzles [PDF]
, 2015 The Local Group of galaxies offer some of the most discriminating tests of models of cosmic structure formation. For example, observations of the Milky Way (MW) and Andromeda satellite populations appear to be in disagreement with N-body simulations of ...
Till Sawala +27 more
semanticscholar +1 more source
Reionization time of the Local Group and Local-Group-like halo pairs
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Patchy cosmic reionization resulted in the ionizing UV background asynchronous rise across the Universe. The latter might have left imprints visible in present-day observations. Several numerical simulation-based studies show correlations between the reionization time and overdensities and object masses today. To remove the mass
Jenny G Sorce +9 more
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Star Formation Histories with Gaia: The Galaxy and Beyond
Open Astronomy, 2003 ESA’s Gaia mission will provide accurate astrometric, photometric and spectroscopic data for millions of stars in the Galaxy and beyond. We discuss the prospects of using this vast amount of astrophysical information for understanding star formation ...
Kučinskas A. +3 more
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Galaxies, 2019 Several decades of observations of the most massive and most luminous stars have revealed a complex upper HR Diagram, shaped by mass loss, and inhabited by a variety of evolved stars exhibiting the consequences of their mass loss histories.
Roberta M. Humphreys
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BJPsych Open, 2020 BackgroundElectroconvulsive therapy (ECT) is recommended in treatment guidelines as an efficacious therapy for treatment-resistant depression. However, it has been associated with loss of autobiographical memory and short-term reduction in new learning ...
Richard J. Porter +12 more
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Chains of Group Localizations [PDF]
Communications in Algebra, 2011 We construct long sequences of localization functors L_a in the category of abelian groups such that L_a > L_b for infinite cardinals a < b less than some k. For sufficiently large free abelian groups F and a < b we have proper inclusions of L_aF into L_bF.
openaire +3 more sources
The statistical challenge of constraining the low-mass IMF in local group dwarf galaxies [PDF]
, 2017 We use Monte Carlo simulations to explore the statistical challenges of constraining the characteristic mass ($m_c$) and width ($\sigma$) of a lognormal sub-solar initial mass function (IMF) in Local Group dwarf galaxies using direct star counts.
K. El-Badry, D. Weisz, E. Quataert
semanticscholar +1 more source
Cellular Covers of Local Groups [PDF]
Mediterranean Journal of Mathematics, 2018 We prove that, in the category of groups, the composition of a cellularization and a localization functor need not be idempotent. This provides a negative answer to a question of Emmanuel Dror Farjoun.
Ramón Flores, Jérôme Scherer
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Cotton leaf segmentation with composite backbone architecture combining convolution and attention
Frontiers in Plant Science, 2023 Plant leaf segmentation, especially leaf edge accurate recognition, is the data support for automatically measuring plant phenotypic parameters. However, adjusting the backbone in the current cutting-edge segmentation model for cotton leaf segmentation ...
Jingkun Yan +10 more
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