You are here

Extreme mass ratio inspiral

Working Groups

Extreme Mass Ratio Inspirals

A high number of cycles in very close orbit to the supermassive black hole horizon

Impression of an Extreme Mass Ratio Inspiral. Credit: NASA

Looking at the gravitational wave signals of stellar compact objects slowly falling into supermassive black holes.

The working group reports progress on the study of Extreme Mass Ratio Inspirals (EMRIs) to and gives recommendations to the LISA consortium. EMRIs are high precision tools for Gravitational Wave Astronomy consisting of a stellar compact object inspiraling into a supermassive black hole located in a galactic center. A key feature of these systems is that the stellar compact object spends a high number of cycles (of the order of hundred thousand) orbiting very close to the supermassive black hole horizon. As a consequence, the gravitational waves emitted during the inspiral are complex signals that encode very precise information about strong relativistic effects and the geometry of the supermassive black hole.

The main tasks of the WG are: To keep up to date with research relevant for EMRI modelling, astrophysical formation channels and event rates, the construction of families of waveform templates for data analysis and parameter estimation, and all kinds of scientific exploitation of these signals. The WG also coordinates different institutions and people working in this subject to carry out EMRI studies to assess the capabilities of LISA to observe these systems and the scientific potential of these observations.

We intend to convene regularly, in particular before or after LISA Consortium Meetings, and to coordinate activities and exchange information through the wiki inside the LISA Consortium Website.

The EMRI WG is open to all the researchers and institutions – both inside Europe and overseas – who are interested in pursuing research of relevance for EMRIs in the scientific context of LISA as described in the white paper “The Gravitational Universe”.

All interested scientists are welcome to join the working group by applying to the consortium and then for WG membership. Once you are a registered scientist, you can go to your account and use the Apply for Working Group button at the top to access the list of available WGs.

External links