Results 21 to 30 of about 314,301 (152)
Phase-Space Correlations among Systems of Satellite Galaxies
Galaxies, 2021 Driven by the increasingly complete observational knowledge of systems of satellite galaxies, mutual spatial alignments and relations in velocities among satellites belonging to a common host have become a productive field of research.
Marcel S. Pawlowski
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Acknowledgement to Reviewers of Galaxies in 2014
Galaxies, 2015 The editors of Galaxies would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2014:[...]
Galaxies Editorial Office
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Acknowledgement to Reviewers of Galaxies in 2018
Galaxies, 2019 Rigorous peer-review is the cornerstone of high-quality academic publishing [...]
Galaxies Editorial Office
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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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A New View of the Size-Mass Distribution of Galaxies: Using $r_{20}$ and $r_{80}$ instead of $r_{50}$ [PDF]
, 2019 When investigating the sizes of galaxies it is standard practice to use the half-light radius, $r_{50}$. Here we explore the effects of the size definition on the distribution of galaxies in the size -- stellar mass plane.
Miller, Tim B. +3 more
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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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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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