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

Thursday, May 16th 2019
There will be no journal club this week.

Thursday, September 5th 2019
12:10 pm:
No Journal Club this week

Thursday, September 12th 2019
12:10 pm:
Speaker: Sean Bruton and Nico Adams
Subject: “A dominant population of optically invisible massive galaxies in the early Universe” & "The chemical structure of young high-mass star-forming clumps: Deuteration"

Sean Bruton:
“A dominant population of optically invisible massive galaxies in the
early Universe”

Nico Adams:
"The chemical structure of young high-mass star-forming clumps: Deuteration"


Thursday, September 19th 2019
12:10 pm:
Speaker: Sharan Banagiri
Subject:  Observation of the Vela pulsar glitch and modeling rotational evolution

Thursday, September 26th 2019
12:10 pm:
Speaker: Cindy Cattell and Shaul Hanany
Subject: See abstract for titles

Cattell: ""Exploring particle acceleration in space plasmas (sun, solar wind and
magnetospheres) using spacecraft data, simulations and lab plasma
experiments"


Thursday, October 3rd 2019
12:10 pm:
Speaker: Yu-Heng Lin and Vihang Mehta
Subject: Titles in abstract section

Yu-Heng Lin:
"Constraints on the production and escape of ionizing radiation from the
emission-line spectra of metal-poor star-forming galaxies,"
https://arxiv.org/pdf/1909.07386.pdf

Vihang Mehta:
"Understanding the Discrepancy between IRX and Balmer Decrement in
Tracing Galaxy Dust Attenuation," Qin et al. (2019)
https://arxiv.org/abs/1909.13505


Thursday, October 10th 2019
12:10 pm:
Speaker: Eliot Quataert, UC Berkeley
Subject: What Happens When a Massive Star Fails (Sort of) to Explode?

There are observational and theoretical reasons to suspect that up to 10s of percent of massive stars that undergo core-collapse at the end of their lives fail to explode in a canonical energetic supernova explosion. In this talk I will describe what transpires in such nominally failed supernovae and its importance for understanding the masses and spins of black holes (e.g., detected by LIGO). I will also describe how 'failed' supernovae may manifest themselves observationally in time-domain surveys.


Thursday, October 17th 2019
12:10 pm:
Speaker: Trevor Knuth and Claudia Scarlata
Subject: Titles/links in abstract section

Claudia Scarlata:
An Xray detection of star-formation in a highly magnified giant arc"
Bayliss et al. (nature astronomy)
(https://arxiv.org/ftp/arxiv/papers/1910/1910.05343.pdf)

Trevor Knuth:
"Planetary Exploration Using Cubesat Deployed Sailplanes"
(https://arxiv.org/ftp/arxiv/papers/1910/1910.03842.pdf)


Thursday, October 24th 2019
12:10 pm:
Speaker: Nathan Eggen and Patrick Kelly
Subject: Titles in abstract section

Nathan Eggen:
A search for optical AGN variability in 35,000 low-mass galaxies with
the Palomar Transient Factory"
Baldassare etal, arXiv:1910.06342

Pat Kelly:
"Gravitational Lensing Signatures of Axion Dark Matter Minihalos in
Highly Magnifed Stars"
Liang Dai, Jordi Miralda-Escudé, arXiv:1908.01773


Thursday, October 31st 2019
12:10 pm:
Speaker: Roberta Humphreys and Lindsay Glesener

Thursday, November 7th 2019
12:10 pm:
Speaker: Jin-Ah Kim and Larry Rudnick

Thursday, November 14th 2019
12:10 pm:
Speaker: Chris Nolting and Terry Jones

Thursday, November 21st 2019
12:10 pm:
Speaker: Evan Skillman and Liliya Williams

Thursday, November 28th 2019
12:10 pm:
No Journal Club due to Thanksgiving

Thursday, December 5th 2019
12:10 pm:
Speaker: Jamie Cheshire and Tom Jones

Thursday, December 12th 2019
12:10 pm:
No Journal Club this week

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