scholarly journals Evolution of the Milky Way Halo by Accretion of Dwarf Satellite Galaxies

2011 ◽  
Vol 48 ◽  
pp. 415-417 ◽  
Author(s):  
M. Petrov ◽  
G. Hensler
Keyword(s):  
Milky Way ◽  
Satellite Galaxies ◽  
Milky Way Halo ◽  
Dwarf Satellite Galaxies

scholarly journals MULTI-ELEMENT ABUNDANCE MEASUREMENTS FROM MEDIUM-RESOLUTION SPECTRA. III. METALLICITY DISTRIBUTIONS OF MILKY WAY DWARF SATELLITE GALAXIES

2011 ◽  
Vol 727 (2) ◽  
pp. 78 ◽  
Author(s):  
Evan N. Kirby ◽  
Gustavo A. Lanfranchi ◽  
Joshua D. Simon ◽  
Judith G. Cohen ◽  
Puragra Guhathakurta
Keyword(s):  
Milky Way ◽  
Element Abundance ◽  
Medium Resolution ◽  
Satellite Galaxies ◽  
Dwarf Satellite Galaxies

scholarly journals Satellite galaxies as better tracers of the Milky Way halo mass

2019 ◽  
Vol 14 (S353) ◽  
pp. 109-112
Author(s):  
Jiaxin Han ◽  
Wenting Wang ◽  
Zhaozhou Li
Keyword(s):  
Dark Matter ◽  
Steady State ◽  
Phase Space ◽  
Milky Way ◽  
Space Structure ◽  
Space Distribution ◽  
Halo Stars ◽  
Satellite Galaxies ◽  
State Models ◽  
Milky Way Halo

AbstractThe inference of the Milky Way halo mass requires modelling the phase space structure of dynamical tracers, with different tracers following different models and having different levels of sensitivity to the halo mass. For steady-state models, deviations from steady-state in the tracer distribution lead to an irreducible stochastic bias. This bias is small for satellite galaxies and dark matter particles, but as large as a factor of 2 for halo stars. This is consistent with the picture that satellite galaxies closely trace the underlying phase space distribution of dark matter particles, while halo stars are less phase-mixed. As a result, the use of only ~100 satellite galaxies can achieve a significantly higher accuracy than that achievable with a much larger sample of halo stars.

scholarly journals MULTI-ELEMENT ABUNDANCE MEASUREMENTS FROM MEDIUM-RESOLUTION SPECTRA. II. CATALOG OF STARS IN MILKY WAY DWARF SATELLITE GALAXIES

2010 ◽  
Vol 191 (2) ◽  
pp. 352-375 ◽  
Author(s):  
Evan N. Kirby ◽  
Puragra Guhathakurta ◽  
Joshua D. Simon ◽  
Marla C. Geha ◽  
Constance M. Rockosi ◽  
...  
Keyword(s):  
Milky Way ◽  
Element Abundance ◽  
Medium Resolution ◽  
Satellite Galaxies ◽  
Dwarf Satellite Galaxies

scholarly journals FOLLOWING THE COSMIC EVOLUTION OF PRISTINE GAS. I. IMPLICATIONS FOR MILKY WAY HALO STARS

2016 ◽  
Vol 834 (1) ◽  
pp. 23 ◽  
Author(s):  
Richard Sarmento ◽  
Evan Scannapieco ◽  
Liubin Pan
Keyword(s):  
Milky Way ◽  
Halo Stars ◽  
Cosmic Evolution ◽  
Milky Way Halo

scholarly journals A comparative study of satellite galaxies in Milky Way-like galaxies from HSC, DECaLS, and SDSS

2020 ◽  
Vol 500 (3) ◽  
pp. 3776-3801
Author(s):  
Wenting Wang ◽  
Masahiro Takada ◽  
Xiangchong Li ◽  
Scott G Carlsten ◽  
Ting-Wen Lan ◽  
...  
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Statistical Study ◽  
Satellite System ◽  
Large Scatter ◽  
Local Universe ◽  
Good Representative ◽  
Luminosity Functions ◽  
Satellite Galaxies ◽  
Good Agreement

ABSTRACT We conduct a comprehensive and statistical study of the luminosity functions (LFs) for satellite galaxies, by counting photometric galaxies from HSC, DECaLS, and SDSS around isolated central galaxies (ICGs) and paired galaxies from the SDSS/DR7 spectroscopic sample. Results of different surveys show very good agreement. The satellite LFs can be measured down to MV ∼ −10, and for central primary galaxies as small as 8.5 < log10M*/M⊙ < 9.2 and 9.2 < log10M*/M⊙ < 9.9, which implies there are on average 3–8 satellites with MV < −10 around LMC-mass ICGs. The bright end cutoff of satellite LFs and the satellite abundance are both sensitive to the magnitude gap between the primary and its companions, indicating galaxy systems with larger magnitude gaps are on average hosted by less massive dark matter haloes. By selecting primaries with stellar mass similar to our Milky Way (MW), we discovered that (i) the averaged satellite LFs of ICGs with different magnitude gaps to their companions and of galaxy pairs with different colour or colour combinations all show steeper slopes than the MW satellite LF; (ii) there are on average more satellites with −15 < MV < −10 than those in our MW; (iii) there are on average 1.5 to 2.5 satellites with MV < −16 around ICGs, consistent with our MW; (iv) even after accounting for the large scatter predicted by numerical simulations, the MW satellite LF is uncommon at MV > −12. Hence, the MW and its satellite system are statistically atypical of our sample of MW-mass systems. In consequence, our MW is not a good representative of other MW-mass galaxies. Strong cosmological implications based on only MW satellites await additional discoveries of fainter satellites in extra-galactic systems. Interestingly, the MW satellite LF is typical among other MW-mass systems within 40 Mpc in the local Universe, perhaps implying the Local Volume is an underdense region.

Evidence of a Dwarf Galaxy Stream Populating the Inner Milky Way Halo

2021 ◽  
Vol 920 (1) ◽  
pp. 51
Author(s):  
Khyati Malhan ◽  
Zhen Yuan ◽  
Rodrigo A. Ibata ◽  
Anke Arentsen ◽  
Michele Bellazzini ◽  
...  
Keyword(s):  
Milky Way ◽  
Dwarf Galaxy ◽  
Milky Way Halo

scholarly journals Are there MACHOs in the Milky Way halo?

2002 ◽  
Vol 395 (1) ◽  
pp. 31-35 ◽  
Author(s):  
A. M. Green ◽  
K. Jedamzik
Keyword(s):  
Milky Way ◽  
Milky Way Halo

scholarly journals Dark matter–radiation interactions: the structure of Milky Way satellite galaxies

2016 ◽  
Vol 461 (3) ◽  
pp. 2282-2287 ◽  
Author(s):  
J. A. Schewtschenko ◽  
C. M. Baugh ◽  
R. J. Wilkinson ◽  
C. Bœhm ◽  
S. Pascoli ◽  
...  
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Satellite Galaxies
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