View : 488 Download: 178
Signature of primordial non-Gaussianity of 3 type in the mass function and bias of dark matter haloes
- Title
- Signature of primordial non-Gaussianity of 3 type in the mass function and bias of dark matter haloes
- Authors
- Desjacques V.; Seljak U.
- Ewha Authors
- Uros Seljak
- SCOPUS Author ID
- Uros Seljak
- Issue Date
- 2010
- Journal Title
- Physical Review D - Particles, Fields, Gravitation and Cosmology
- ISSN
- 1550-7998
- Citation
- Physical Review D - Particles, Fields, Gravitation and Cosmology vol. 81, no. 2
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- Abstract
- We explore the effect of a cubic correction gNL 3 on the mass function and bias of dark matter haloes extracted from a series of large N-body simulations and compare it to theoretical predictions. Such cubic terms can be motivated in scenarios like the curvaton model, in which a large cubic correction can be produced while simultaneously keeping the quadratic fNL 2 correction small. The deviation from the Gaussian halo mass function is in reasonable agreement with the theoretical predictions. The scale-dependent bias correction Δbκ(k,gNL) measured from the auto- and cross-power spectrum of haloes, is similar to the correction in fNL models, but the amplitude is lower than theoretical expectations. Using the compilation of LSS data in, we obtain for the first time a limit on gNL of -3.5×105<gNL<+8.2×105 (at 95% CL). This limit will improve with the future LSS data by 1-2 orders of magnitude, which should test many of the scenarios of this type. © 2010 The American Physical Society.
- DOI
- 10.1103/PhysRevD.81.023006
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
- Files in This Item:
-
Signature of primordial non-Gaussianity of 3 type in the mass function and bias of dark matter haloes.pdf(900.92 kB)
Download
- Export
- RIS (EndNote)
- XLS (Excel)
- XML