publication . Article . Preprint . 2013

the virialization density of peaks with general density profiles under spherical collapse

Rubin, Douglas; Loeb, Abraham;
Open Access
  • Published: 10 Dec 2013 Journal: Journal of Cosmology and Astroparticle Physics, volume 2,013, pages 19-19 (eissn: 1475-7516, Copyright policy)
  • Publisher: IOP Publishing
Abstract
We calculate the non-linear virialization density, $\Delta_c$, of halos under spherical collapse from peaks with an arbitrary initial and final density profile. This is in contrast to the standard calculation of $\Delta_c$ which assumes top-hat profiles. Given our formalism, the non-linear halo density can be calculated once the shape of the initial peak's density profile and the shape of the virialized halo's profile are provided. We solve for $\Delta_c$ for halos in an Einstein de-Sitter and $\Lambda$CDM universe. As examples, we consider power-law initial profiles as well as spherically averaged peak profiles calculated from the statistics of a Gaussian rando...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Galaxy Astrophysics
free text keywords: Astronomy and Astrophysics, Halo, Universe, media_common.quotation_subject, media_common, Randomness, Astrophysics, Galaxy formation and evolution, Galaxy cluster, Halo mass function, Gaussian random field, Dark matter, Physics, Classical mechanics, Astrophysics - Cosmology and Nongalactic Astrophysics

[1] Bond J. R., Cole S., Efstathiou G., Kaiser N., 1991, ApJ, 379, 440

[2] Sheth R. K., Mo H. J., Tormen G., 2001, MNRAS, 323, 1

[3] Sheth R. K., Tormen G., 2002, MNRAS, 329, 61

[4] Sheth R. K., Tormen G., 1999, MNRAS, 308, 119

[5] Jenkins A., Frenk C. S., White S. D. M., Colberg J. M., Cole S., Evrard A. E., Couchman H. M. P., Yoshida N., 2001, MNRAS, 321, 372

[6] Springel V., et al., 2005, Natur, 435, 629

[7] Warren M. S., Abazajian K., Holz D. E., Teodoro L., 2006, ApJ, 646, 881

[8] Reed D. S., Bower R., Frenk C. S., Jenkins A., Theuns T., 2007, MNRAS, 374, 2

[9] Tinker J., Kravtsov A. V., Klypin A., Abazajian K., Warren M., Yepes G., Gottlober S., Holz D. E., 2008, ApJ, 688, 709

[10] Crocce M., Fosalba P., Castander F. J., Gaztan~aga E., 2010, MNRAS, 403, 1353

[11] Angulo R. E., Springel V., White S. D. M., Jenkins A., Baugh C. M., Frenk C. S., 2012, MNRAS, 426, 2046

[12] Davis M., Efstathiou G., Frenk C. S., White S. D. M., 1985, ApJ, 292, 371

Powered by OpenAIRE Open Research Graph
Any information missing or wrong?Report an Issue
publication . Article . Preprint . 2013

the virialization density of peaks with general density profiles under spherical collapse

Rubin, Douglas; Loeb, Abraham;