The accreted stellar halo as a window on halo assembly in L* galaxies

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Stellar Halo Constraints on Simulated Late Type Galaxies

How do late type spiral galaxies form within the context of a CDM cosmology? We contrast N-body, smoothed particle hydrodynamical simulations of galaxy formation which employ two different supernova feedback mechanisms. Observed mass and metallicity distributions of the stellar halos of the Milky Way and M31 provide constraints on these models. A strong feedback model, incorporating an adiabati...

متن کامل

The influence of halo assembly on galaxies and galaxy groups

We study the variations of group galaxy properties according to their assembly history in groups identified in the SDSS-DR6 (hereafter SDSS) catalogue. Using mock SDSS group catalogues, we find that the isolation and concentration of a galaxy group are good observational discriminators of group assembly. However, analysing the mean spectral type of SDSS groups as a function of concentration and...

متن کامل

Cosmology and the Stellar Halo

If the favored hierarchical cosmological model is correct, then the Milky Way system should have accreted and subsequently tidally destroyed ∼ 100 low-mass galaxies in the past ∼ 12Gyr. We model this process using a hybrid semi-analytic plus N-body approach and show that the disrupted systems lead naturally to stellar halos with masses and density profiles much like the stellar halo of our own ...

متن کامل

Bar-halo Friction in Galaxies Iii: Halo Density Changes

The dark matter halos of bright galaxies appear to have densities in their inner parts that are at least an order of magnitude lower than predicted from structure-formation simulations. This well-known difficulty for LCDM would be ameliorated if galaxy evolution could drive down the dark matter density in the inner halo. Here I present a study of the halo density reductions that result from tor...

متن کامل

Cosmic stellar relics in the Galactic halo

We study the stellar population history and chemical evolution of the Milky Way in a hierarchical ΛCDM model for structure formation. Using a Monte Carlo method based on the semi-analytical extended Press & Schechter formalism, we develop a new code GAMETE (GAlaxy MErger Tree & Evolution) to reconstruct the merger tree of the Galaxy and follow the evolution of gas and stars along the hierarchic...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters

سال: 2017

ISSN: 1745-3925,1745-3933

DOI: 10.1093/mnrasl/slx044