Event Time: Monday, February 24, 2020 | 3:00 pm - 4:00 pm
Event Location:
Hennings 318
Add to Calendar 2020-02-24T15:00:00 2020-02-24T16:00:00 Interstellar asteroids and comets: planetary dynamics meets galactic dynamics Event Information: In 2017, the first asteroid to enter our Solar System from interstellar space was discovered at the Pan-STARRS telescope in Hawaii, and has now been named 'Oumuamua, a Hawaiian term which signifies 'Messenger from Afar'. In 2019 a second interstellar visitor, comet Borisov (named after its discoverer) appeared. Curiously, they have contrasting properties: 'Oumuamua is rocky and relatively slow (both unexpected beforehand) while Borisov is the reverse: icy and fast. Much could be learned about this new class of object if we knew their sources and/or the mechanism(s) by which they are produced, both of which are uncertain. I'll outline some of the efforts being made to back-track these puzzling visitors to their points of origin, somewhere within our Milky Way galaxy. Event Location: Hennings 318
Event Time: Monday, March 2, 2020 | 3:00 pm - 4:00 pm
Event Location:
Hennings 318
Add to Calendar 2020-03-02T15:00:00 2020-03-02T16:00:00 Clash of the Titans: Galaxy mergers in the nearby Universe Event Information: Astronomy's current model of galaxy evolution is built on a foundation of hierarchical growth, in which small galaxies merge together to form larger ones.  In addition to the simple accrual of mass, this merging process is predicted to fundamentally change the galaxies’ properties, such as dramatic morphological transformations, the triggering of bursts of star formation and high rates of accretion onto the central supermassive black hole.  In this talk I will explain the physical processes behind these predictions, and present the observations that we are performing in order to test the theory.  Although many of the predictions are indeed borne out by experiment, there have been some surprising conflicts as well, that demand revisions to our models of how mergers shape galaxy evolution. Event Location: Hennings 318
Event Time: Monday, March 9, 2020 | 3:00 pm - 4:00 pm
Event Location:
Hennings 318
Add to Calendar 2020-03-09T15:00:00 2020-03-09T16:00:00 New Probes of Black Hole Variability Event Information: I will discuss the power of new observations of variable black holes (supermassive and stellar mass systems) to probe their growth and evolution. I will touch on our Milky Way's black hole Sgr A*, the Virgo cluster's M87, changing-look quasars, the multitude of systems now being discovered by LIGO/Virgo, and briefly explore how we can continue to push this frontier with a next generation of observatories. Event Location: Hennings 318
Event Time: Monday, March 16, 2020 | 3:00 pm - 4:00 pm
Event Location:
Hennings 318
Add to Calendar 2020-03-16T15:00:00 2020-03-16T16:00:00 TBD Event Location: Hennings 318
Event Time: Monday, March 23, 2020 | 3:00 pm - 4:00 pm
Event Location:
Hennings 318
Add to Calendar 2020-03-23T15:00:00 2020-03-23T16:00:00 TBD Event Location: Hennings 318