The excursion set approach, and an improved model for the multiplicity function


Del Popolo A.

ASTRONOMY & ASTROPHYSICS, cilt.448, ss.439-450, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 448 Konu: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1051/0004-6361:20053526
  • Dergi Adı: ASTRONOMY & ASTROPHYSICS
  • Sayfa Sayıları: ss.439-450

Özet

I compare numerical multiplicity function with the theoretical multiplicity function obtained by means of the excursion set model and an improved version of the barrier shape which implicitly takes account of total angular momentum acquired by the proto-structure during evolution and of a non-zero cosmological constant. I describe the better agreement of the multiplicity function obtained in this paper with simulations of other previous models. While the theoretical multiplicity function of the present paper is in agreement with high resolution N-body simulations, the comparison of the theoretical multiplicity function of the present paper with the theoretical multiplicity function of several authors shows some discrepancies: e.g., the maximum value of the multiplicity function from simulations at v similar to 1 is smaller, and its low mass tail is shallower when compared with the ST multiplicity function.