Dark matter and galaxy cross-correlations with the Cherenkov Telescope Array Observatory
The Cherenkov Telescope Array Observatory (CTAO) will be a ground-based Cherenkov telescope performing wide-sky surveys, ideal for anisotropy studies such as cross-correlations with tracers of the cosmic large-scale structure. Cross-correlations can shed light on high-energy $\ensuremath{\gamma}$-ray sources and potentially reveal exotic signals from particle dark matter. In this work, we investigate CTAO sensitivity to cross-correlation signals between $\ensuremath{\gamma}$-ray emission and galaxy distributions. We find that by using dense, low-redshift catalogs like 2 MASS, and for integration times around 50 hours, this technique achieves sensitivities to both annihilating and decaying dark matter signals that are competitive with those from dwarf galaxy and cluster analyses.
Authors
- N. Fornengo (ORCID: https://orcid.org/0000-0002-3074-3118)
- Elena Pinetti (ORCID: https://orcid.org/0000-0001-7070-0094)
- S. Camera (ORCID: https://orcid.org/0000-0003-3399-3574)
- Aurelio Amerio (ORCID: https://orcid.org/0000-0001-9083-0910)
- Veronika Vodeb
- A. Cuoco (ORCID: https://orcid.org/0000-0003-1504-894X)
- G. Zaharijaš (ORCID: https://orcid.org/0000-0001-8484-7791)
Institutions
- Fermi National Accelerator Laboratory (US)
- Perimeter Institute (CA)
- University of Nova Gorica (SI)
- University of Chicago (US)
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino (IT)
- Instituto de Física Corpuscular (ES)
- Osservatorio Astrofisico di Torino (IT)
- Flatiron Health (United States) (US)
- Flatiron Institute (US)
- University of Turin (IT)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2025-10-29
- DOI
- https://doi.org/10.1103/1xtk-hf1s
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00