MN Institute for Astrophysics Journal Club

semester, 2015

Thursday, January 29th 2015
Speaker: Terry J. Jones

Thursday, February 12th 2015
Speaker: Larry Rudnick

Thursday, February 19th 2015
Speaker: Ryan Arneson

Thursday, February 26th 2015
Speaker: Soroush Sotoudeh and Evan Skillman

Thursday, March 5th 2015
Speaker: Evan Nuckolls and Liliya Williams

Thursday, March 12th 2015
Speaker: Chris Nolting and Robert Lysak

Thursday, March 26th 2015
Speaker: Taryn Heilman and Amit Kashi

Thursday, April 2nd 2015
Speaker: Mehdi Lame'e

Thursday, April 9th 2015
Speaker: Matt Gomer

Thursday, April 16th 2015
Speaker: Tony Young

Thursday, April 23rd 2015
Speaker: Cody Carr and Kristy McQuinn

Thursday, April 30th 2015
Speaker: Vihang Mehta and Claudia Scarlata

Thursday, May 7th 2015
Speaker: Brian O'Neill and Bob Gehrz

Thursday, September 17th 2015
Speaker: Betsey Adams, Astronomy, NL
Subject: Probing the extreme edges of galaxy formation with ALFALFA

The ALFALFA HI survey has detected rare but extremely interesting HI sources that probe the extreme limits of systems that are able to form stars. These sources include the ultra-compact high velocity clouds (UCHVCs), some of which may represent gas-rich but (nearly) starless Local Group galaxies; the low-mass gas-rich SHIELD dwarf galaxies; and the "Almost-Dark" HI sources, which are clearly extragalactic HI detections that have no discernible optical counterpart in extant optical surveys. I will discuss these different source populations and how they are interconnected, highlighting one system, AGC 226067, that bridges the three categories. I will also focus in particular on the UCHVCs as candidate Local Group galaxies, highlighting one particular source, AGC 198606, for which HI observations with WSRT and deep WIYN/ODI optical imaging strongly support the hypothesis that it represents gas in a nearby dark matter halo.

Thursday, September 24th 2015
Speaker: Terry Jones

Thursday, October 1st 2015
Speaker: Mellanie Galloway

Thursday, October 8th 2015
Speaker: Michael Gordon, Dinesh Shenoy, Roberta Humphreys

Thursday, October 15th 2015
Speaker: Karlen Shahinyan and Soroush Sotoudeh

Thursday, October 22nd 2015
Speaker: Tony Young and Claudia Scarlata

Thursday, October 29th 2015
Speaker: Ryan Arneson and Michael Rutkowski

Thursday, November 5th 2015
Speaker: Amit Kashi and Stou Sandalski

Thursday, November 12th 2015
Speaker: Karl Young and Liliya Williams

Thursday, November 19th 2015
Speaker: Marc Kuchner, NASA Goddard
Subject: Disk Detective: Crowdsourced Discovery of Planetary Systems

Have you discovered a planetary system today? If not, don't worry. At, you can help scour the WISE data archive to find new planetary systems and candidate advanced extraterrestrial civilizations. Volunteers at this new citizen science website have already performed almost 1.5 million classifications of WISE sources, searching a catalog 8x the size of any previously published survey. Through a follow-up spectroscopic and imaging campaign in both hemispheres we are re-observing many user-classified Objects of Interest to further vet them for background contaminants and derive better spectral types. Come by to hear about our growing catalog of candidate debris disks, protoplanetary disks, and other interesting objects with 22 micron excess all around the sky--and some strange stories about doing science with 28,000 helpers.

Thursday, November 26th 2015
Speaker: No Journal Club - Thanksgiving holiday

Thursday, December 3rd 2015
Speaker: Chris Nolting and Larry Rudnick

Thursday, December 10th 2015
Speaker: Melanie Beck and Wlodek Kluzniak (Copernicus Astronomical Center, Warsaw, Poland)

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