Astrophysical probes of the Vainshtein mechanism: Stars and galaxies [PDF]
Physical Review D, 2015 Ghost-free theories beyond the Horndeski class exhibit a partial breaking of the Vainshtein mechanism inside non-relativistic sources of finite extent. We exploit this breaking to identify new and novel astrophysical probes of these theories. Non-relativistic objects feel a gravitational force that is weaker than that predicted by general relativity ...
Koyama, Kazuya, Sakstein, Jeremy
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A new chemodynamical tool to study the evolution of galaxies in the local Universe: a quick and accurate numerical technique to compute gas cooling rate for any chemical composition [PDF]
, 2007 We have developed a quick and accurate numerical tool to compute gas cooling whichever its chemical composition.Comment: 3 pages, 2 figures, to appear in the Proceedings of "Heating vs.
Champavert, Nicolas, Wozniak, Hervé
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Tales within Tales and Cutoffs within Cutoffs: What Sets the Mass Scale for Galaxies? [PDF]
, 2001 Please answer ``yes'' or ``no'': 1. Does the mass function for clusters of galaxies cut off exponentially? 2. Does the luminosity function for galaxies cut off exponentially? 3. Is the dependence of virial velocity on galaxy luminosity a power law?
Schechter, Paul L.
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Spiral galaxies with large optical warps [PDF]
, 1999 As a result of our statistical study of 540 edge-on galaxies, we present here the images and preliminary statistical analysis of a sub-sample of 60 galaxies, that were selected to be S-type warped spirals.
Combes, Francoise, Reshetnikov, Vladimir
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ASSESSING ASTROPHYSICAL UNCERTAINTIES IN DIRECT DETECTION WITH GALAXY SIMULATIONS [PDF]
The Astrophysical Journal, 2016 ABSTRACT We study the local dark matter velocity distribution in simulated Milky Way-mass galaxies, generated at high resolution with both dark matter and baryons. We find that the dark matter in the solar neighborhood is influenced appreciably by the inclusion of baryons, increasing the speed of dark matter particles compared to dark ...
Jonathan D. Sloane +3 more
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Photometric and kinematical study of nearby groups of galaxies around IC 65 and NGC 6962 [PDF]
, 2006 We discuss the structure, galaxy content and kinematics of a sparse, probably collapsing group around IC 65 and an evolved rich group around NGC 6962Comment: Poster contribution on 2 pages with 2 figures to be published in ESO Astrophysics Symposia ...
Tago, E., Vennik, J.
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Cold fronts: probes of plasma astrophysics in galaxy clusters [PDF]
Journal of Plasma Physics, 2016 The most massive baryonic component of galaxy clusters is the ‘intracluster medium’ (ICM), a diffuse, hot, weakly magnetized plasma that is most easily observed in the X-ray band. Despite being observed for decades, the macroscopic transport properties of the ICM are still not well constrained.
Roediger, Elke, ZuHone, John A.
openaire +4 more sources
Observed Properties of Dark Matter on Small Spatial Scales [PDF]
, 2007 The nature of dark matter is one of the outstanding questions of astrophysics. The internal motions of member stars reveal that the lowest luminosity galaxies in the Local Group are the most dark-matter dominated.
Benson +4 more
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The black hole mass of BL Lacs from stellar velocity dispersion of the host galaxy [PDF]
, 2001 We present the first results from our on-going program to estimate black hole masses [M(BH)] of nearby BL Lac objects. The estimates are based on stellar velocity dispersion (sigma) of the BL Lac host galaxies from optical spectroscopy, and the recently ...
Falomo, Renato +2 more
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Optical surface photometry of radio galaxies - II. Observations and data analysis [PDF]
, 1999 Optical imaging observations for 50 radio galaxies are presented. For each object isophotal contours, photometric profiles, structural parameters (position angle, ellipticity, Fourier coefficients), and total magnitudes are given.
Falomo, R. +3 more
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