Astronomy Colloquia

From pebbles to planets

Speaker: 
Katherine Kretke (Southwest Research Institute, Boulder, Colorado)
Event Date and Time: 
Mon, 2016-11-28 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Jaymie Matthews
Intended Audience: 
Graduate
In recent years there has been a radical shift in the thinking about small-body and planet formation. Particles with stopping times comparable to their orbital times, often called "pebbles" (although they may range from sub-centimeter to almost meters in size), interact with gaseous protoplanetary disks in very special ways.

The Milky Way Galaxy: Inferring the dark matter from the light

Speaker: 
Gwendolyn Eadie (McMaster University)
Event Date and Time: 
Mon, 2016-09-12 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Jaymie Matthews
Intended Audience: 
Graduate
Although there is consensus that the Galaxy's mass is dominated by its dark matter halo, the exact value of its mass is poorly constrained. The underlying reason for this is that there are serious challenges associated with using the motions of tracer particles like globular clusters or halo stars to deduce the mass profile; the 3D velocity measurements are often incomplete and uncertain, and there are only a few GCs at large distances from the Galactic center.

The Hubble constant in the era of precision cosmology

Speaker: 
Lucas Macri (Texas A&M University)
Event Date and Time: 
Mon, 2016-09-26 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Jaymie Matthews
Intended Audience: 
Graduate
Having settled the decades-long bitter debate over the value of the Hubble constant, research on the Extragalactic Distance Scale has seen a remarkable transformation over the past decade. The focus is now on a proper accounting of all sources of uncertainty (specially systematics) and the development of new techniques to further increase the accuracy and precision in the measurement of H_0 . What is the motivation for further work on the Hubble constant?

Modeling gas–dust interactions in debris disks

Speaker: 
Alex Richert (Penn State University)
Event Date and Time: 
Mon, 2016-04-11 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Aaron Boley and Jaymie Matthews
Intended Audience: 
Graduate
The discovery of debris disks with gas has raised the question of whether gas–dust interactions shape global disk structure, which has implications for the detectability of embedded planets, as well as the distribution of volatiles in young planetary systems. Observed dust-to-gas ratios of order unity in some debris disks suggest that the dust, unlike in protoplanetary disks, is hydrodynamically important, yet this regime remains largely unexplored in the literature.

EASTER MONDAY - UBC CLOSED - NO ASTRONOMY COLLOQUIUM

Event Date and Time: 
Mon, 2016-03-28 15:30 - 16:45
Location: 
Not Hennings 318 (or anywhere, for that matter).

UBC STUDY BREAK (a.k.a. Reading Week) - No Astronomy Colloquium today

Event Date and Time: 
Mon, 2016-02-15 15:30 - 16:45
Location: 
Not Hennings 318 (or anywhere, for that matter).

BC FAMILY DAY HOLIDAY - UBC closed - No Astronomy Colloquium

Event Date and Time: 
Mon, 2016-02-08 15:30 - 16:45
Location: 
Not Hennings 318 (or anywhere, for that matter).

NO ASTRONOMY COLLOQUIUM TODAY

Speaker: 
Come next week for our own Alex Mead
Event Date and Time: 
Mon, 2016-01-25 15:30 - 16:45
Location: 
Not Hennings 318 (or anywhere, for that matter).
Local Contact: 
Jaymie Matthews (to blame for not recruiting someone for this date)

Hungry Black Holes & Some Adventures in Physics Education

Speaker: 
Linda Strubbe (UBC Physics & Astrnomy)
Event Date and Time: 
Mon, 2016-02-29 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Jaymie Matthews
Intended Audience: 
Graduate
A star that wanders too close to a massive black hole gets shredded by the black hole's tidal gravity, releasing a flare of energy as stellar gas accretes. How often this occurs is uncertain at present, as is the physics of such rapid accretion. Excitingly, in just the last few years, new transient surveys have started finding and following up tidal disruption event candidates in real time.

The Environment of an Unusual Starless Galactic Center Molecular Cloud

Speaker: 
Betsy Mills (Jansky Fellow, University of Arizona and Steward Observatory)
Event Date and Time: 
Mon, 2016-03-21 15:30 - 16:45
Location: 
Hennings 318
Local Contact: 
Jaymie Matthews
Intended Audience: 
Graduate
The giant molecular cloud G0.253+0.016 or "The Brick" is a massive (M~10^5 solar masses) cloud in the Galactic center. Its apparent lack of star formation given its large mass makes it unique in our Galaxy, and as such it has been the subject of more than a dozen papers in just the last 3 years. The properties of this cloud are being used to understand everything from the quiescent initial stages of massive star formation to the overall evolution and orbit of clouds in the entire Galactic centre. However, its physical conditions and environment are still poorly constrained.
Syndicate content
Website development by Checkmark Media. Designed by Armada.

a place of mind, The University of British Columbia

Faculty of Science
Department of Physics and Astronomy
6224 Agricultural Road
Vancouver, BC V6T 1Z1
Tel 604.822.3853
Fax 604.822.5324

Emergency Procedures | Accessibility | Contact UBC | © Copyright The University of British Columbia