Activity Report for WG3 (Gravitational Physics), NewCompStar 2014

A significant activity for WG3 in 2014 was the appointment of four Topic Leaders.  These were Bruno Giacomazzo (Trento, Italy), with topic “numerical modelling of binary inspiral”; Tanja Hinderer (Albert Einstein Institute, Golm, Germany), with topic “Influence of EoS on gravitational wave signals from inspiral”; Andreas Bauswein (Thessaloniki, Greece), with topic “Binary inspiral electromagnetic counterparts/ejecta”; and Leonardo Gualtieri (Rome, Italy), with topic “Gravitational wave emission from individual stars”.

The first opportunity for scientific interaction came in the main 2014 NewCompStar meeting in  March, held in Florence.  Participants included topics leaders and synergy agents, and also some gravitational wave expertise from outside of Europe (there were invited speakers with particular expertise in gravitational physics from both the US and Australia).  In addition to this, a dedicated Working Group meeting was held in Lyon in November.  This was held jointly between Working Group 2 (nuclear physics) and Working Group 3 (gravitational physics), with a whole day being dedicated to each.  On the WG3-focused day, the Working Group Leader gave an overview of the scientific remit of the group, and of the general COST framework.  The four Topic Leaders then gave review talks of their respective areas.  These were followed by a number of other more specialised talks, and a round-table type discussion on how best to use future Working Group meetings.  It was agreed that that having the two WG meeting, one after the other, was  a very good arrangement, as it enabled many people to stay for both the WG2-focused and the WG3-focused days, promoting a dialogue between the two sets of experts.  The arrangement was also commented upon favourably by the Synergy Agents that attended, particularly as it made it easier for the WG2-WG3 Synergy Agent to ensure a proper dialogue was taking place between the two Working Groups.

In terms of STSMs, there were four with an almost entirely gravity-related theme, and many more where gravity played an important role.  In terms of publications, there were many with a significant gravity-component that acknowledged NewCompStar, include some from the gravitational wave detection community, particularly welcome given the expectation that 2015 will be an important year for gravitational wave astronomy, as we look ahead to Advanced LIGO starting operations in late 2015.

Working Group Leader: D I Jones (Southampton)