Results 1 to 10 of about 68 (66)
On the Dwarf Galaxy Rotation Curve Diversity Problem [PDF]
Galaxies, 2018 In this paper, we show how baryonic physics can solve the problem of the striking diversity in dwarf galaxy rotation curves shapes. To this aim, we compare the distribution of galaxies of the SPARC sample, in the plane V2kpc-VRlast (V2kpc being the ...
Antonino Del Popolo +2 more
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The M dwarf problem in the Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 To be published in Monthly Notices of the RAS by the Royal Astronomical Society and Blackwell Publishing.
Vincent M. Woolf, Andrew A. West
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Extension of M Dwarf Spectra Based on Adversarial AutoEncoder
Universe, 2021 M dwarfs are main sequence stars and they exist in all stages of galaxy evolution. As the living fossils of cosmic evolution, the study of M dwarfs is of great significance to the understanding of stars and the stellar populations of the Milky Way ...
Jiyu Wei +4 more
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The spatial distribution of globular clusters in dwarf spheroidal galaxies and the timing problem [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT The dynamical friction time-scale of massive globular clusters (GCs) in the inner regions of cuspy dark haloes in dwarf spheroidal (dSph) galaxies can be much shorter than the Hubble time. This implies that a small fraction of the GCs is expected to be caught close to the centre of these galaxies.
Sanchez-Salcedo, F. J., Lora, V.
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Missing Dwarf Problem in Galaxy Clusters [PDF]
Publications of the Astronomical Society of Japan, 2007 Abstract We investigated the formation and evolution of CDM subhalos in galaxy-sized and cluster-sized halos by means of $N$-body simulations. Our aim was to make clear what the “dwarf galaxy problem” is. It has been argued that the number of subhalos in simulated galaxy-sized halos is too large compared with the observed number of ...
Yoko Funato +2 more
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A possible dwarf galaxy satellite-of-satellite problem in ΛCDM
Astronomy & Astrophysics, 2023 Dark matter clusters on all scales, and it is therefore expected that even substructure should host its own substructure. Using the Extragalactic Distance Database, we searched for dwarf-galaxy satellites of dwarf galaxies, that is, satellite-of-satellite galaxies, corresponding to these substructures of substructure. From investigation of Hubble Space
Oliver Müller +4 more
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The G Dwarf Problem Exists in Other Galaxies [PDF]
The Astronomical Journal, 1996 14 pages, LaTeX includes 3 postscript figures. Uses AAS LaTeX v 4.0 and times.sty. Accepted for publication in the Astronomical Journal.
Guy Worthey, Ben Dorman, Lewis A. Jones
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An analytical approach to the dwarf galaxies cusp problem [PDF]
Astronomy & Astrophysics, 2010 An analytical solution for the discrepancy between observed core-like profiles and predicted cusp profiles in dark matter halos is studied. We calculate the distribution function for Navarro-Frenk-White halos and extract energy from the distribution, taking into account the effects of baryonic physics processes.
R. S. de Souza +3 more
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The Cusp–Core Problem in Gas-Poor Dwarf Spheroidal Galaxies [PDF]
Galaxies, 2021 This review deals with the inconsistency of inner dark matter density profiles in dwarf galaxies, known as the cusp–core problem. In particular, we aim to focus on gas-poor dwarf galaxies. One of the most promising solutions to this cold dark matter small-scale issue is the stellar feedback, but it seems to be only designed for gas-rich dwarfs. However,
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An Internal Second-Parameter Problem in the Sculptor Dwarf Spheroidal Galaxy [PDF]
The Astrophysical Journal, 1999 15 pages, 4 figures, LaTeX, uses aastex.
Michael H. Siegel +4 more
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