Could there be an undetected inner planet near the stability limit in Kepler-1647?   Abstract: Kepler-1647b  is  the  most  recently  discovered  planet  that  transits  two  stars,  e.g.,  a  circumbinary planet (CBP). Due to its large orbital separation, Kepler-1647b stands out from the rest of the Kepler CBPs, which mostly reside on much tighter orbits near … Continue reading "CRA Cosmic Coffee: Ziqian Hong"

Title/Abstract: TBA

Title: Gravitational Waves: Using Merger to Understand Ringdown   Abstract: With the advent of gravitational wave astronomy, we have newly found access to a wealth of knowledge in the form of gravitational waves. Scientists are working hard to extract as much information as possible from each of the ten binary black hole coalescences (and one … Continue reading "CRA Cosmic Coffee: Deborah Ferguson"

Title: Intermittent AGN feedback in galaxy clusters driven by cold gas accretion Abstract: Recent observations of cool core clusters provide evidence that the presence of cold, atomic and molecular gas in their centers is more common than previously expected. This finding has important implications for the fueling of and feedback from the supermassive black holes … Continue reading "CRA Cosmic Coffee: KwangHo Park"

Title: Design of an Expanding Cosmological Background for the Moving Punctures approach to Numerical Relativity Abstract: Predicted in 1916 by Albert Einstein in his theory of general relativity, gravitational waves are now at the heart of modern astrophysics. Created in some of the most energetic events in the universe, such as binary black hole collisions, … Continue reading "CRA Cosmic Coffee: Jordi Manyer"

Title: The Evolving X-ray Spectrum of Active Galactic Nuclei Abstract: The cosmic X-ray background (XRB) spectrum and active galaxy number counts encode essential information about the spectral evolution of active … Continue reading "CRA Cosmic Coffee: Mathilda Avirett-Mackenzie"