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The effects of massive neutrinos on the linear point of the correlation function

Parimbelli G.
•
Anselmi S.
•
Viel M.
altro
Zehavi I.
2021
  • journal article

Periodico
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Abstract
The linear point (LP), defined as the mid-point between the dip and the peak of the two-point clustering correlation function (TPCF), has been shown to be an excellent standard ruler for cosmology. In fact, it is nearly redshift-independent, being weakly sensitive to non-linearities, scale-dependent halo bias and redshift-space distortions. So far, these findings were tested assuming that neutrinos are massless; in this paper we extend the analysis to massive-neutrino cosmologies. In particular, we examine if the scale-dependent growth induced by neutrinos affects the LP position and if it is possible to detect the neutrino masses using the shift of the LP compared to the massless-neutrino case. For our purposes, we employ two sets of state-of-the-art N-body simulations with massive neutrinos. For each of them we measure the TPCF of cold dark matter (CDM) and halos and, to estimate the LP, fit the TPCF with a model-independent parametric fit in the range of scales of the Baryon Acoustic Oscillations (BAO). Overall, we find that the LP retains its features as a standard ruler even when neutrinos are massive. The cosmic distances measured with the LP can therefore be employed to constrain the neutrino mass.
DOI
10.1088/1475-7516/2021/01/009
WOS
WOS:000620675000009
Archivio
http://hdl.handle.net/20.500.11767/126251
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85099364858
https://arxiv.org/abs/2007.10345
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Soggetti
  • Galaxy clustering

  • Neutrino masses from ...

  • Settore FIS/05 - Astr...

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