MG14 - Talk detail |
Participant |
Pisani, Alice | |||||||
Institution |
CPPM (Marseille) and IAP(Paris) - 163, avenue de Luminy - Marseille - Provence - France | |||||||
Session |
DE3 |
Accepted |
Yes |
Order |
3 |
Time |
15:15 | 15' |
Talk |
Oral abstract |
Title |
Precision Cosmology With Cosmic Voids | |||||
Coauthors | Pisani, Alice | |||||||
Abstract |
Modern surveys allow us to access to high quality measurements, by sampling the galaxy distribution in detail also in the emptier regions, voids. Cosmic voids present themselves as a new tool to constrain cosmology. While the treatment of systematics might be simpler in these empty regions, with the aim of achieving the level of precision cosmology a careful modeling of such effects is necessary. In particular, peculiar velocities affect the way we observe cosmic voids, and thus their effect needs to be understood. Using mock catalogues, I analyze the effect of peculiar velocities on void properties. In this talk, I first describe the use of voids as cosmological tools. I then present the results of the analysis of the systematic effects affecting voids and discuss it in the framework of current and future surveys. Additionally, I present a forecast for void abundances with the future Euclid and WFIRST missions and obtain, using the Fisher matrix formalism, a prediction for the constraints that voids will set on cosmological parameters. |
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Pdf file |
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Session |
DE1 |
Accepted |
Yes |
Order |
4 |
Time |
15:35 | 15' |
Talk |
Oral abstract |
Title |
Constraining Dark Energy With Cosmic Voids | |||||
Coauthors | Pisani, Alice | |||||||
Abstract |
Modern surveys allow us to access to high quality measurements, by sampling the galaxy distribution in detail also in the emptier regions, voids. Cosmic voids present themselves as a new tool to constrain cosmology. While the treatment of systematics might be simpler in these empty regions, with the aim of achieving the level of precision cosmology a careful modeling of such effects is necessary. In particular, peculiar velocities affect the way we observe cosmic voids, and thus their effect needs to be understood. Using mock catalogues, I analyze the effect of peculiar velocities on void properties. In this talk, I first describe the use of voids as cosmological tools. I then present the results of the analysis of the systematic effects affecting voids and discuss it in the framework of current and future surveys. Finally, I present a forecast for void abundances with the future Euclid and WFIRST missions and obtain, using the Fisher matrix formalism, a prediction for the constraints that voids will set on the dark energy equation of state. |
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Pdf file |
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