Events List

DateEvent TypeSpeaker
11/01/2018Physics Dept ColloquiumHoward Stone [ + ]
11/02/2018NYU-CCA LSS Group MtgNYU-CCA LSS Group Mtg [ + ]
11/02/2018ISCISC [ + ]
11/05/2018CCPP Brown BagJohann Brehmer [ + ]
11/05/2018Informal Astro TalkSeunghwan Lim [ + ]
11/05/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
11/06/2018Modjaz Group MtgModjaz Group Mtg [ + ]
11/06/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
11/06/2018Astro SeminarApurva Oza [ + ]
11/07/2018Informal Astro TalkPaz Beniamini [ -- ]

Title: Observational constraints on the structure of gamma-ray burst jets and lessons from GW170817
Description: Motivated by GW170817 we examine three independent constraints on the angular structure of gamma-ray burst (GRB) jets that are required by observations of cosmological long GRBs. We find that efficient gamma-ray emission has to be restricted to material with Gamma>50 and is most likely confined to a narrow region around the core. Comparing GRB170817 with the regular population of short GRBs (sGRBs), we show that an order unity fraction of NS mergers result in sGRB jets that breakout of the surrounding ejecta, that their luminosity function must be intrinsically peaked and that sGRB jets are typically narrow with opening angles ~ 0.1 rad. Finally, we perform Monte Carlo simulations to examine models for the structure and efficiency of the prompt emission in off-axis sGRBs. We find that only a small fraction, 0.01-0.1, of NS mergers detectable by LIGO/VIRGO in GWs is expected to be also detected in prompt gamma-rays, and GW170817-like events are very rare. (10:00 AM - 11:00 AM, 726 Broadway, 902, Lg Conf)
11/07/2018HEP SeminarIra Rothstein [ + ]
11/07/2018Astro PhAstro Ph [ + ]
11/08/2018Physics Dept ColloquiumBob Austin [ + ]
11/09/2018ISCISC [ + ]
11/12/2018CCPP Brown BagNO CCPP BROWN BAG TODAY [ + ]
11/12/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
11/12/2018OtherJoshua Ruderman [ + ]
11/13/2018Modjaz Group MtgModjaz Group Mtg [ + ]
11/13/2018Astro SeminarTristan Smith [ + ]
11/13/2018Special SeminarMark Hertzberg [ + ]
11/14/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
11/14/2018HEP SeminarArvin Shahbazi-Moghaddam [ + ]
11/14/2018Astro PhAstro Ph [ + ]
11/15/2018Physics Dept ColloquiumShmuel Rubinstein [ + ]
11/16/2018Informal HEP TalkHongwan Liu [ + ]
11/16/2018NYU-CCA NYU-CCA [ + ]
11/16/2018Big Apple ColloquiumAmina Helmi [ + ]
11/16/2018ISCISC [ + ]
11/19/2018CCPP Brown BagMatt Kleban [ + ]
11/19/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
11/20/2018Modjaz Group MtgModjaz Group Mtg [ + ]
11/21/2018HEP Seminar [ + ]
11/27/2018Modjaz Group MtgModjaz Group Mtg [ + ]
11/27/2018Astro SeminarJo Dunkley [ + ]
11/28/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
11/28/2018HEP SeminarMikhail Shaposhnikov [ + ]
11/28/2018Astro PhAstro Ph [ + ]
11/29/2018Physics Dept ColloquiumScott Tremaine [ + ]
11/30/2018NYU-CCANYU-CCA [ + ]
11/30/2018Special ColloquiumAndrea Maccio [ + ]
11/30/2018ISCISC [ + ]