Catching Tidal Dwarf Galaxies at a Later Evolutionary Stage with ALFALFA
The Astronomical Journal, 2023 We present deep optical imaging and photometry of four objects classified as “Almost-Dark” galaxies in the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey because of their gas-rich nature and extremely faint or missing optical emission in ...
Laurin M. Gray +13 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
Signatures of Galaxy-Cluster Interactions: Spiral Galaxy Rotation Curve Asymmetry, Shape, and Extent [PDF]
, 2000 The environmental dependencies of the characteristics of spiral galaxy rotation curves are studied in this work. We use our large, homogeneously collected sample of 510 cluster spiral galaxy rotation curves to test the claim that the shape of a galaxy's ...
Adabi M. G. +16 more
core +4 more sources
GALAXY INTERACTIONS IN COMPACT GROUPS. I. THE GALACTIC WINDS OF HCG16 [PDF]
, 2013 Using the WiFeS integral field spectrograph, we have undertaken a series of observations of star-forming galaxies in compact groups. In this first paper dedicated to the project, we present the analysis of the spiral galaxy NGC 838, a member of the ...
F. Vogt, M. Dopita, L. Kewley
semanticscholar +1 more source
Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies
The Astrophysical Journal Letters, 2023 Based on the atomic-hydrogen (H i ) observations using the Five-hundred-meter Aperture Spherical radio Telescope, we present a detailed study of the gas-rich massive S0 galaxy NGC 1023 in a nearby galaxy group.
Jin-Long Xu +8 more
doaj +1 more source
The importance of galaxy interactions in triggering type II quasar activity [PDF]
, 2012 We present deep Gemini Multi-Object Spectrograph-South optical broad-band images for a complete sample of 20 Sloan Digital Sky Survey selected type II quasars taken from Zakamska et al., with redshifts in the range 0.3 < z < 0.41 and [O iii]λ5007 ...
P. Bessiere +3 more
semanticscholar +1 more source
Are luminous radio-loud active galactic nuclei triggered by galaxy interactions? [PDF]
, 2011 We present the results of a comparison between the optical morphologies of a complete sample of 46 southern 2 Jy radio galaxies at intermediate redshifts (0.05
C. R. Almeida +9 more
semanticscholar +1 more source
Imagery and long-slit spectroscopy of the Polar-Ring Galaxy AM2020-504 [PDF]
, 2012 Interactions between galaxies are very common. There are special kinds of interactions that produce systems called Polar Ring Galaxies (PRGs), composed by a lenticular, elliptical, or spiral host galaxy, surrounded by a ring of stars and gas, orbiting in
Dors, O. +4 more
core +1 more source
Chemical evolution during gas-rich galaxy interactions [PDF]
, 2011 We perform and analyse a set of galaxy interactions performed by using a self-consistent chemo-hydrodynamical model which includes star formation, supernova (SN) feedback and chemical evolution.
Josefa Pérez +2 more
semanticscholar +1 more source
FAST Reveals New Evidence for M94 as a Merger
The Astrophysical Journal, 2023 We report the first high-sensitivity H i observation toward the spiral galaxy M94 with the Five-hundred-meter Aperture Spherical radio Telescope. From these observations, we discovered that M94 has a very extended H i disk, twice larger than that ...
Ruilei Zhou +6 more
doaj +1 more source