تقرير
First measurement of the correlation between cosmic voids and the Lyman-$\alpha$ forest
| العنوان: | First measurement of the correlation between cosmic voids and the Lyman-$\alpha$ forest |
|---|---|
| المؤلفون: | Ravoux, Corentin, Armengaud, Eric, Bautista, Julian, Goff, Jean-Marc Le, Palanque-Delabrouille, Nathalie, Rich, James, Walther, Michael, Yèche, Christophe |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We report the first detection of large-scale matter flows around cosmic voids at a median redshift z = 2.49. Voids are identified within a tomographic map of the large-scale matter density built from eBOSS Lyman-$\alpha$ (Lya) forests in SDSS Stripe 82. We measure the imprint of flows around voids, known as redshift-space distortions (RSD), with a statistical significance of 10 $\sigma$. The observed quadrupole of the void-forest cross-correlation is described by a linear RSD model. The derived RSD parameter is $\beta = 0.52 \pm 0.05$. Our model accounts for the tomographic effect induced by the Lya data being located along parallel quasar lines of sight. This work paves the way towards growth-rate measurements at redshifts currently inaccessible to galaxy surveys. Comment: 5 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2203.11045 |
| رقم الأكسشن: | edsarx.2203.11045 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |