dc.contributor.author | Bruni, Marco | |
dc.contributor.author | Crittenden, Robert | |
dc.contributor.author | Maartens, Roy | |
dc.date.accessioned | 2023-06-02T10:17:34Z | |
dc.date.available | 2023-06-02T10:17:34Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Bruni, M. et al. (2012). Disentangling non-gaussianity, bias, and general relativistic effects in the galaxy distribution. Physical Review D, 85 (4). https://doi.org/10.1103/PhysRevD.85.041301 | en_US |
dc.identifier.issn | 1550-2368 | |
dc.identifier.uri | https://doi.org/10.1103/PhysRevD.85.041301 | |
dc.identifier.uri | http://hdl.handle.net/10566/8998 | |
dc.description.abstract | Local non-Gaussianity, parametrized by
f
NL
, introduces a scale-dependent bias that is strongest at large scales, precisely where general relativistic (GR) effects also become significant. With future data, it should be possible to constrain
f
NL
=
O
(
1
)
with high redshift surveys. GR corrections to the power spectrum and ambiguities in the gauge used to define bias introduce effects similar to
f
NL
=
O
(
1
)
, so it is essential to disentangle these effects. For the first time in studies of primordial non-Gaussianity, we include the consistent GR calculation of galaxy power spectra, highlighting the importance of a proper definition of bias. We present observable power spectra with and without GR corrections, showing that an incorrect definition of bias can mimic non-Gaussianity. However, these effects can be distinguished by their different redshift and scale dependence, so as to extract the true primordial non-Gaussianity. | en_US |
dc.language.iso | en | en_US |
dc.publisher | American Physical Society | en_US |
dc.subject | Physics | en_US |
dc.subject | Astronomy | en_US |
dc.subject | Cosmology | en_US |
dc.subject | Gravitation | en_US |
dc.subject | Galaxies | en_US |
dc.title | Disentangling non-gaussianity, bias, and general relativistic effects in the galaxy distribution | en_US |
dc.type | Article | en_US |