应6163银河net163am刘玉孝教授和杨捷副教授邀请，巴塞罗那自治大学Pau Amaro Seoane研究员来我院访问，并做学术报告，欢迎广大师生届时参加！
题目：Detecting intermediate-mass ratio inspirals from the ground and space
The detection of a gravitational capture of a stellar-mass compact object by a massive black hole (MBH) will allow us to test gravity in the strong regime. These sources form via two-body relaxation, by exchanging energy and angular momentum, and inspiral in a slow, progressive way down to the final merger. I will show that, depending on their orbital parameters, in globular clusters intermediate-mass ratios (IMRIs) of MBH of masses between a hundred and a few thousand have frequencies that make them detectable (i) with ground-based observatories, or (ii) with both LISA and ground-based ones such as advanced LIGO/Virgo and third generation ones, with ET as an example. The binaries have a signal-to-noise ratio large enough to ensure detection. More extreme values in their orbital parameters correspond to systems detectable only with ground-based detectors and enter the LIGO/Virgo band in particular in many different harmonics for masses up to some 2000 Msun. I show that environmental effects are negligible, so that the source should not have this kind of complication. The accumulated phase-shift is measurable with LISA and ET, and for some cases also with LIGO, so that it is possible to recover information about the eccentricity and formation scenario. For IMRIs with a total mass < ~ 2000 msun and initial eccentricities up to 0.999, lisa can give a warning to ground-based detectors with enough time in advance and seconds of precision. the possibility of detecting imris from the ground alone or combined with space-borne observatories opens new possibilities for gravitational wave astronomy.
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.
