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物理学院“格致﹒创新”论坛第二十一期——Pau Amaro Seoane研究员

日期: 2018-08-24 点击: ...

应兰州大学物理学院与萃英学院的邀请,巴塞罗那自治大学Pau Amaro Seoane研究员来校访问并做客物理学院“格致﹒创新”论坛第二十一期,欢迎广大师生届时参加!

题目:Relativistic mergers of black hole binaries have (1) large, similar masses, (2) low spins and (3) are circular



Binaries of stellar-mass black holes are among the most interesting sources for ground-based detectors, and have constituted the first detections. In this talk I will show that there is a selection effect for ground-based detectors, which should predominantly observe binaries of black holes with (1) large, similar masses, (2) low spins and (3) low eccentricities. 'Hyperstellar' black holes (HSBs) (i.e. black holes with masses larger than the nominal 10 Msun are predicted to be principally observed with an associated low value for the spin, typically of a<0.5, regardless of the formation channel. Also, when two HSBs build a binary, each of the spin magnitudes is also low, and the detection is mostly of binary members with similar masses. To address the distribution of the eccentricities of HSB binaries in dense stellar systems, I have used a large suite of dedicated three-body scattering experiments that include binary-single interactions and long-lived hierarchical systems with a highly accurate integrator, including relativistic corrections up to O(1/c^5). The results show that most sources in the detector band mainly have nearly zero eccentricities.


After completion the Bachelor’s in Theoretical Physics (Particle Physics) in Spain, Pau Amaro Seoane moved to Heidelberg to do a PhD in Theoretical Astrophysics, more precisely on dense stellar systems and the cosmic growth of supermassive black holes. Later, he moved to the Max Planck Institute of Gravitational Physics in Potsdam (also called the 'Albert Einstein Institute', AEI) to work with the director, Prof. Dr. Bernard Schutz and Dr. Curt Cutler on General Relativity, in particularly on Gravitational Wave Astronomy.

During the time in Barcelona, with Ignasi Ribas and Jordi Miralda-Escudé, he worked on the formation and evolution of protoplanetary disks, which later led to the development of a hybrid algorithm to study the formation and evolution of protoplanetary disks. Then he received an offer from the AEI in Potsdam to be a Senior Scientist in 2008 and after successfully raising a significant amount of third-party funding (i.e. not from the Max Planck Society), he created his own Gravitational Wave Astronomy group at the AEI to host postdocs and PhD students.

In 2016 he got an offer to join the Institute of Space Studies located at the Campus of Universitat Autònoma de Barcelona thanks to a Ramón y Cajal fellowship. Their Gravitational Wave Astronomy Research and Technology group there has led the Spanish effort in the LISA Pathfinder mission and in the future LISA one. He is chair of the Extreme-Mass Ratio Inspiral Working Group of the LISA Consortium, along with Carlos Sopuerta.

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