Events List

DateEvent TypeSpeaker
12/02/2024CCPP Brown BagChris Dessert [ + ]
12/02/2024Astro Journal Club [ + ]
12/03/2024Informal HEP TalkCaio Nascimento [ + ]
12/03/2024Astro SeminarRavi Sheth [ + ]
12/04/2024ArXiv Discussion [ + ]
12/04/2024HEP SeminarPeizhi Du [ -- ]

Title: Dark Radiation Isocurvature from Cosmological Phase Transitions
Abstract: Cosmological first-order phase transitions are typically associated with physics beyond the Standard Model, and thus of great theoretical and observational interest. In this talk, I will show that a broad class of non-thermal first-order phase transitions could generate distinct large-scale isocurvature in dark radiation that can be observable in the CMB. We derive constraints on Delta N_eff from phase transitions based on CMB+BAO data, which can be much stronger than that from adiabatic initial conditions. I will also demonstrate that since perturbations of dark radiation have a non-Gaussian origin, searches for non-Gaussianity in the CMB could also place a stringent bound on Delta N_eff. (2:00 PM - 3:15 PM, 726 Broadway, 940, CCPP Seminar)
12/05/2024Astro Research GroupHogg/Blanton [ + ]
12/05/2024Pullen Group Meeting [ + ]
12/06/2024Big Apple ColloquiumAndrea Ghez [ + ]
12/06/2024HEP Discussion SessionsQ. Weller and M. Calkins [ + ]
12/09/2024CCPP Brown BagAnna Suliga [ + ]
12/09/2024Astro Journal Club [ + ]
12/10/2024Special SeminarDavid Hogg et. al [ + ]
12/10/2024Astro SeminarKeith Hawkins [ + ]
12/11/2024ArXiv Discussion [ + ]
12/11/2024HEP SeminarNathaniel Craig [ + ]
12/12/2024Astro Research GroupHogg/Blanton [ + ]
12/12/2024Pullen Group Meeting [ + ]
12/12/2024Physics Dept ColloquiumVincenzo Vitelli [ + ]
12/13/2024Holiday Party [ + ]
12/13/2024HEP Discussion SessionsQ. Weller and M. Calkins [ + ]
12/23/2024Holiday [ + ]
12/24/2024Holiday [ + ]
12/25/2024Holiday [ + ]
12/26/2024Holiday [ + ]
12/27/2024Holiday [ + ]
12/30/2024Holiday [ + ]
12/31/2024Holiday [ + ]