MN Institute for Astrophysics Journal Club

semester, 2019

Thursday, January 31st 2019
12:10 pm:
Speaker: Nico Adams and Terry Jones

Thursday, February 7th 2019
Speaker: Michael Coughlin, California Institute of Technology
Subject: Searching for compact binaries in the gravitational-wave and optical time domain
Today's Journal Club meeting will be the faculty candidate presentation

Binary neutron star mergers provide one of the richest laboratories for studying physics with ground-based interferometric gravitational-wave detectors such as advanced LIGO and Virgo. After such a merger, a compact remnant is left over whose nature depends primarily on the masses of the inspiralling objects and on the equation of state of nuclear matter. We will discuss the search for post-merger signals from GW170817. In addition, we will describe ongoing searches for the detection of transients like GW170817 in electromagnetic wavelengths. With the Zwicky Transient Facility (ZTF) recently achieving first light, it is now fruitful to use its unprecedented combination of depth, field of view, and survey cadenceto perform Target of Opportunity observations. We willdemonstrate on short gamma-ray bursts how it is possible to use this system to do follow-up on this scale. Finally, we will discuss the ongoing efforts to use ZTF and a new instrument at the Kitt Peak 2.1m to find and characterize white dwarf binaries.

Thursday, February 14th 2019
Speaker: Sarah Vigeland, University of Wisconsin-Milwaukee
Subject: Probing Massive and Supermassive Black Holes with Gravitational Waves
Today's Journal Club meeting will be the faculty candidate presentation

Observations have shown that nearly all galaxies harbor massive or supermassive black holes at their centers. Gravitational wave (GW) observations of these black holes will shed light on their growth and evolution, and the merger histories of galaxies. Massive and supermassive black holes are also ideal laboratories for studying strong-field gravity. Pulsar timing arrays (PTAs) are sensitive to GWs with frequencies ~1-100 nHz, and can detect GWs emitted by supermassive black hole binaries, which form when two galaxies merge. The Laser Interferometer Space Antenna (LISA)is a planned space-based GW detector that will be sensitive to GWs ~1-100 mHz, and it will see a variety of sources, including merging massive black hole binaries and extreme mass-ratio inspires (EMRIs), which consist of a small compact object falling into a massive black hole. I will discuss source modeling and detection techniques for LISA and PTAs, as well as present limits on nanohertz GWs from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) collaboration.

Thursday, February 21st 2019
12:10 pm:
Speaker: Grantland Hall and Pat Kelly

Thursday, February 28th 2019
12:10 pm:
Speaker: Roberta Humphreys and Avery Garon

Thursday, March 7th 2019
12:10 pm:
Speaker: Sourabh Chauhan and Evan Tyler

Thursday, March 14th 2019
12:10 pm:
Speaker: Nathan Eggen and Larry Rudnick

Thursday, March 21st 2019
12:10 pm:
There will be be no Journal Club this week due to spring break

Thursday, March 28th 2019
12:10 pm:
Speaker: Jin-Ah Kim and Liliya Williams

Thursday, April 4th 2019
12:10 pm:
Speaker: Karl Young

Thursday, April 11th 2019
12:10 pm:
Speaker: Sean Bruton and Hugh Dickinson

Thursday, April 18th 2019
12:10 pm:
Speaker: Mike Makmur and Vihang Mehta

Thursday, April 25th 2019
12:10 pm:
Speaker: Trevor Knuth and Evan Skillman

Thursday, May 2nd 2019
12:10 pm:
Speaker: Tom Jones and Jamie Cheshire

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