Title: The role of AGN accretion disks in the formation of characteristic, low-frequency GW sources Accretion disks in active galactic nuclei (AGN) can enhance the formation of gravitational wave (GW) sources via the interaction of embedded stars and BHs with the surrounding gas. This can produce a substantial population of ‘gas-embedded’ GW sources across a range … Continue reading "CRA Seminar: Andrea Derdzinski (U. of Zurich)"
Title: Searches for gravitational-waves beyond compact binary coalescences Abstract: The Advanced LIGO and Virgo detectors have now completed three observing runs, and reported dozens of detections form compact binary mergers. As we observe more of the gravitational-wave universe, we may detect signals from novel sources. For example, core-collapse supernovae or cosmic string cusps may produce … Continue reading "CRA Seminar: Meg Millhouse (GaTech)"
Title: Multiscale Simulations of Star Formation from Molecular Clouds Abstract: Star formation lies at the center of many fundamental topics in astrophysics. No comprehensive, quantitative theory of star formation has been established due to the complex physics involved and the huge dynamic range of the problem. Using a series of MHD simulations of star formation … Continue reading "CRA Seminar: ChongChong He (U. of Maryland)"
Title: Hydrodynamical Evolution of Binary Black Holes Embedded in AGN Disks Abstract: Stellar-mass binary black holes (BBHs) embedded in active galactic nucleus (AGN) disks are promising progenitors of black hole mergers detected in gravitational waves (GW) by LIGO-VIRGO-KAGRA. Current observed mergers show distinct properties that may only be explained by this AGN channel, with a … Continue reading "CRA Seminar: Rixin Li (Cornell)"
Title: Neutrino astronomy with IceCube Connecting Photoelectrons to Supermassive Black Holes Abstract: The IceCube Neutrino Observatory, deployed beneath the South Pole, is the largest optical neutrino telescope in the World. IceCube has been studying a diffuse flux of high-energy (>TeV) astrophysical neutrinos, ever since it reported the first evidence in 2013. However, the sources of … Continue reading "CRA Seminar: Hans Niederhausen"
Title: High accuracy waveform models for high precision gravitational wave astronomy Abstract: Characterization of gravitational wave (GW) signals from the merger of binary black holes (BBHs) heavily rely on accurate gravitational waveform models. The most accurate way to compute waveforms is by solving the Einstein equation directly. This can only be done numerically (e.g. numerical … Continue reading "CRA Seminar: Tousif Islam (UMass-Dartmouth)"
Title: Glitches get stitches: The effect non-transient noise in LIGO detectors on astrophysical inference, and what to do about it Abstract: Ground-based gravitational-wave detector networks have detected a deluge of compact-binary events in the years since the original 2015 detection. Far more often than these events (approximately every two minutes), detectors experience transient, non-gaussian noise … Continue reading "CRA Seminar: Sophie Hourihane (Caltech)"
Title: Hunting extragalactic tau neutrinos in mountains, canyons, and volcanoes Abstract: The IceCube neutrino observatory discovered a high energy astrophysical neutrino flux extending to ~10PeV in energy. A first generation extragalactic neutrino telescope, IceCube gave us a taste of mulitmessenger astronomy with several reported hints thus far. An upcoming generation of telescopes is in the works, … Continue reading "CRA Seminar: Ibrahim Safa (Columbia)"
Title: Studying neutrino mass and dark matter, the key factors of the Universe structure formation Abstract: The formation of the structure of the Universe observed today is largely determined by the mass of its components. We know that ordinary visible matter makes up only about 20% of the total mass of the Universe. The rest … Continue reading "CRA Seminar: Mariia Fedkevych"
