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Event Date Summary
Astronomy Colloquium: Daniela Calzetti Thu. April 13th, 2017
2:30 pm-3:30 pm

The Scales of Star Formation – Insights from the UV
Daniela Calzetti (UMass)
Over two decades of observations from the Ultraviolet to the Infrared with a host of space missions, including the HST, Spitzer, Herschel, GALEX, etc. …Read more.

Astronomy Colloquium: Jay Strader Wed. March 22nd, 2017
3:00 pm-4:00 pm

Black Holes in Globular Clusters
Jay Strader (Michigan State University)
Hundreds of stellar-mass black holes form in the early lifetime of a typical globular star cluster. But, unlike the case for neutron stars, no bright X-ray binaries containing black holes have been observed in globular clusters, which led to theoretical predictions that most or all of the black holes should be efficiently ejected through dynamical interactions. …Read more.

Astronomy Colloquium: Chris Impey Thu. March 9th, 2017
2:30 pm-3:30 pm

Science Literacy in the MOOC Era
Chris Impey (Arizona)
In a world shaped by science and technology, the persistently low level of science literacy of the general
public is a cause for concern. …Read more.

Astronomy Colloquium: Ian Roederer Wed. March 1st, 2017
3:00 pm-4:00 pm

Heavy Metals from the First Stars to Today
Ian Roederer (UMichigan)
NASA’s Cosmic Origins program aims to address the question, “How did we get here?”  My work addresses this question through three broad themes: the nature of the first stars, the formation and evolution of the Milky Way and Local Group, and the origin of the elements.  …Read more.

Astronomy Colloquium: Nelson Padilla Tue. February 21st, 2017
2:00 pm-3:00 pm

Angular momentum in galaxy formation simulations
Nelson Padilla (U Catolica de Chile)
In this talk I will present studies on the evolution of the angular momentum of galaxies in the EAGLE simulation where we try and identify the mechanisms that contribute to the growth of their angular momentum, including smooth mass accretion, mergers, and mergers with different degrees of alignment with the galaxy’s angular momentum.  …Read more.

Astronomy Colloquium: Steinn Sigurdsson Wed. February 15th, 2017
3:00 pm-4:00 pm

How black holes get their kicks: dynamical evolution and coalescence
Steinn Sigurdsson (Penn State U)
Recent observations have increased interest in the possibilities of a significant population of black hole binaries in the local universe. …Read more.

Astronomy Colloquium: Laura Lopez Wed. January 25th, 2017
3:00 pm-4:00 pm

Observational Assessment of Stellar Feedback in Nearby Galaxies
Laura Lopez (Ohio State U)
Massive stars have a profound astrophysical influence throughout their tumultuous lives and deaths. Stellar feedback – the injection of energy and momentum by stars to the interstellar medium (ISM) – occurs through a variety of mechanisms: radiation, photoionization heating, winds, jets/outflows, supernovae, and cosmic-ray acceleration. …Read more.

Astronomy Colloquium: Michael Skrutskie Fri. December 9th, 2016
11:00 am-12:00 pm

Diffraction-limited Mid-Infrared Imaging with the 23-meter Large Binocular Telescope
Michael Skrutskie (Virginia)
While the world awaits the construction of the Giant Magellan Telescope, Thirty Meter Telescope, and the European Extremely Large Telescope, the Large Binocular Telescope (LBT) at Mt. …Read more.

Astronomy Colloquium: Monica Valluri Wed. November 30th, 2016
3:00 pm-4:00 pm

Using the Stellar Halo to Probe the Assembly of the Milky Way
Monica Valluri (U Michigan)
Over the next decade there will be an explosion of high quality kinematical data on hundreds of millions of stars in the Milky Way’s stellar halo. …Read more.

Astronomy Colloquium: Kelly Holley-Bockelmann Thu. November 10th, 2016
2:30 pm-3:30 pm

Building Supermassive Black Hole Binaries
Kelly Holley-Bockelmann (Vanderbilt)

Astronomers now know that supermassive black holes reside in nearly every galaxy. Though these black holes are an observational certainty, nearly every aspect of their evolution — from their birth, to their fuel source, to their basic dynamics — is a matter of lively debate. …Read more.

Astronomy Colloquium: Ed Moran Wed. October 26th, 2016
3:00 pm-4:00 pm

AGN unification: the hidden truth
Ed Moran (Wesleyan U)
Seyfert galaxies have been traditionally classified into two groups based on the presence (type 1) or absence (type 2) of broad permitted emission lines in their optical spectra.  …Read more.

Astronomy Colloquium: Doug Hamilton Fri. October 14th, 2016
11:00 am-12:00 pm

The Origin of Titan and Hyperion
Doug Hamilton (Maryland)
Titan is arguably the Solar System’s most unusual satellite. It is fifty times more massive than Saturn’s other moons and is the only satellite with a substantial atmosphere. …Read more.

Astronomy Colloquium: Bill Janesh Wed. September 28th, 2016
3:00 pm-4:00 pm

Needles in a Haystack: Searching for Optical Counterparts to Ultra-compact High Velocity HI Clouds
Bill Janesh (Indiana University)
Low mass galaxies, and particularly those with recent or active star formation, are excellent laboratories to answer questions about galaxy formation and evolution. …Read more.

Astronomy Colloquium: James Bullock Wed. April 13th, 2016
11:00 am-12:00 pm

Cosmology and the Local Group
James Bullock (UCalifornia, Irvine)
The Local Group and the tiny galaxies that surround the Milky Way provide unique and detailed data sets for testing ideas in cosmology and galaxy formation. …Read more.

Astronomy Colloquium: Hongsheng Zhao Mon. April 11th, 2016
11:00 am-12:00 pm

New Physics Beyond Galaxies
Hongsheng Zhao (University of St Andrews)
I will show how current data on galaxies and clusters could be used to constrain the new physics of dark matter and relativity.   …Read more.

Astronomy Colloquium: Elena D’Onghia Wed. March 30th, 2016
11:00 am-12:00 pm

The Structure and Dynamics of the Milky Way Stellar Disk
Elena D’Onghia (U Wisconsin)
Ongoing surveys are revolutionizing our understanding of Galaxy dynamics. At the same time, advances in computational cosmology have led to improved predictions for the properties of galaxies in the LCDM theory. …Read more.

Astronomy Colloquium: Kevin Stevenson Wed. March 16th, 2016
11:00 am-12:00 pm

Today’s Exo-Weather Forecast: Hot and Humid with a Chance of Clouds
Kevin Stevenson (Chicago)
Planet-finding surveys have revealed thousands of confirmed exoplanets and candidates awaiting verification.  Many of these objects were discovered indirectly using the transit technique, which is a powerful tool that has transformed our understanding of planetary system architecture.  …Read more.

Astronomy Colloquium: Kathryn Johnston Thu. March 3rd, 2016
3:00 pm-4:00 pm

Dark Matter and Stellar Halos around Galaxies:  Formation, Histories and Structure
Kathryn Johnston, Columbia University
The existence of spectacular low-surface-brightness features – remnants of past mergers – surrounding many galaxies has been known about for many decades.  …Read more.

Joint Phys/Astro Colloquium: John Monnier (Cancelled) Thu. February 25th, 2016
4:15 pm-5:15 pm

Cancelled due to inclement weather.

Astronomy Colloquium: Adam Leroy Wed. February 17th, 2016
11:00 am-12:00 pm

Star Formation-Driven Molecular Superwinds as Understood From the Two Nearest Starburst Galaxies (and a Small Survey)
Dr. Adam Leroy, Ohio State University
I will use the two nearest starburst galaxies: M82 and NGC 253 as examples to discuss the origin and fate of galaxy-scale molecular outflows driven by star formation. …Read more.

Astronomy Colloquium: Tony Sohn Wed. February 3rd, 2016
11:00 am-12:00 pm

Dynamics of Local Group Galaxies via HST Proper Motions
Tony Sohn (Johns Hopkins U)
The Universe evolves hierarchically with small structures merging and falling in to form bigger structures. …Read more.

Astronomy Colloquium: Kristen McQuinn Wed. January 13th, 2016
11:00 am-12:00 pm

Leo P: Galaxy Evolution at the Faint-end of the Luminosity Function
Kristen McQuinn (University of Texas, Austin)
Theories of galaxy evolution have been tested by our a growing knowledge of low-mass galaxies. …Read more.

Astronomy Colloquium: Edo Berger Thu. December 10th, 2015
3:00 pm-4:00 pm

Short-Duration Gamma-Ray Bursts and the Electromagnetic Counterparts of Gravitational Wave Sources
Edo Berger (Harvard)
Gamma-ray bursts are the most luminous and energetic explosions known in the universe.  They appear in two varieties:  long- and short-duration.  …Read more.

Astronomy Colloquium: Kevin Croxall Wed. December 2nd, 2015
11:00 am-12:00 pm

Oxygen in the Local Universe: Establishing Order through CHAOS
Kevin Croxall (OSU)
The metal content of a galaxy is one of the most important properties used
to distinguish between viable evolutionary scenarios and strongly influences
many of the physical processes in the ISM. …Read more.

Astronomy Colloquium: Jennifer Johnson Thu. November 12th, 2015
3:00 pm-4:00 pm

The Secret Lives of Stars: Galactic History from the APOGEE Survey
Jennifer Johnson (Ohio State University)
The history of a galaxy can be traced through its stars: their compositions, their ages, and their motions. …Read more.

Astronomy Colloquium: Benoit Famaey Wed. October 21st, 2015
11:00 am-12:00 pm

Galactoseismology in the Milky Way
Benois Famaey, CNRS/Strasbourg

Current Galactic dynamical models still often rely on the zeroth order assumptions of a smooth time-independent and axisymmetric gravitational potential. First order perturbed models are those trying to isolate the effects of one main perturber, such as the bar or the spiral arms. …Read more.

Astronomy Colloquium: Frank Summers Wed. October 14th, 2015
11:00 am-12:00 pm

Frank Summers (STScI)
Truth and Beauty in Astronomy Visualization
The presentation of complex scientific ideas demands both precision and detail. The interpretation of even graphical representations generally requires specialized knowledge. …Read more.

Astronomy Colloquium: Gail Zasowski Wed. September 30th, 2015
11:00 am-12:00 pm

Gail Zasowski (Johns Hopkins University)
New Tools for Galactic Archaeology from the Milky Way
One of the critical components for understanding galaxy evolution is understanding the Milky Way Galaxy itself — its detailed structure and chemodynamical properties, as well as fundamental stellar physics, which we can only study in great detail locally.  …Read more.

Astronomy Colloquium: David Merritt Wed. September 9th, 2015
11:00 am-12:00 pm

How Things Get Into (Supermassive) Black Holes
David Merritt, Rochester Institute of Technology

Gas near the center of a galaxy can find its way into the central black hole without much difficulty, but stars need to be nudged. …Read more.

Astronomy Colloquium: Michelle Collins Wed. September 2nd, 2015
11:00 am-12:00 pm

The faintest galaxies as probes of cosmology and galactic evolution
Michelle Collins (Yale)
As the faintest galaxies we are able to observe in the Universe, the dwarf spheroidals can be thought of as the fundamental galactic unit. …Read more.

Dynamical Evolution of Very Young Stellar Sub-Cluster Fri. April 17th, 2015
11:00 am-1:00 pm

Dynamical Evolution of Very Young Stellar Sub-Clusters
Alison Sills, McMaster University
Recent observations of massive, young, nearby star-forming complexes are starting to probe the detailed structure of newly-forming star clusters. …Read more.

Adventures in Data Science: An Astronomer Takes the Road Ever-More-Often Traveled By Wed. April 1st, 2015
11:00 am-1:00 pm

Adventures in Data Science: An Astronomer Takes the Road Ever-More-Often Traveled By
Craig Rudick, University of Kentucky
About two years ago I left my Astronomy postdoc position for a job in the “real” world. …Read more.

Interpreting Dwarf Galaxy Observations with Realistic Simulations Wed. March 18th, 2015
11:00 am-1:00 pm

Interpreting Dwarf Galaxy Observations with Realistic Simulations
Alyson Brooks, Rutgers University
The cosmological model based on cold dark matter (CDM) and dark energy has been hugely successful in describing the observed evolution and large scale structure of our Universe. …Read more.

The First Stars and Galaxies: The Run-up to the JWST Wed. March 4th, 2015
11:00 am-1:00 pm

The First Stars and Galaxies: The Run-up to the JWST
Volker Bromm, University of Texas, Austin
How and when did the cosmic dark ages end? I discuss the physics of how the first stars and galaxies formed, within the context of cosmological structure formation. …Read more.

What do the smallest galaxies tell us about dark matter? Wed. February 11th, 2015
11:00 am-1:00 pm

What do the smallest galaxies tell us about dark matter?
Matt Walker, Carnegie Mellon University
I will discuss how to translate stellar kinematics observed in the nearest, smallest and and ‘darkest’ galaxies into a test of the standard hypothesis that dark matter consists of ‘cold’ and ‘collisionless’ (i.e., weakly interacting) particles. …Read more.

Orion as a Laboratory of Protostellar Evolution: Results from the Herschel Orion Protostar Survey Wed. February 4th, 2015
11:00 am-1:00 pm

Orion as a Laboratory of Protostellar Evolution: Results from the Herschel Orion Protostar Survey
Tom Megeath, University of Toledo
The Orion molecular clouds are a remarkable laboratory for studying star formation across the mass spectrum and across the full range of environments in which stars form, from crowded clusters containing massive stars to relatively isolated low mass star formation. …Read more.

Mercury: New views from MESSENGER Wed. January 21st, 2015
11:00 am-1:00 pm

Mercury: New views from MESSENGER
Steve Hauck, Earth, Environmental, and Planetary Sciences, CWRU
More than 35 years after Mariner 10 made its third and final flyby of the planet Mercury MESSENGER (short for MErcury, Surface, Space ENvironment, GEochemistry, and Ranging) became the first spacecraft to orbit the planet in March of 2011. …Read more.

Probing Cosmic Acceleration with the Dark Energy Survey Thu. December 11th, 2014
4:00 pm-5:00 pm

Probing Cosmic Acceleration with the Dark Energy Survey
Josh Frieman, University of Chicago / FermiLab
The Nobel Prize in Physics for 2011 was awarded for the discovery that the expansion of the Universe is accelerating. …Read more.

Globular Cluster Streams as Galactic High-Precision Scales Wed. November 19th, 2014
11:00 am-1:00 pm

Globular Cluster Streams as Galactic High-Precision Scales
Andreas Küpper, Columbia University
Tidal streams are promising probes of the gravitational potential of the Milky Way and of the clumsiness of its dark-matter halo. …Read more.

Choose Your Own Adventure: Multiplicity of Planets among the Kepler M Dwarfs Wed. November 12th, 2014
11:00 am-1:00 am

Choose Your Own Adventure: Multiplicity of Planets among the Kepler M Dwarfs
Sarah Ballard, University of Washington
The Kepler data set has furnished more than 130 exoplanetary candidates orbiting M dwarf hosts, nearly half of which reside in multiply transiting systems. …Read more.

A Tale of Three Neutrinos Wed. October 29th, 2014
11:00 am-1:00 am

A Tale of Three Neutrinos
Derek Fox, Penn State University
I will discuss recent work to identify the brightest sources of high-energy (e_nu > TeV) neutrinos in the cosmos, those amenable to detection by IceCube, ANTARES, and other high-energy neutrino facilities. …Read more.

Do astronomical data contradict the existence of dynamically relevant particle cold or warm dark matter? Wed. October 8th, 2014
11:00 am-1:00 pm

Do astronomical data contradict the existence of dynamically relevant particle cold or warm dark matter?
Pavel Kroupa, University of Bonn
The dual-dwarf-galaxy theorem, according to which two types of galaxies must exist and which must be true in the standard model of cosmology, appears to be ruled by astronomical data: both types of dwarf galaxy, those with putative exotic dark matter and those known to not contain dark matter even if it were to exist, cannot be distinguished by observation. …Read more.

Lifting the Dusty Veil: Understanding the Stellar Structure of Spiral Disks Fri. September 26th, 2014
12:30 pm-2:30 pm

Lifting the Dusty Veil: Understanding the Stellar Structure of Spiral Disks
Andrew Schechtman-Rook, University of Wisconsin
Measuring the vertical distribution of starlight in spiral galaxies can give valuable insights on both the formation and growth of these complex systems. …Read more.

Astrophysics’ Extreme Matter Experiments: Understanding the Diagnostics Wed. September 17th, 2014
11:00 am-1:00 pm

Astrophysics’ Extreme Matter Experiments: Understanding the Diagnostics
Chris Fryer Los Alamos National Lab
Astrophysical Transients (supernovae, gamma-ray bursts, kilanovae, …) are often hailed as ideal laboratories to study matter at high temperatures and nuclear densities. …Read more.

Testing Galaxy Formation with Clustering Statistics and ΛCDM Halo Models at z=0-1 Wed. September 10th, 2014
11:00 am-1:00 pm

Testing Galaxy Formation with Clustering Statistics and ΛCDM Halo Models at z=0-1
Ramin Skibba, UC San Diego
Galaxies form and evolve in particular environments of the cosmic web, which consists of a variety of filaments and knots, as well as voids and underdense regions. …Read more.

Page last modified: May 29, 2015