Events List

DateEvent TypeSpeaker
10/01/2024Special SeminarDavid Hogg et. al [ + ]
10/01/2024No Astro Seminar [ + ]
10/02/2024ArXiv Discussion [ + ]
10/02/2024HEP SeminarHerman Verlinde [ + ]
10/03/2024Astro Research GroupHogg/Blanton [ + ]
10/03/2024Pullen Group Meeting [ + ]
10/03/2024Physics Dept ColloquiumSubir Sachdev [ + ]
10/04/2024Informal Astro TalkClaire Lamman [ + ]
10/04/2024HEP Discussion SessionsQ. Weller and M. Calkins [ + ]
10/07/2024CCPP Brown BagGlennys Farrar [ + ]
10/07/2024Astro Journal Club [ + ]
10/08/2024Special SeminarDavid Hogg et. al [ + ]
10/08/2024Astro SeminarFabio Pacucci [ -- ]

Title: JWST's Little Red Dots: Masters of Disguise in the High-Redshift Universe
Abstract: This talk will explore the exciting journey to probe several populations of black holes, spanning from the distant to the local Universe. I will focus primarily on the "little red dots" (LRDs), a newly discovered and puzzling population of compact red sources at redshift z > 4, identified by JWST. These objects challenge our current astrophysical models in several ways. First, I will discuss the detection of overmassive black holes relative to the stellar mass of their host galaxies. Second, I will address the X-ray weakness problem, where these sources remain undetected in deep X-ray surveys. I will use advanced GRRMHD simulations to show how mildly super-Eddington accretion onto slowly spinning black holes can resolve this issue. Third, I will explore the extremely high stellar densities at the cores of these objects and their potential for triggering runaway stellar collisions. Throughout the talk, I will also discuss how the LRDs represent a perfect bridge to study other populations of black holes, with a focus on the role of future and perspective observatories such as HWO and AXIS. These include the search for black hole seeds at redshifts z = 20-30 and the detection of quiescent black holes in the local Universe. (2:00 PM - 3:00 PM, 726 Broadway, 940, CCPP Seminar)
10/09/2024ArXiv Discussion [ + ]
10/09/2024HEP SeminarAditya Parikh [ + ]
10/10/2024Astro Research GroupHogg/Blanton [ + ]
10/10/2024Physics Dept ColloquiumKurt Kremer [ + ]
10/11/2024HEP Discussion SessionsQ. Weller and M. Calkins [ + ]
10/14/2024Holiday [ + ]
10/15/2024Astro SeminarAlisa Galishnikova [ + ]
10/16/2024ArXiv Discussion [ + ]
10/16/2024HEP SeminarShirley Li [ + ]
10/17/2024Astro Research GroupHogg/Blanton [ + ]
10/17/2024Pullen Group Meeting [ + ]
10/17/2024Physics Dept ColloquiumKenneth Burch [ + ]
10/18/2024Informal HEP TalkAlessandro Sfondrini [ + ]
10/18/2024HEP Discussion SessionsQ. Weller and M. Calkins [ + ]
10/21/2024CCPP Brown BagWenzer Qin [ + ]
10/21/2024Astro Journal Club [ + ]
10/22/2024Informal Astro TalkTom Wagg [ + ]
10/23/2024ArXiv Discussion [ + ]
10/23/2024HEP SeminarAkaxia Cruz [ + ]
10/24/2024Astro Research GroupHogg/Blanton [ + ]
10/24/2024Pullen Group Meeting [ + ]
10/25/2024HEP Discussion SessionsQ. Weller and M. Calkins [ + ]
10/28/2024CCPP Brown BagDavid Dunsky [ + ]
10/28/2024Astro Journal Club [ + ]
10/29/2024Special SeminarDavid Hogg et. al [ + ]
10/30/2024ArXiv Discussion [ + ]
10/30/2024HEP SeminarZohar Komargodski [ + ]
10/30/2024Physics Dept ColloquiumJuan de Pablo [ + ]
10/31/2024Astro Research GroupHogg/Blanton [ + ]
10/31/2024Pullen Group Meeting [ + ]