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 … Continue reading "CRA Cosmic Coffee: Ziqian Hong"
3D Radiation Magneto-hydrodynamic Simulations of Accretion Disks around Supermassive Black Holes Abstract: Black hole accretion disks convert the gravitational energy of accreted gas to photons and produce varies observational phenomena … Continue reading "CRA seminar: Dr. Yan-Fei Jiang (University of California Santa Barbara)"
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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 … 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 … 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 … Continue reading "CRA Cosmic Coffee: Jordi Manyer"
Title: A multi-observatory X-ray approach to characterize heavily obscured AGNs According to the different models of Cosmic X-ray Background (CXB), the diffuse X-ray emission observed in the 1 to ~200-300 keV band, is mainly caused by accreting supermassive black holes, the so-called active Galactic Nuclei (AGN). Particularly, at the peak of the CXB (~30 keV) … Continue reading "CRA Seminar: Dr. Stefano Marchesi (Clemson University)"
Monte Carlo Simulation and Balloon-Borne Observation of Energetic Radiations and Electromagnetic Fields from Thunderstorms and Lightning Mahdi Bagheri Space Science Center and Physics Department, University of New Hampshire Abstract: Lightning is one of the most energetic geophysical phenomena, producing the brightest light and loudest sound commonly occurring on Earth. Because of its high … Continue reading "CRA Seminar: Mahdi Bagheri (University of New Hampshire)"
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 galactic nuclei (AGNs) and have been successfully modeled by XRB synthesis models for many years. Recent measurements of the 8–24 keV AGN number counts by … Continue reading "CRA Cosmic Coffee: Mathilda Avirett-Mackenzie"
Title: How Black Holes Dine above the Eddington "Limit" without Overeating or Excessive Belching Abstract The study of super-Eddington accretion is essential to our understanding of the growth of super-massive black holes in the early universe, the accretion of tidally disrupted stars, and the nature of ultraluminous X-ray sources. Unfortunately, this mode of accretion is … Continue reading "CRA seminar: Prof. Shane Davis (University of Virginia)"
