Upcoming Events For Astrophysics Seminar

Tue Sep 22, 2020

Astrophysics Seminar: Dr. Benjamin Rose, Duke University

12:45 PM - 1:45 PM
zoom

Systematics Limited Cosmology with the Roman Space Telescope

Dr. Benjamin Rose (ND PhD Alum)
Duke University

The Nancy Grace Roman Space Telescope (formerly WFIRST) is a wide-field infrared space telescope that will launch in the mid-2020s. With 100 times the field of view of Hubble, the Roman Space Telescope is designed for surveys. I will present an overview of the Roman Space Telescope capabilities, its two instruments, and the three main legacy surveys. Including its vast archive and GO capabilities, Roman is a telescope for the entire astrophysics community. The Roman Space Telescope is designed, in part, for precision cosmological measurements. I will describe the preparations we are making today to take full advance of Roman's cosmological measurements: both by the use of dedicated calibration hardware and improvements of our understanding of distance measurements with Type Ia Supernovae.…

Posted In: Astrophysics Seminar

Tue Sep 29, 2020

Astrophysics Seminar: Prof. Constantine Deliyannis, IU Bloomington

12:45 PM - 1:45 PM
zoom

Title TBA

Prof. Constantine Deliyannis
Indiana University, Bloomington

Hosted by Prof. Mathews

All interested persons are invited to attend remotely—email physics@nd.edu for information.…

Posted In: Astrophysics Seminar

Tue Oct 6, 2020

Astrophysics Seminar: Charlotte Wood, University of Notre Dame

12:45 PM - 1:45 PM
zoom

Title TBA

Charlotte Wood
Physics Graduate Student
University of Notre Dame…

Posted In: Astrophysics Seminar

Tue Oct 13, 2020

Astrophysics Seminar: Dr. Cassi Lochhaas, STScI

12:45 PM - 1:45 PM
zoom

Title TBA

Dr. Cassi Lochhaas
STScI

Hosted by Dr. Lehner

Posted In: Astrophysics Seminar

Tue Oct 20, 2020

Astrophysics Seminar: Yue Hu, University of Wisconsin-Madison

12:45 PM - 1:45 PM
zoom

Predictions of cosmic microwave background foreground dust polarization using velocity gradients

Yue Hu
Graduate Student, University of Wisconsin-Madison

Observations of fluctuations in the cosmic microwave background provide information about primordial inhomogeneities in the universe. However, the B-mode polarization of the inflationary gravitational wave is contaminated by the Galactic foreground polarized radiation arising from dust aligned by interstellar magnetic fields. To trace magnetic fields, we use the Velocity Gradient Technique (VGT), which employs modern understanding of the nature of magnetohydrodynamic turbulent motions. We apply the VGT to the high-resolution neutral hydrogen data from the GALFA-H I survey to predict the polarization of dust. We report that the predicted directions of dust polarization provide good correspondence with those reported by Planck 353 GHz. Using our maps of predicted polarization, we calculate the ratio of the E- and B-modes, and show that BB/EE ~ 0.53 ± 0.10, which is similar to the result from Planck polarization.…

Posted In: Astrophysics Seminar

Tue Oct 27, 2020

Astrophysics Seminar: Michelle Berg, University of Notre Dame

12:45 PM - 1:45 PM
zoom

Title TBA

Michelle Berg
Physics Graduate Student
University of Notre Dame…

Posted In: Astrophysics Seminar

Tue Nov 3, 2020

Astrophysics Seminar: Prof. Robin Shelton, University of Georgia

12:45 PM - 1:45 PM
zoom

Title TBA

Prof. Robin Shelton
University of Georgia

Hosted by Prof. Lehner

Posted In: Astrophysics Seminar

Tue Nov 10, 2020

Astrophysics Seminar: Prof. Daisuke Nagai, Yale University

12:45 PM - 1:45 PM
zoom

Title TBA

Prof. Daisuke Nagai
Yale University

Hosted by Prof. Howk

All interested persons are invited to attend remotely—email physics@nd.edu for information.…

Posted In: Astrophysics Seminar