"Astronomers mark the change of seasons as the moment when the sun crosses over the celestial equator from the northern hemisphere of the sky to the southern hemisphere. This year the exact minute of the autumnal equinox is 3:21 p.m. Eastern Daylight Time on Sept. 22. At that moment, fall begins in the Northern Hemisphere and spring in the Southern. On the day of the equinox, an observer located on Earth’s equator will see the sun pass directly overhead at local noon. It also marks the beginning of six months of daylight at the South Pole and six months of nighttime at the North Pole."
View A Time-Lapse Video of the Equinox Here: http://videos.umass.edu/invideo/detail/videos/umass-in-video/video/55894...
The Thesis Defense will be held Wednesday, August 25, 2021 3:00pm via Zoom.
The propagation and evolution of cold galactic winds in galactic haloes is crucial to galaxy formation models. However, modeling of this process in hydrodynamic simulations of galaxy formation is over-simplified owing to a lack of numerical resolution and often neglects critical physical processes such as hydrodynamic instabilities and thermal conduction. In this thesis, I propose an analytic model, Physically Evolved Winds (PhEW), that calculates the evolution of individual clouds moving supersonically through a uniform ambient medium. The model reproduces predictions from very high resolution cloud-crushing simulations that include isotropic thermal conduction over a wide range of physical conditions. I also describe the implementation of this model into cosmological hydrodynamic simulations of galaxy formation as a sub-grid prescription to model galactic winds more robustly both physically and numerically.
It is with immense pleasure that we announce Dr. Alexandra Pope's promotion to Full Professor. Congratulations Prof. Pope!
Congratulations to Mount Holyoke College Professor Darby Dyar!
New research discloses details of violent phenomena in the center of our galaxy.
The Center for Teaching and Learning (CTL) announces the selection of the 2021-22 Lilly Fellows for Teaching Excellence.
Sinclaire's research focuses on studying the enigmatic population of dusty star-forming galaxies in the early Universe.
"The Goldwater Scholarship Program, one of the oldest and most prestigious national scholarships in the natural sciences, engineering,and mathematics in the United States, seeks to identify and support college sophomores and juniorswho show exceptional promise of becoming this Nation’s next generation of research leaders in these fields."
Kate is a Physics major with a concentration in Astronomy, who is working on a project to understand star formation in nearby galaxies.