Conversion Problems: How (Not) to Determine Molecular Masses in Dwarf Galaxies [PDF]
, 2001 The determination of molecular gas masses in star forming dwarf irregular galaxies is crucial to assess the star formation process in these objects. But the derivation of the molecular gas content of dwarf galaxies has been a long-standing problem.
S. Huettemeister
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CHEMICAL EVOLUTION OF THE GALAXY: THE G-DWARF PROBLEM AND RADIOACTIVE CHRONOLOGY REVISITED TAKING ACCOUNT OF THE THICK DISK [PDF]
, 2001 Thin and Thick disk metallicities overlap, but alpha(Fe) relations differ; there is also a hiatus in time before the first thin-disk stars, with a minimum metallicity [Fe/H] = -0.6. Thus there are two `G-dwarf' problems. We fit metallicity distribution functions (MDFs) for the two disks derived by Wyse & Gilmore (1995) with analytical models (for O
B. E. J. Pagel
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A Possible "Too-Many-Satellites" Problem in the Isolated Dwarf Galaxy DDO 161 [PDF]
The abundance of satellite galaxies provides a direct test of $Λ$CDM on small scales. While satellites of Milky Way-mass galaxies are well studied, those of dwarf galaxies remain largely unexplored. We present a systematic search for satellites around the isolated dwarf galaxy DDO 161 ($M_\star \approx 10^{8.4}\, M_\odot$) at a distance of 6 Mpc.
Li, Jiaxuan +4 more
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Lack of nuclear clusters in dwarf spheroidal galaxies: implications for massive black holes formation and the cusp/core problem [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 12 pages, 14 figures, 4 tables, in press in the ...
ARCA SEDDA, MANUEL +1 more
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Addressing the core-cusp and diversity problem of dwarf and disk galaxies using cold collisionless DARKexp theory [PDF]
Journal of Cosmology and Astroparticle PhysicsAbstract Dwarf galaxies are observed to have linearly rising rotation curves, which indicate constant density cores in their centers. These do not arise naturally from dark matter only simulations, giving rise to the “core-cusp” problem.
Liliya L.R. Williams +2 more
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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
doaj +1 more source
Reconciling large- and small-scale structure in Twin Higgs models
Journal of High Energy Physics, 2017 We study possible extensions of the Twin Higgs model that solve the Hierarchy problem and simultaneously address problems of the large- and small-scale structures of the Universe.
Valentina Prilepina, Yuhsin Tsai
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Astrophysical site(s) of r-process elements in galactic chemodynamical evolution model
EPJ Web of Conferences, 2016 Astrophysical site(s) of rapid neutron-capture process (r-process) is (are) not identified yet. Although core-collapse supernovae have been regarded as one of the possible candidates of the astrophysical site of r-process, nucleosynthesis studies suggest
Hirai Yutaka +5 more
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Botanical Extract–Infused Shampoo and Hair Tonic for Hair Loss in Androgenetic Alopecia: A TREND‐Compliant, Prospective Single‐Arm Preexperimental Study [PDF]
J Cosmet DermatolABSTRACT Background Androgenetic alopecia (AGA) is the most prevalent form of hair loss, often leading to treatment discontinuation due to the adverse effects and perceived ineffectiveness of conventional treatments. Botanical extracts are gaining attention for their potential benefits in managing AGA with minimal side effects.
Choi D, Shin W.
europepmc +2 more sources
Visionaries and Crackpots, Maniacs and Saints: Existential Risk and the Politics of Longtermism
Ratio, Volume 38, Issue 4, Page 268-278, December 2025.ABSTRACT Despite advancing strong claims about our collective priorities, longtermism has received little attention in debates in political philosophy. I first provide an account of longtermism that highlights the way it departs from established work on intergenerational justice.
Alex McLaughlin
wiley +1 more source