Group Meetings

Published by admin on Monday, March 1, 2010

The Gravity Group at UMississippi has a regular weekly scheduled meeting throughout the year to discuss current research progress, topics of interest and new papers. Typically, each week, two members of the group each make a short presentation, either about their current area of research or a paper that has attracted their interest.

For Spring semester 2024, the Group meets on Mondays at 5-6PM for a research update, both a scheduled ca. half hour presentation and room for free-form updates, and on Thursdays at 4-5PM for a journal club. The schedule of speakers for this period is:

Group Meeting Schedule(*subject to change)

Date Research Presentation Paper Presentation
Jan 29 & Feb 1 [no meeting] arXiv discussion
Feb 5 & Feb 8 Nathan Cody
Feb 12 & Feb 15 Lorena Joe
Feb 19 & Feb 22 [no meeting] [no meeting]
Feb 26 & Feb 29 Purnima & Aniket Károly & Amitesh
Mar 4 & Mar 7 Subhayu Dipika (5:00PM)
Mar 11 & Mar 14 spring break
Mar 18 & Mar 21 Arindam (paper) seminar
Mar 25 & Mar 28 Cody seminar
Apr 1 & Apr 4 APS presentation practice [no meeting]
Apr 8 & Apr 11 [no meeting] seminar
Apr 15 & Apr 18 Amitesh & Joe Aniket
Apr 22 & Apr 25 [no meeting] seminar
Apr 29 & May 2 Raisa (paper) & James Cody (course presentation)

The group also has a running series where an external speaker is invited to give seminar talk during one of the usual meetings on their area of research or any topic of interest. The seminar then replaces the usual format of the meetings on those days. The list of external speakers will be updated as time goes on.

The Gravity Seminar series will take place during the weekly journal club slot for Spring Semester 2024.

Tentative List of Seminars(*subject to change)

Date Speaker Affiliation Title of talk
March 21 Isobel Romero-Shaw University of Cambridge Decoding the Gravitational-Wave Biographies of Binary Black Holes
March 28 Yanyan Zheng Missouri S&T Detecting gravitational waves from core-collapse supernovae
April 11 Sebastian Völkel AEI Potsdam One ring to rule them all? Quasi-normal modes and the black hole ringdown
April 25 Shrobana Ghosh AEI Hannover Inspiral-Merger-Ringdown waveform modeling to estimate spins of astrophysical black holes

The next scheduled seminar speaker is Shrobana Ghosh

Title: Inspiral-Merger-Ringdown waveform modeling to estimate spins of astrophysical black holes
Abstract: The LIGO-Virgo-KAGRA (LVK) collaboration has published about 90 gravitational wave observation since the first detection in 2015, majority of which have been from binary black holes. With such a statistically significant number of events it is possible to infer astrophysical distribution of black hole masses and spins. Of particular interest are spins(mis-aligned with the orbital angular momentum) of the component black holes in a binary, as they can shed light on the binary formation mechanism. Spin-misalignments of the component black holes leave their imprints on the waveform. One such modulation is due to an asymmetry between the +m and -m multipoles of the harmonic decomposition of the gravitational wave signal from the binary. This is not included in most signal models used in LVK analysis to date. I will present the first frequency-domain model of the asymmetry in the dominant co-precessing-frame signal multipole throughout inspiral, merger and ringdown. This model has been incorporated into the latest iteration of PHENOM family of precessing-binary models (PhenomXO4a) that will be used for analysing data from the fourth observing run (O4) of the LVK. I will briefly describe the features captured in PhenomXO4a and the prospect of spin measurements using this model.

The archive of previous seminars is here.

Note: Due to the current COVID-19 situation, the meetings have shifted to a hybrid format. This format will be followed until otherwise announced. In case one wishes to participate, please direct your queries to either Dr. Leo Stein <lcstein@olemiss.edu>
or Dr. Anuradha Gupta <agupta1@olemiss.edu>.