Gravitational Lensing Effect on the Two-Point Correlation Function of Hot Spots in 21 cm fluctuations
| dc.creator | Tashiro, H. | |
| dc.creator | Futamase, T. | |
| dc.date | 2009-01-15 | |
| dc.date.accessioned | 2026-07-07T12:32:02Z | |
| dc.date.available | 2026-07-07T12:32:02Z | |
| dc.description | We investigate the weak gravitational lensing effect on the two-point correlation function of local maxima (hot spots) in the cosmic 21 cm fluctuation map. The intrinsic two-point function has a pronounced depression feature around the angular scale of $θ\sim 40$ arcmin, which depends on the observed frequency and corresponds to the scale of the acoustic oscillation of cosmic plasma before the recombination. It is found that the weak lensing induces a large w-dependent smoothing at that scale where w is the equation of state parameter of dark energy and thus provides a useful constraints on the dark energy property combined with the depression angular scales on the two-point correlation function. | |
| dc.description | 7 pages, submitted to MNRAS | |
| dc.identifier | https://arxiv.org/abs/0901.2230 | |
| dc.identifier | http://arxiv.org/abs/0901.2230 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/216649 | |
| dc.subject | Cosmology and Nongalactic Astrophysics | |
| dc.title | Gravitational Lensing Effect on the Two-Point Correlation Function of Hot Spots in 21 cm fluctuations | |
| dc.type | text |