Results 31 to 40 of about 1,775 (210)
Star Formation in Satellite Galaxies [PDF]
The Astronomical Journal, 2006 We present narrow-band observations of the H$ $ emission in a sample of 31 satellite orbiting isolated giant spiral galaxies.
Guitérrez, C. M. +3 more
openaire +3 more sources
The Morphological Evolution of Galaxy Satellites
Astrophysics and Space Science, 2001 We study the evolution of galaxy satellites with high resolution N-body simulations. Satellites are modeled as replicas of typical low and high surface brightness galaxies (LSBs and HSBs). Encounters on high eccentricity orbits (as typical in hierarchical models of galaxy formation) strip LSBs of most of their stars and tend to decrease their surface ...
Mayer, Lucio +5 more
openaire +2 more sources
The Astrophysical Journal, 2023 Using the IllustrisTNG simulation, we study the interaction of large-scale shocks with the circumgalactic medium (CGM) and interstellar medium (ISM) of star-forming (SF) satellite galaxies in galaxy clusters.
Hao Li +5 more
doaj +1 more source
Self-interacting dark matter on small and large scales
SciPost Physics Proceedings, 2023 In the self-interacting dark matter paradigm (hereafter SIDM), dark matter (DM) is assumed to have non-gravitational interactions with itself. SIDM has been constrained by observations of galaxy clusters. More recently, measurements of large DM densities
Camila A. Correa
doaj +1 more source
Radialization of Satellite Orbits in Galaxy Mergers
The Astrophysical Journal, 2022 Abstract We consider the orbital evolution of satellites in galaxy mergers, focusing on the evolution of eccentricity. Using a large suite of N-body simulations, we study the phenomenon of satellite orbital radialization—a profound increase in the eccentricity of its orbit as it decays under dynamical friction.
Eugene Vasiliev +2 more
openaire +2 more sources
Satellite galaxies in nearby groups of galaxies
, 2015 We analyse distribution, kinematics and star-formation (SF) properties of satellite galaxies in three different samples of nearby groups. We find that studied groups are generally well approximated by low-concentration NFW model, show a variety of LOS velocity dispersion profiles and signs of SF quenching in outskirts of dwarf satellite galaxies.
Vennik, J., Hopp, U.
openaire +2 more sources
More Satellites of Spiral Galaxies [PDF]
The Astrophysical Journal, 1997 We present a revised and expanded catalog of satellite galaxies of a set of isolated spiral galaxies similar in luminosity to the Milky Way. This sample of 115 satellites, 69 of which were discovered in our multifiber redshift survey, is used to further probe the results obtained from the original sample (Zaritsky et al. 1993).
Zaritsky, Dennis +3 more
openaire +2 more sources
Solid Harmonic Wavelet Bispectrum for Image Analysis
Advanced Science, EarlyView.The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown +3 more
wiley +1 more source
The THESEUS Space Mission and the Infrared Telescope Calibration Unit
Astronomische Nachrichten, EarlyView.ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó +9 more
wiley +1 more source
A Possible “Too-many-satellites” Problem in the Isolated Dwarf Galaxy DDO 161
The Astrophysical Journal LettersThe abundance of satellite galaxies provides a direct test of ΛCDM and galaxy formation physics on small scales. While satellites of Milky Way-mass galaxies are well studied, those of dwarf galaxies remain largely unexplored.
Jiaxuan Li +4 more
doaj +1 more source