The mass function of spiral galaxy haloes
نویسندگان
چکیده
منابع مشابه
The mass function of dark matter haloes
We combine data from a number of N-body simulations to predict the abundance of dark haloes in cold dark matter (CDM) universes over more than four orders of magnitude in mass. A comparison of different simulations suggests that the dominant uncertainty in our results is systematic and is smaller than 10±30 per cent at all masses, depending on the halo definition used. In particular, our `Hubbl...
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Owing to the fact that the near future should see a rapidly expanding set of probes of the halo masses of individual early-type galaxies, we introduce a convenient parameter for characterizing the halo masses from both observational and theoretical results: ∇ Υ , the logarithmic radial gradient of the mass-to-light ratio. Using halo density profiles from -cold dark matter (CDM) simulations, we ...
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We use a high resolution ΛCDM numerical simulation to calculate the mass function of dark matter haloes down to the scale of dwarf galaxies, back to a redshift of fifteen. The Sheth and Tormen mass function provides an excellent match to all of our data except for redshifts of ten and higher, where it overpredicts halo numbers increasingly with redshift, reaching roughly 50 percent by redshift ...
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We use N-body simulations to examine the eeects of mass outtows on the density prooles of cold dark matter (CDM) haloes surrounding dwarf galaxies. In particular, we investigate the consequences of supernova-driven winds that expel a large fraction of the baryonic component from a dwarf galaxy disk after a vigorous episode of star formation. We show that this sudden loss of mass leads to the fo...
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We compute the baryonic mass function, ψ S (Mb)dlogMb, of disc galaxies using the luminosity functions and baryonic mass-to-light ratios reliable for this goal. On scales from 108M⊙ to 10 11M⊙ this function is featureless, ψ S ∝ M −1/2 b . Outside this mass range ψS is a strong inverse function of Mb. The contributions to the baryon density Ω S b from objects of different mass indicate that spi...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1993
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/260.3.610