Deciphering the Soliton-Halo Relation in Fuzzy Dark Matter
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915394336325632 |
|---|---|
| author | Liao, Pin-Yu Su, Guan-Ming Schive, Hsi-Yu Kunkel, Alexander Huang, Hsinhao Chiueh, Tzihong |
| author_facet | Liao, Pin-Yu Su, Guan-Ming Schive, Hsi-Yu Kunkel, Alexander Huang, Hsinhao Chiueh, Tzihong |
| contents | Soliton cores at the center of fuzzy dark matter (FDM) halos provide a promising way to distinguish FDM from other dark matter models. However, the relation between solitons and their host halos remains contentious. Here, we rigorously examine this soliton-halo relation (SHR) using a rich set of cosmological simulations across various FDM particle masses, halo masses, and redshifts. We explicitly demonstrate thermal equilibrium between solitons and surrounding halo granules, energy equipartition within halos, and an FDM concentration-mass-nonisothermality relation. For each FDM halo, we confirm that its density profile outside the central soliton matches a collisionless N-body simulation from the same initial condition, serving as stringent numerical convergence tests. Our refined SHR agrees well with virialized halos in simulations, with a $1σ$ deviation of less than $30\%$. These findings not only reaffirm the SHR proposed by Schive et al. (2014) but also offer a more comprehensive understanding that extends its applicability. The simulation code GAMER is accessible at https://github.com/gamer-project/gamer. A Python script for computing the theoretical SHR is available at https://github.com/calab-ntu/fdm-soliton-halo-relation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_09908 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Deciphering the Soliton-Halo Relation in Fuzzy Dark Matter Liao, Pin-Yu Su, Guan-Ming Schive, Hsi-Yu Kunkel, Alexander Huang, Hsinhao Chiueh, Tzihong Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Soliton cores at the center of fuzzy dark matter (FDM) halos provide a promising way to distinguish FDM from other dark matter models. However, the relation between solitons and their host halos remains contentious. Here, we rigorously examine this soliton-halo relation (SHR) using a rich set of cosmological simulations across various FDM particle masses, halo masses, and redshifts. We explicitly demonstrate thermal equilibrium between solitons and surrounding halo granules, energy equipartition within halos, and an FDM concentration-mass-nonisothermality relation. For each FDM halo, we confirm that its density profile outside the central soliton matches a collisionless N-body simulation from the same initial condition, serving as stringent numerical convergence tests. Our refined SHR agrees well with virialized halos in simulations, with a $1σ$ deviation of less than $30\%$. These findings not only reaffirm the SHR proposed by Schive et al. (2014) but also offer a more comprehensive understanding that extends its applicability. The simulation code GAMER is accessible at https://github.com/gamer-project/gamer. A Python script for computing the theoretical SHR is available at https://github.com/calab-ntu/fdm-soliton-halo-relation. |
| title | Deciphering the Soliton-Halo Relation in Fuzzy Dark Matter |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2412.09908 |