scholarly journals Tidal Disruption of Milky Way Satellites with Shallow Dark Matter Density Profiles

Galaxies ◽  
2016 ◽  
Vol 4 (4) ◽  
pp. 74 ◽  
Author(s):  
Ewa Łokas
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Matter Density ◽  
Tidal Disruption ◽  
Density Profiles ◽  
Dark Matter Density

Tidal evolution of dwarf galaxies with shallow dark matter density profiles

2012 ◽  
Vol 10 (H16) ◽  
pp. 346-346
Author(s):  
Ewa L. Łokas
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Local Group ◽  
Dwarf Galaxies ◽  
Dwarf Galaxy ◽  
Morphological Evolution ◽  
Matter Density ◽  
Density Profiles ◽  
Tidal Evolution ◽  
Dark Matter Density

AbstractOne of the scenarios for the formation of dwarf spheroidal galaxies in the Local Group proposes that the objects formed from late type dwarfs via tidal interaction with bigger galaxies such as the Milky Way and Andromeda. The scenario naturally explains the morphology-density relation observed for dwarf galaxies in the Local Group. Using N-body simulations we study the long-term tidal evolution of dwarf galaxies in the vicinity of the Milky Way. The dwarf galaxies were initially composed of stellar disks embedded in dark matter haloes of different inner density slopes including shallow ones recently obtained in N-body+hydro simulations of dwarf galaxy formation in isolation. Such progenitors were placed on five different orbits around the Milky Way and their evolution was followed for 10 Gyr. The outcome of the evolution, in terms of the mass loss, morphological transformation and randomization of stellar orbits depends very sensitively on the inner density slope of dark matter. The effects of tides are stronger for dwarfs with shallower slopes; they are more heavily stripped, in some cases down to the scale of ultra-faint satellites of the Milky Way or even dissolved completely with obvious implications for the missing satellites problem. The morphological evolution of the stellar component, from rotationally supported disks to spheroids dominated by random motions, also proceeds faster. In addition, bars which usually form at the first pericenter passage are created more easily and live longer in dwarfs with shallow dark matter density profiles on extended orbits.

scholarly journals Isolated dwarf galaxies: from cuspy to flat dark matter density profiles and metalicity gradients

2010 ◽  
Vol 514 ◽  
pp. A47 ◽  
Author(s):  
S. Pasetto ◽  
E. K. Grebel ◽  
P. Berczik ◽  
R. Spurzem ◽  
W. Dehnen
Keyword(s):  
Dark Matter ◽  
Dwarf Galaxies ◽  
Matter Density ◽  
Density Profiles ◽  
Dark Matter Density

scholarly journals NIHAO – IV: core creation and destruction in dark matter density profiles across cosmic time

2016 ◽  
Vol 456 (4) ◽  
pp. 3542-3552 ◽  
Author(s):  
Edouard Tollet ◽  
Andrea V. Macciò ◽  
Aaron A. Dutton ◽  
Greg S. Stinson ◽  
Liang Wang ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cosmic Time ◽  
Matter Density ◽  
Density Profiles ◽  
Dark Matter Density

scholarly journals On the physical origin of dark matter density profiles

2004 ◽  
Vol 352 (4) ◽  
pp. 1109-1120 ◽  
Author(s):  
Y. Ascasibar ◽  
G. Yepes ◽  
S. Gottlöber ◽  
V. Müller
Keyword(s):  
Dark Matter ◽  
Matter Density ◽  
Physical Origin ◽  
Density Profiles ◽  
Dark Matter Density

scholarly journals Diversity of Dark Matter Density Profiles in the Galactic Dwarf Spheroidal Satellites

2020 ◽  
Vol 904 (1) ◽  
pp. 45 ◽  
Author(s):  
Kohei Hayashi ◽  
Masashi Chiba ◽  
Tomoaki Ishiyama
Keyword(s):  
Dark Matter ◽  
Matter Density ◽  
Density Profiles ◽  
Dark Matter Density

scholarly journals Measure the local dark matter density with LAMOST spectroscopic survey

2015 ◽  
Vol 11 (S317) ◽  
pp. 330-331
Author(s):  
Chao Liu ◽  
Qiran Xia ◽  
Shude Mao
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Galactic Disk ◽  
Matter Density ◽  
Dark Matter Halo ◽  
Selection Effects ◽  
Local Rotation ◽  
Dark Matter Density ◽  
The North ◽  
North Galactic

AbstractThe local dark matter density plays the key role in the distribution of the dark matter halo near the Galactic disk. It will also answer whether a dark matter disk exists in the Milky Way. We measure the local dark matter density with LAMOST observed stars located at around the north Galactic pole. The selection effects of the observations are well considered and corrected. We find that the derived DM density, which is around 0.0159+0.0047−0.0057M⊙ pc−3 providing a flat local rotation curve.

scholarly journals Dark matter density profiles: a comparison of nonextensive theory with N-body simulations

2006 ◽  
Vol 453 (1) ◽  
pp. 21-25 ◽  
Author(s):  
T. Kronberger ◽  
M. P. Leubner ◽  
E. van Kampen
Keyword(s):  
Dark Matter ◽  
Matter Density ◽  
Density Profiles ◽  
Dark Matter Density

ERRATUM: "ON THE UNIVERSALITY OF BARYONS AND DARK MATTER DENSITY PROFILES"

2010 ◽  
Vol 19 (11) ◽  
pp. 1873-1873
Author(s):  
ANTONINO DEL POPOLO ◽  
ISMAIL SAFFET YEŞILYURT
Keyword(s):  
Dark Matter ◽  
Matter Density ◽  
Density Profiles ◽  
Dark Matter Density
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