Cosmological Structure Formation and Soliton Phase Transition in Fuzzy Dark Matter with Axion Self-Interactions

Autor:	Mocz, Philip, Fialkov, Anastasia, Vogelsberger, Mark, Boylan-Kolchin, Michael, Chavanis, Pierre-Henri, Amin, Mustafa A., Bose, Sownak, Dome, Tibor, Hernquist, Lars, Lancaster, Lachlan, Notis, Matthew, Painter, Connor, Robles, Victor H., Zavala, Jesus
Rok vydání:	2023
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1093/mnras/stad694
Popis:	We investigate cosmological structure formation in Fuzzy Dark Matter (FDM) with an attractive self-interaction (SI) with numerical simulations. Such a SI would arise if the FDM boson were an ultra-light axion, which has a strong CP symmetry-breaking scale (decay constant). Although weak, the attractive SI may be strong enough to counteract the quantum 'pressure' and alter structure formation. We find in our simulations that the SI can enhance small-scale structure formation, and soliton cores above a critical mass undergo a phase transition, transforming from dilute to dense solitons. Comment: 10 pages, 3 figures, submitted to mnras
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2301.10266 Zobrazit plný text záznamu View this record from Arxiv