Astronomy & Physics
Astronomy & Physics
Canadian Astronaut To Visit SMU
While visiting the Department of Astronomy and Physics at Saint Mary's Univeristy, Canadian Astronaut, Jeremy Hansen, will give a public talk (all are welcome) on Oct 5th at 7pm, in the Scotia Bank Theatre, Sobey School of Buisness, 923 Robie Street.
Jeremy Hansen (upside down, or is he?) and David Saint-Jacques falling toward the earth while inside a NASA C-9 aircraft that is also falling toward the earth. PHOTO CREDIT: Canadian Space Agency.
The masses of galaxies as determined from model fits to resolved images (used here as plotting points) compared to fits using unresolved (i.e., single pixel) images depends on the rate of star formation in the galaxy.
Ph.D. graduate student Bobby Sorba and Professor Sawicki improve mass estimates of galaxies.
Sorba and Dr. Sawicki's recent research paper (to be published in the Monthly Notices of the Royal Astronomical Society) shows that model fits to resolved images of galaxies produce similar mass estimates to model fits to unresloved images for galaxies but only for galaxies that have lower rates of internal star fromation. As the star formation rates increase, the masses derived from unresolved model fits are lower (presumably underestimated) compared to the model fits to the resolved images. Indeed, as they show in the figure above the trend is linear. Astronomers can can continue to estimate the masses of galaxies using unresolved images (necessary for faint galaxies such as high red shift galaxies) and then apply a simple correction to improve the mass estimate.
A Postdoctoral Research Fellow position in experimental nuclear physics, at TRIUMF, Canada with Professor Rituparna Kanungo is available. For more information: IRIS_Postdoc_2015.
Improving mass estimates of galaxies
Ph.D. graduate student Sorba and his research supervisor Dr. Sawicki's publish research on galaxy masses in MNRAS.
PhD candidate Liz Arcilia-Osejo is interviewed on CTV's Live at 5 about her research on dead galaxies.
Prof. Gallo leads Astro-H
Prof. Gallo leads Canadian contribution to X-ray telescope.
In Memoriam of Dr William Lonc
Fr. Dr. William P. Lonc, S.J. died on November 27, 2014; he was 84 years old.
Best Undergraduate Science Paper
Logan Francis wins award for science project on physical random number generators.
Meet and Greet with Astronaut Hansen
Canadian Astronaut Jeremy Hansen
Adaptive Mesh Chemodynamical Simulations and Synthetic Observations
Mr. Ben Thompson (University of Central Lancashire, SMU)
Dr. Kim Venn (University of Victoria)
The mysterious origins of the heaviest elements
Dr. Rebecca Surman (University of Notre Dame)
Dr. Alex Fillippenko (University of California, Berkeley)