Inner Halo Shapes of Dwarf Galaxies: Resolving the Cusp/Core Problem [PDF]
Symposium - International Astronomical Union, 2004 We derive inner dark matter halo density profile slopes for a sample of 200 dwarf galaxies by inverting rotation curves obtained from high-quality, long-slit optical spectra. Using simulations to assess the impact of long-slit observing and data processing errors on our measurements, we conclude that our observations are consistent with the cuspy halos
Kristine Spekkens, Riccardo Giovanelli
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Dwarf galaxy rotation curves and the core problem of dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 33 pages, 24 figures. Accepted for publication in MNRAS.
Frank C. van den Bosch, R. A. Swaters
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Orbits and adiabatic contraction in scalar-field dark matter halos: revisiting the cusp-core problem in dwarf galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Bose–Einstein-condensed dark matter, also called scalar field dark matter (SFDM), has become a popular alternative to cold dark matter (CDM), because it predicts galactic cores, in contrast to the cusps of CDM halos (‘cusp-core problem’).
Kevin Pils, Tanja Rindler-Daller
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Is The Vast Polar Structure Of Dwarf Galaxies A Serious Problem For ΛCDM? [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 14 pages, 6 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society.
Andrew Lipnicky, Sukanya Chakrabarti
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New Type Ia Supernova Yields and the Manganese and Nickel Problems in the Milky Way and Dwarf Spheroidal Galaxies [PDF]
The Astrophysical Journal, 2020 Abstract In our quest to identify the progenitors of Type Ia supernovae (SNe Ia), we first update the nucleosynthesis yields for both near-Chandrasekhar- (Ch) and sub-Ch-mass white dwarfs (WDs) for a wide range of metallicities with our 2D hydrodynamical code and the latest nuclear reaction rates.
Chiaki Kobayashi +2 more
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Chemical Evolution of Elliptical Galaxies: Mg2 Gradients and G-Dwarf Problem [PDF]
Highlights of Astronomy, 1998 Stellar populations of elliptical galaxies were studied extensively in the recent past (eg., Arimoto & Yoshii 1987; Buzzoni et al. 1992; Worthey 1994; Kodama & Arimoto 1997). However, colours and line-strengths analysed by these approaches came mainly from central regions of galaxies and possible variations of stellar population structure ...
N. Arimoto, Chiaki Kobayashi
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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.
Rafael S. de Souza, Émille E. O. Ishida
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The Rotation Curves of Dwarf Galaxies: A Problem for Cold Dark Matter? [PDF]
The Astrophysical Journal, 2004 We address the issue of accuracy in recovering density profiles from observations of rotation curves of galaxies. We ``observe'' and analyze our models in much the same way as observers do the real galaxies. We find that the tilted ring model analysis produces an underestimate of the central rotational velocity.
George Rhee +4 more
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The Cusp/Core Problem in Galactic Halos: Long-Slit Spectra for a Large Dwarf Galaxy Sample [PDF]
The Astronomical Journal, 2005 17 pages, 14 figures; uses emulateapj. Accepted for publication in AJ.
Kristine Spekkens +2 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.
F. J. Sánchez-Salcedo, V. Lora
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