Documentdetail
ID kaart
oai:arXiv.org:2406.13732
Onderwerp
Astrophysics - Astrophysics of Gal... Astrophysics - Cosmology and Nonga...Auteur
Kravtsov, AndreyCategorie
wetenschappen: astrofysica
Jaar
2024
vermelding datum
26-06-2024
Trefwoorden
range dwarf 200c}$ $m_{\rm stellar astrophysics relation dark dm} <r_{1/2} model $ massBeschrijving
I compare the dark matter content within stellar half-mass radius expected in a $\Lambda$CDM-based galaxy formation model with existing observational estimates for the observed dwarf satellites of the Milky Way and ultra-diffuse galaxies (UDGs).
The model reproduces the main properties and scaling relations of dwarf galaxies, in particular their stellar mass-size relation.
I show that
the model also reproduces the relation between the dark matter mass within the
half-mass radius, $M_{\rm dm}( The scatter in the $M_{\rm dm}( I also show the $M_{\rm dm}( The upper limits on $M_{\rm
dm}( The most dark
matter-deficient galaxies of a given size correspond to halos with the smallest
concentrations and the largest ratios of $M_\star/M_{\rm 200c}$. Conversely,
the most dark matter-dominated galaxies are hosted by the highest concentration
halos with the smallest $M_\star/M_{\rm 200c}$ ratios. The model indicates that
the scatter between $M_{\rm dm}( Results
presented in this paper indicate that dark matter-deficient UDGs may represent
a tail of the expected dark matter profiles, especially if the effect of
feedback on these profiles is taken into account. ;Comment: 9 pages, 6 figures
Kravtsov, Andrey, 2024, On the dark matter content of ultra-diffuse galaxies
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