The effects of massive neutrinos on the linear point of the correlation function
| Autor: | Parimbelli, G., Anselmi, S., Viel, M., Carbone, C., Villaescusa-Navarro, F., Corasaniti, P. S., Rasera, Y., Sheth, R., Starkman, G. D., Zehavi, I. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | JCAP01(2021)009 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1475-7516/2021/01/009 |
| Popis: | 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. Comment: 26 pages, 7 figures, 3 tables |
| Databáze: | arXiv |
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