Title: Galaxy Evolution and the Cosmic Baryon Cycle in 3D Abstract Galaxies are intricately linked to the gas in and around them, making the characterization of gas flows essential for directly constraining star formation, gas flow rates, and feedback processes, as well as for testing modern theories of galaxy evolution. The recent deployment of highly … Continue reading "CRA Seminar – Yuguang Chen UC-Davis"
Title: The anti-aligned spin of GW191109: Glitch Mitigation and its Implications Abstract: One of the most interesting events in the third LVK observing run was GW191109, which was found to have spins which were confidently anti-aligned with the orbital angular momentum - one of only two such cases which has been released - and high … Continue reading "CRA Seminar – Rhiannon Udall, Caltech"
Title: Probing neutron star physics via multimessenger astronomy Abstract: In this talk I will review recent work that allowed us to obtain a better understanding of the neutron star equation of state and neutron star properties by use of multimessenger observations of (binary) neutron stars. I will also discuss recent and current efforts of modeling binary neutron … Continue reading "CRA Seminar – Vasilis Paschalidis, U. of Arizona [Host Tamara Bogdanovic]"
Title: Dust Scattering Halo of black hole binary 4U 1630-47 Observed with Chandra and APEX: Using mm and X-ray Imaging to Constrain Source and Molecular Cloud Distances Abstract: Dust scattering halos have been utilized to study spectral variations during eclipses, physical properties and distribution of dust grains in the interstellar medium (ISM), X-ray extinction, and … Continue reading "CRA Seminar – Emrah Kalemci [Host Matthew Liska]"
Title: Thermonuclear X-ray Bursts in the NICER Era Abstract: Thermonuclear X-ray bursts are sudden flashes observed from some low-mass X-ray binaries. Time-resolved spectral analysis and long-term observations have revealed that they occur due to the unstable thermonuclear burning of the accreted matter on the surface of the neutron star. They typically last a few tens of … Continue reading "CRA Seminar – Tolga Guver [Host Matthew Liska]"
Title: The Growth and Evolution of SMBHs via Galaxy Mergers Abstract: After decades of SMBH observations, the connection between AGN triggering and galaxy mergers remains incomplete, although AGN are likely key players in the evolution of massive galaxies. Theoretically, there are many reasons to expect a link between galaxy mergers and the accretion of material … Continue reading "CRA Seminar – Adi Foord, U. of Maryland Baltimore County [Host Tamara Bogdanovic]"
Title: Probing the inner geometry of AGN accretion flows and searching for SMBHB candidates in large optical sky surveys Abstract: Observations of the AGN Fairall 9 with NICER and Swift revealed a strong relationship between the flux of the UV continuum and the X-ray soft excess, indicating the presence of a “warm” Comptonized region which … Continue reading "CRA Seminar: Ethan Partington, IA-FORTH (Host Laura Cadonati)"
Title: The Origin of Supermassive Black Holes from Pop III.1 Seeds Abstract: The origin of supermassive black holes (SMBHs) is a key open question for contemporary astrophysics and cosmology. Here we discuss the predictions of a model of SMBH formation from Pop III.1 protostars, i.e., metal-free stars forming in locally isolated dark matter minihalos, where dark … Continue reading "Special CRA Seminar – Jonathan C. Tan [Host John Wise]"
Title: Understanding the dynamics of accretion onto black holes in radiation GRMHD simulations Abstract: Radiation and magnetic fields play crucial roles in shaping the physics of black hole accretion, especially in near- and super-Eddington regimes. To model this process, we solve the GRMHD equations coupled with angle-dependent radiation transfer, which enables us to capture the complex dynamics driven … Continue reading "CRA Seminar – Lizhong Zhang, Flatiron Institute (Host Julia Speicher)"
Title: Facilitating Multi-Messenger Astrophysics with Timely Information about Gravitational Waves Abstract: In the age of multi-messenger astrophysics, providing timely information about gravitational-wave events is vital to achieve coincident detections. Electromagnetic counterparts to gravitational waves originating from compact binary coalescences containing at least one neutron star can help answer unsolved questions in physics such as the … Continue reading "CRA Seminar: Caitlin Rose, Georgia Tech [ Surabhi Sachdev]"
