Results 1 to 10 of about 527,516 (207)
Dwarf Galaxies with the Highest Concentration Are Not Thicker than Ordinary Dwarf Galaxies [PDF]
The Astrophysical Journal, 2023 The formation mechanism of high-concentration dwarf galaxies is still a mystery. We perform a comparative study of the intrinsic shape of nearby low-mass galaxies with different stellar concentration.
Lijun Chen +7 more
doaj +2 more sources
Dwarf Galaxies in Voids: Dark Matter Halos and Gas Cooling [PDF]
Advances in Astronomy, 2010 Galaxy surveys have shown that luminous galaxies are mainly distributed in large filaments and galaxy clusters. The remaining large volumes are virtually devoid of luminous galaxies.
Matthias Hoeft, Stefan Gottlöber
doaj +4 more sources
Tidal Dwarf Galaxies and Missing Baryons [PDF]
Advances in Astronomy, 2010 Tidal dwarf galaxies form during the interaction, collision, or merger of massive spiral galaxies. They can resemble “normal” dwarf galaxies in terms of mass, size, and become dwarf satellites orbiting around their massive progenitor.
Frederic Bournaud
doaj +4 more sources
A Comparison of Outflow Properties in AGN Dwarfs versus Star-forming Dwarfs [PDF]
The Astrophysical Journal, 2023 Feedback likely plays a crucial role in resolving discrepancies between observations and theoretical predictions of dwarf galaxy properties. Stellar feedback was once believed to be sufficient to explain these discrepancies, but it has thus far failed to
Archana Aravindan +7 more
doaj +2 more sources
The nature of red dwarf galaxies [PDF]
Astrophys.J.697:247-257,2009, 2008 Using dark matter halos traced by galaxy groups selected from the Sloan Digital Sky Survey Data Release 4, we find that about 1/4 of the faint galaxies ($\rmag >-17.05$, hereafter dwarfs) that are the central galaxies in their own halo are not blue and star forming, as expected in standard models of galaxy formation, but are red.
Adelman-McCarthy +27 more
arxiv +5 more sources
Star Formation in Isolated Dwarf Galaxies Hosting Tidal Debris: Extending the Dwarf-Dwarf Merger Sequence [PDF]
Astronomical Journal, 2019 Like massive galaxies, dwarf galaxies are expected to undergo major mergers with other dwarfs. However, the end state of these mergers and the role that merging plays in regulating dwarf star formation is uncertain. Using imaging from the Hyper Suprime-Cam Subaru Strategic program, we construct a sample of dwarf-dwarf mergers and examine the star ...
Erin Kado-Fong +6 more
arxiv +3 more sources
Characteristic size and mass of galaxies in the Bose–Einstein condensate dark matter model [PDF]
Physics Letters B, 2016 We study the characteristic length scale of galactic halos in the Bose–Einstein condensate (or scalar field) dark matter model. Considering the evolution of the density perturbation we show that the average background matter density determines the ...
Jae-Weon Lee
doaj +4 more sources
Galaxy threshing and the formation of ultra-compact dwarf galaxies [PDF]
, 2001 Recent spectroscopic and morphological observational studies of galaxies around NGC 1399 in the Fornax Cluster (Drinkwater et al. 2000b) have discovered several `ultra-compact dwarf' galaxies with intrinsic sizes of $\sim$ 100 pc and absolute $B$ band magnitudes ranging from -13 to -11 mag.
Binggeli B. +4 more
arxiv +3 more sources
A Stellar Mass Threshold for Quenching of Field Galaxies [PDF]
, 2012 We demonstrate that dwarf galaxies (10^7 < M_stellar < 10^9 Msun) with no active star formation are extremely rare (<0.06%) in the field. Our sample is based on the NASA-Sloan Atlas which is a re-analysis of the Sloan Digital Sky Survey Data Release 8.
Aihara +37 more
arxiv +3 more sources
Properties of the Dwarf Galaxy Population in Galaxy Clusters [PDF]
, 2008 We present the observational properties of the dwarf galaxy population (Mr > M*+1) corresponding to one of the largest samples of spectroscopically confirmed galaxy cluster members reported in the literature. We have observed that red dwarf galaxies (u-r > 2.22) share the same cluster environment as the brightest cluster members (Mr < -21), but are not
Aguerri +26 more
arxiv +3 more sources