Results 41 to 50 of about 151,190 (310)
Acknowledgement to Reviewers of Galaxies in 2015
Galaxies, 2016 The editors of Galaxies would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2015. [...]
Galaxies Editorial Office
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Surface Density of Disk Galaxies in MOND
Universe, 2023 In this paper, we extend a paper by Milgrom (2009, MNRAS 398, 1023) dealing with the existence of a quasi-universal surface density for object of all mass and structure, if they are in the Newtonian regime, i.e., that their mean acceleration is larger ...
Antonino Del Popolo, Morgan Le Delliou
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Spirality: A Novel Way to Measure Spiral Arm Pitch Angle
Galaxies, 2022 We present the MATLAB code Spirality, a novel method for measuring spiral arm pitch angles by fitting galaxy images to spiral templates of known pitch. Computation time is typically on the order of 2 min per galaxy, assuming 8 GB of working memory.
Deanna Shields +9 more
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Direct Imaging of a Toroidal Magnetic Field in the Inner Jet of NRAO 150
Galaxies, 2016 Most formation models and numerical simulations cause a helical magnetic field to form, accelerate and collimate jets in active galactic nuclei (AGN). For this reason, observational direct evidence for the existence of these helical magnetic fields is of
Sol N. Molina +5 more
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Lensing by galaxy haloes in clusters of galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1997 17 pages, LaTeX file, MNRAS in ...
Natarajan, Priyamvada, Kneib, Jean-Paul
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Secondary evolution of galaxies investigated by N-body simulations [PDF]
, 2008 In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
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New Strong Constraints on the Central Behaviour of Spherical Galactic Models
Astronomy, 2023 First of all, we show that any spherically symmetric galactic model with integrated mass profile M(r)→0 as r→0 is physically correct close to the centre only provided that the circular velocity vc(r)→0 and the gravitational field g(r)→0 as r→0.
Marco Roncadelli, Giorgio Galanti
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Quantitative Analysis of Galaxy‐Galaxy Lensing [PDF]
The Astrophysical Journal, 1997 20 pages, Plain-Tex, no macros needed, including 8 figures, submitted to Astrophysical ...
Schneider, Peter, Rix, Hans-Walter
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Galaxy Zoo:dust in spiral galaxies [PDF]
, 2010 We investigate the effect of dust on spiral galaxies by measuring the inclination dependence of optical colours for 24 276 well-resolved Sloan Digital Sky Survey (SDSS) galaxies visually classified via the Galaxy Zoo project.
Masters, Karen L. +32 more
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Emission Knots and Polarization Swings of Swinging Jets
Galaxies, 2016 Knots (emission features in jets of active galactic nuclei) often show non-ballistic dynamics and variable emission/polarization properties. We model these features as emission pattern propagating in a jet that carries a helical magnetic field and is ...
Maxim Lyutikov, Evgeniya Kravchenko
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