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Science Colloquia Webcasts
Wednesday Nov 15, 2017
2017 Fall Science Colloquia
Wendy Freedman (University of Chicago)
Resolving the Tension in the Hubble Constant The accuracy with which we can measure the Hubble constant, Ho has been steadily increasing over the past decade. The direct and traditional means to measure Ho is based on measurement of distances and ...
Wednesday Nov 8, 2017
2017 Fall Science Colloquia
Mariska Kriek (University of California-Berkeley)
In past years, large and deep photometric and spectroscopic surveys have significantly advanced our understanding of galaxy growth, from the most active time in the universe (z~2) to the present day. In particular, the evolution in stellar mass, star ...
Friday Oct 6, 2017
STScI Astrobiology Lecture Series
David Grinspoon (Planetary Science Institute)
Informed by comparative planetology and a survey of the major episodes in Earth history, this lecture will offer taxonomy of planetary catastrophes meant to illuminate the unusual nature of the “Anthropocene”, the current era of human-driven planetar ...
Wednesday Oct 4, 2017
2017 Fall Science Colloquia
Megan Donahue  (Michigan State University )
One of the biggest challenges to understanding how galaxies work is decoding the role of the central supermassive black hole. Without feedback from the black hole (“AGN feedback”), galaxy evolution models fail to produce realistic massive galaxies an ...
Wednesday Sep 20, 2017
2017 Fall Science Colloquia
Raffaella Margutti (Northwestern University)
Observations are drawing a complex picture of the latest stages of massive stars evolution and their explosions. In this seminar I concentrate on two among the least understood aspects of stellar evolution, adopting an observational perspective: How ...
Wednesday Sep 13, 2017
2017 Fall Science Colloquia
Mark Devlin (University of Pennsylvania)
Researchers have been utilizing the measurements of the Cosmic Microwave Background (CMB) for the last several decades to study the birth and evolution of our Universe. I will review the science behind the CMB and describe how we extract cosmologica ...
Wednesday Sep 6, 2017
2017 Fall Science Colloquia
Geronimo Luis Villanueva (Goddard Space Flight Center)
We recently established that Mars lost an ocean’s worth of water, while the Curiosity rover has recently detected organics on the Martian surface and in the atmosphere. If Mars had a rich chemical and diverse past, how much of these biomarkers were l ...
Friday Sep 1, 2017
Special Presentations
Kevin Heng  (University of Bern Center for Space and Habitability)
No description found.
Wednesday Aug 30, 2017
2017 Hot Sci @ STScI
Bradley Peterson (Space Telescope Science Institute)
The Large Ultraviolet, Optical, and Infrared Surveyor (LUVOIR) is one of the future mission concepts identified in the NASA Astrophysics Roadmap of 2014. NASA is currently funding studies of four such missions with the intent of identifying the scien ...
2017 Hot Sci @ STScI
Kirill Tchernyshyov  (JHU)
There is general agreement that the ISM of the Milky Way is arranged into a spiral-like pattern of some sort, though there is not yet agreement on how regular this spiral-like pattern is or how it evolves. To investigate this and other questions rela ...
Wednesday Aug 23, 2017
2017 Hot Sci @ STScI
Dominika Wylezalek (JHU)
Feedback from accreting supermassive black holes is now a standard ingredient in galaxy formation models. But while many compelling models of AGN feedback exist, there is no clear data-driven picture of how AGN-driven winds are launched, how they pro ...
2017 Hot Sci @ STScI
Ben Sargent  (Space Telescope Science Institute)
The asymptotic giant branch (AGB) phase is one of the last phases of a star’s life. AGB stars lose mass in an outflow in which dust condenses and is pushed away from the star. Extreme AGB stars are so named because their very red colors suggest ver ...
Wednesday Aug 16, 2017
2017 Hot Sci @ STScI
Mattia Libralato (STScI)
No description found.
2017 Hot Sci @ STScI
Bram Ochsendorf  (STScI)
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Wednesday Aug 9, 2017
2017 Hot Sci @ STScI
Tea Temim (STScI)
A subclass of supernova remnants (SNRs) produced by core-collapse supernova (SN) explosions contain pulsars that generate winds of synchrotron emitting relativistic particles. The evolution of these pulsar wind nebulae (PWNe) is closely coupled to th ...
2017 Hot Sci @ STScI
Tony Sohn  (Space Telescope Science Institute)
The globular cluster (GC) system of the Milky Way (MW) provides important information on the MW’s present structure and past evolution. GCs in the halo are particularly useful tracers; because of their long dynamical timescales, their orbits retain i ...
Wednesday Aug 2, 2017
2017 Hot Sci @ STScI
Frank Summers  (STScI)
No description found.
2017 Hot Sci @ STScI
Peter Zeidler (STScI)
No description found.
Wednesday Jul 26, 2017
2017 Hot Sci @ STScI
Kailash Sahu  (STScI)
No description found.
2017 Hot Sci @ STScI
Vicente Rodriguez-Gomez  (STScI)
No description found.
Wednesday Jul 19, 2017
2017 Hot Sci @ STScI
William Fischer (Space Telescope Science Institute)
In the protostellar phase, low-mass stars assemble most of their ultimate main-sequence masses from infalling envelopes. A major open question is whether the primary mode of protostellar mass accretion is gradual, featuring slow changes in the infall ...
2017 Hot Sci @ STScI
Michael Crosley  (Space Telescope Science Institute)
One factor important to habitability is the impact of stellar eruptive events on nearby exoplanets. Currently this is poorly constrained due to heavy reliance on solar scaling relationships and a lack of experimental evidence. Low frequency dynamic ...
Wednesday Jul 12, 2017
2017 Hot Sci @ STScI
Mia Bovill (STScI)
No description found.
2017 Hot Sci @ STScI
Joleen Carlberg (STScI)
No description found.
Wednesday May 31, 2017
2017 Spring Science Colloquia
Jim Fuller (California Institute of Technology))
Internal stellar magnetic fields are inaccessible to direct observations and little is known about their amplitude, geometry and evolution. I will discuss how strong magnetic fields in the cores of red giant stars can be identified with asteroseismol ...