Add to Calendar 2024-11-26T10:00:00 2024-11-26T11:00:00 Long-duration transient gravitational waves from newborn neutron stars and glitching pulsars Event Information:   Abstract:  All gravitational waves detected so far have been seconds-scale transients from compact binary coalescences. At the other extreme, a long-standing science target of ground-based interferometric detectors are years-long continuous waves from spinning, deformed neutron stars. Between these regimes, a rich variety of long-duration transient signals could be within the reach of LIGO-Virgo-KAGRA or future detectors. The richest zoo of such signals is again provided by neutron stars, promising rich multi-messenger studies that probe both the overall structure and the dynamics of these extremely dense objects. This seminar will cover the physics and detection methods for the two most promising scenarios: (1) highly deformed neutron stars just after theirbirth in core-collapse supernovae or binary mergers, and (2) emission triggered by pulsar glitches, the enigmatic spin-up events observed in the radio, X-ray and gamma-ray bands. Bio:  David Keitel, as a member of the LIGO Scientific Collaboration (LSC) since 2011 and the GRAVITY group at UIB since 2020, focuses his research on gravitational waves (GWs) from neutron stars and black holes. His work covers large-scale data analysis and the modelling and interpretation of astrophysical GW sources. DK studied physics and astronomy in Bonn, Germany with a semester at Stony Brook, NY and graduated with a diploma thesis (master's equivalent) on statistical methods for weak gravitational lensing in 2010. He obtained his doctorate from Leibniz University Hannover, Germany in 2014 for work at the Albert Einstein Institute (AEI) on searches for continuous waves (CWs) from spinning neutron stars and a concept for space-based GW detection.   Learn More: Read Dr. Keitel's faculty page from the Universitat de les Illes Balears: Dr David Benjamin Keitel - Personnel file - UIB - Universitat de les Illes Balears Event Location: HENN 318

Add to Calendar 2024-11-27T10:00:00 2024-11-27T11:00:00 Searching for continuous gravitational waves from unknown neutron stars in binary systems Event Information:   Abstract:  Unknown neutron stars in binary systems might be one of the best sources of continuous gravitational waves (yet to be detected), due to their millisecond rotation rates and the  accretion from their companion that can source the required asymmetry. However, searching for these signals poses significant computational challenges due to the extensive number of unknown parameters and the substantial amount of data required to achieve detectable signal-to-noise ratios. In this talk I will review the different search results up to date and discuss recent advancements in data analysis techniques that improve the efficiency and sensitivity of these searches.   Learn More: Article: More computing power to search for continuous gravitational waves, Max Planck Institute for Gravitational Physics Dr. Pep Blai Covas Vidal's contact page: Dr. Pep Blai Covas Vidal (mpg.de) and CV. Event Location: HENN 318