BROWSE

Related Scientist

Jiajun, Zhang's photo.

Jiajun, Zhang
순수물리이론 연구단
more info

ITEM VIEW & DOWNLOAD

Dark matter haloes in interacting dark energy models: Formation history, density profile, spin, and shape

Cited 0 time in webofscience Cited 0 time in scopus
30 Viewed 0 Downloaded
Title
Dark matter haloes in interacting dark energy models: Formation history, density profile, spin, and shape
Author(s)
Yun Liu; Shihong Liao; Xiangkun Liu; Jiajun Zhang; Rui An; Zuhui Fan
Publication Date
2022-04-01
Journal
Monthly Notices of the Royal Astronomical Society, v.511, no.2, pp.3076 - 3088
Publisher
Oxford University Press
Abstract
© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.The interacting dark energy (IDE) model, which considers the interaction between dark energy and dark matter, provides a natural mechanism to alleviate the coincidence problem and can also relieve the observational tensions under the ΛCDM model. Previous studies have put constraints on IDE models by observations of cosmic expansion history, cosmic microwave background, and large-scale structures. However, these data are not yet enough to distinguish IDE models from ΛCDM effectively. Because the non-linear structure formation contains rich cosmological information, it can provide additional means to differentiate alternative models. In this paper, based on a set of N-body simulations for IDE models, we investigate the formation histories and properties of dark matter haloes and compare with their ΛCDM counterparts. For the model with dark matter decaying into dark energy and the parameters being the best-fitting values from previous constraints, the structure formation is markedly slowed down, and the haloes have systematically lower mass, looser internal structure, higher spin, and anisotropy. This is inconsistent with the observed structure formation, and thus this model can be safely ruled out from the perspective of non-linear structure formation. Moreover, we find that the ratio of halo concentrations between IDE and ΛCDM counterparts depends sensitively on the interaction parameter and is independent of halo mass. This can act as a powerful probe to constrain IDE models. Our results concretely demonstrate that the interaction of the two dark components can affect the halo formation considerably, and therefore the constraints from non-linear structures are indispensable.
URI
https://pr.ibs.re.kr/handle/8788114/11301
DOI
10.1093/mnras/stac229
ISSN
0035-8711
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse