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4 papers · 2 filters
Massive black hole seeds from low angular momentum material
S. M. Koushiappas, J. S. Bullock, A. Dekel
(ABRIDGED) We present a model in which the seeds of supermassive black holes form from the lowest angular momentum gas in proto-galaxies at high redshift. We show that this leads t…
Scaling Relations of Local Spiral Galaxies.I. Observational Foundations
Stephane Courteau, Lauren A. MacArthur, Avishai Dekel +3
(Abridged) This paper presents an exploration of two fundamental scaling relations of spiral galaxies, the luminosity-rotation speed (or Tully-Fisher; TF) relation, and the size-lu…
Photo-evaporation by thermal winds in dwarf galaxies
Nir J. Shaviv, Avishai Dekel
We revisit the evaporation process of gas from dwarf galaxies after it has been photo-ionized by the UV flux from the first stars and AGNs and heated to T~10^4K or 2x10^4K respecti…
Virial shocks in galactic haloes?
Yuval Birnboim, Avishai Dekel
We investigate the conditions for the existence of an expanding virial shock in the gas falling within a spherical dark-matter halo. The shock relies on pressure support by the sho…