【学术视频】2019年华中师大－中国科大宇宙学青年学术研讨会 | 扬州大学Daniele Gregoris

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图 | Daniele Gregoris

题   目：On the first G₁ stiff fluid spike solution in General Relativity

报告人：Daniele Gregoris

单   位：扬州大学

时   间：2019-04-27

地   点：华中师范大学

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报告提纲

• Astrophysical observations suggest that the Universe is dominated by bubbles of large voids surrounded by denser walls

• It has also been argued that some of the large scale observational anomalies may require the existence of non-linear structures in the early Universe

• For example, most galactic nuclei contain supermassive black holes which must have already existed by a redshift of~10. However, such enormous black holes could not have naturally formed so early within the conventional cosmological model, and there must have already existed large seed black holes well before galaxy formation(with these seeds subsequently growing through accretion)

• Intersecting spikes may present an interesting model for the formation of such non-linear structures in general relativty

• In future works we want to find solutions exhibiting spikes at late time

• Solutions close to FL may be of interest for researchers working on perturbation theory who require an exact solution to compare against.
  

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个人简介

Daniele Gregoris, post-doctoral, Work in Yangzhou, Jiangsu Province, China.

Education: 

(1) 2011-2014: Stockholm University, Sweden, PhD in Theoretical Physics

(2) 2009-2011: University of Rome La Sapienza, Italy, Theoretical Physics

(3) 2006-2009: Università di Trieste, Italy, Physics

 Research Interests:

(1) Applications of general relativity to cosmology and black hole physics

(2) New exact solutions to the Einstein equations: mathematical formalism and physical properties

(3) Gravitation physics

会议简介

2019年度华中师大－中国科大宇宙学青年学术研讨会于2019年4月26日-4月29日在武汉举办。为了促进相关领域青年学者的学术交流，特组织召开此次会议。本次会议以口头报告及墙报的形式研讨交流引力波时代下引力与宇宙学的相关课题，充分研讨交叉领域的研究现状、重要问题和未来发展方向，展示最新研究成果和进展，以及探讨如何推进我国青年学者在引力与宇宙学领域的进一步发展和科学合作。

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