Seminar archive 2018

Raw date Event date Title Speakers Host Summary Links
20180226 Feb. 26, 2018, 2:00 pm Stellar Streams Discovered in the Dark Energy Survey Nora Shipp, U. Chicago Yuanyuan Zhang We perform a search for stellar streams around the Milky Way using the first three years of multi-band optical imaging data from the Dark Energy Survey (DES). We use DES data covering ∼5000 sq. deg. to a depth of g>23.5 with a relative photometric calibration uncertainty of <1%. This data set yields unprecedented sensitivity to... More »
20180226 Feb. 26, 2018, 2:00 pm Stellar Streams Discovered in the Dark Energy Survey Nora Shipp, U. Chicago We perform a search for stellar streams around the Milky Way using the first three years of multi-band optical imaging data from the Dark Energy Survey (DES). We use DES data covering ∼5000 sq. deg. to a depth of g>23.5 with a relative photometric calibration uncertainty of <1%. This data set yields unprecedented sensitivity to... More »
20180305 March 5, 2018, 2:00 pm TBD Kimberly Boddy, Johns Hopkins
20180319 March 19, 2018, 2:00 pm Intensity Interferometry in the Era of Giant Telescopes Albert Stebbins, FNAL Three widely separated 30m class optical telescopes (E-ELT, GMT, TMT) will start observations in the coming decade and will provide a new opportunity to probe moderately dim sources with unprecedented angular resolution using the spectroscopic count intensity interferometry technique (see Hanbury Brown and Twiss).  The large baselines which extend up to 10,000 km probe angular... More »
20180326 March 26, 2018, 2:00 pm TBD Michael Cooper, UC Irvine
20180402 April 2, 2018, 2:00 pm TBD Mike Boylan-Kolchin, UT Austin
20180409 April 9, 2018, 2:00 pm TBD Andrew Long, U. Chicago KICP
20180416 April 16, 2018 No Seminar (APS Meeting) N/A
20180423 April 23, 2018, 2:00 pm TBD Mark Devlin, UPenn
20180430 April 30, 2018, 2:00 pm TBD Heidi Wu
20180507 May 7, 2018, 2:00 pm TBD Jason Detwiler, U Wisconsin Madison
20180521 May 21, 2018, 2:00 pm TBD Brian Keating, UC San Diego
20180530 May 30, 2018, 2:00 pm Galaxy cluster mass measurements in the Dark Energy Survey Tom McClintock, University of Arizona Galaxy clusters are a powerful probe of cosmological parameters and host up to hundreds of galaxies. These clusters reside in massive dark matter halos, which are virialized structures comprised of up to a few times 10^15 solar masses. Forming the foundation of galaxy cluster cosmology are two critical components: measurements of cluster masses, and models... More »
20180604 June 4, 2018, 2:00 pm Anisotropies in the Gravitational Wave Background from Cosmological Phase Transitions Yuhsin Tsai, U Maryland Phase transitions in the early universe can readily create an observable stochastic gravitational wave background. I will argue that such a background necessarily contains anisotropies analogous to those of the cosmic microwave background (CMB) of photons, and that these too may be within reach of proposed gravitational wave detectors. Correlations within the gravitational wave anisotropies... More »
20180611 June 11, 2018, 2:00 pm The Linear Point: a cleaner cosmological standard ruler in the galaxy correlation Stefano Anselmi, Observatoire de Paris Cosmology has made fundamental progress thanks to the role of standard rulers: objects of known size that are constant in redshift. The acoustic peak in the large scale structure clustering correlation function is one of them. However, in the era of precision cosmology, its power has been highly challenged by late time non-linear effects that... More »
20180618 June 18, 2018, 2:00 pm TBD Oren Slone, Princeton
20180625 June 25, 2018, 2:00 pm TBD Julio Navarro, U Victoria
20180709 July 9, 2018, 2:00 pm A New Frontier in the Search for Dark Matter  Gordan Krnjaic, Fermilab The gravitational evidence for the existence of dark matter is overwhelming; observations of galactic rotation curves, the CMB power spectrum, and light element abundances independently suggest that over 80% of all matter is “dark” and beyond the scope of the Standard Model. However, its particle nature is currently unknown, so discovering its potential non-gravitational interactions... More »
20180730 July 30, 2018, 2:00 pm TBD Jia Liu, UChicago
20180806 Aug. 6, 2018, 2:00 pm TBD Robert Nemiroff, MTU
20180808 Aug. 8, 2018, 2:00 pm TBD (Note different day) Francesco Navarro
20180813 Aug. 13, 2018, 2:00 pm TBD Asher Berlin, SLAC
20180813 Aug. 13, 2018, 2:00 pm Massive Gravity and Cosmology Rachel Rosen, Columbia
20180917 Sept. 17, 2018, 2:00 pm TBD Eduardo Rozo, Arizona
20180924 Sept. 24, 2018, 2:00 pm TBD Kate Scholberg, Duke
20181001 Oct. 1, 2018, 2:00 pm TBD Julian Munoz, Harvard
20181015 Oct. 15, 2018, 2:00 pm TBD Yao-Yuan Mao, Pittsburgh
20181029 Oct. 29, 2018, 2:00 pm TBD Suzanne Staggs, Princeton
20181105 Nov. 5, 2018, 2:00 pm Dark matter axion clumps Mark Hertzberg, Tufts In this talk I begin by reviewing how dark matter axions can undergo Bose-Einstein condensation and why this is captured by classical field theory. I explain that such condensates are spatially localized clumps, as they are organized by gravitation and self-interactions, and they may populate the galaxy. I discuss both the ground state and finite... More »
20181112 Nov. 12, 2018, 2:00 pm TBD Reyco Henning, UNC Chapel Hill
20181119 Nov. 19, 2018, 2:00 pm TBD Raymond Co, Michigan
20181126 Nov. 26, 2018, 2:00 pm TBD Deanna Hooper, Aachen University Dan Hooper
20181203 Dec. 3, 2018, 2:00 pm TBD Anson Hook, University of Maryland, College Park Gordan
20181210 Dec. 10, 2018, 2:00 pm TBD Hongwan Liu, MIT TBD
20181217 Dec. 17, 2018, 2:00 pm TBD Nilanjan Banik, Amsterdam/Leiden