Modified Gravity and Ultralight Dark Matter
Speaker: Yunlong Zhang（张云龙）
Affiliation: National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台)
Time: 14:00-15:00, Tuesday, 13th January, 2026 (UTC+8, Beijing Time)
Venue:Room 1502, Shing-Tung Yau Center, Yifu Architecture Building, Sipailou Campus of Southeast University, Nanjing (东南大学四牌楼校区逸夫建筑馆丘成桐中心1502室)
Inviter: Jianfei Xu (许剑飞)
Abstract
In this talk, I will introduce several ultralight dark matter models based on modified gravity, along with their parameter constraints from astronomical observations. Topics include the cosmological constraints on apparent dark matter derived from the holographic FRW universe, the pulsar timing residuals induced by spin-2 ultralight dark matter in bimetric gravity, and the gravitational wave effects of axion-like dark matter in Chern–Simons modified gravity.
Speaker
Yunlong Zhang（张云龙）
National Astronomical Observatories, Chinese Academy of Sciences
张云龙，中国科学院国家天文台引力波天体物理团组研究员。2009年获兰州大学理学学士学位，2014年获中科院理论物理所理学博士学位。先后在台湾大学和韩国亚太理论物理中心从事博士后研究。2018年任京都大学汤川基础物理所特任助理教授，2020入职国家天文台。主要从事引力理论方面的研究，包括黑洞物理和引力波、流体动力学和超轻暗物质等。
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东南大学丘成桐中心
Shing-Tung Yau Center of Southeast University
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