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2013 Hubble Fellows Webcasts
Wednesday Mar 6, 2013
2013 Hubble Fellows
Eric Tollerud  (Yale University )
What Are Local Group Satellites Trying to Tell Us about Cosmology? Dr. Erik Tollerud (Yale University) Local Group satellite galaxies are a unique testbed for both galaxy formation and LCDM. They allow us to probe the the lowest-luminosity extre ...
2013 Hubble Fellows
Linhua Jiang  (Arizona State University)
Physical Properties of Spectroscopically Confirmed Galaxies at z >= 6 Dr. Linhua Jiang (Arizona State University) I will present the rest-frame UV properties and morphology of the largest sample of spectroscopically confirmed galaxies at z >= 6. ...
2013 Hubble Fellows
Pascal Oesch  (University of California, Santa Cruz )
Probing the Dawn of Galaxies at z~9-12 Dr. Pascal Oesch (UC Santa Cruz) Over the last few years, the advent of the WFC3/IR camera on HST has completely revolutionized galaxy science in the reionization epoch, as it pushed the observational front ...
2013 Hubble Fellows
Mathew Walker  (Harvard College Observatory )
Follow the Energy Dr. Matthew Walker (Harvard College Observatory) Observations indicate that galactic dark matter halos differ structurally from the halos produced in dissipationless (Cold Dark Matter; 'CDM') cosmological N-body simulations. Ei ...
2013 Hubble Fellows
Ryan Quadri  (Carnegie Observatories )
What controls galaxy masses and star formation rates? Dr. Ryan Quadri (Carnegie Observatories) With current redshift surveys we are able to study the properties of nearly complete samples of galaxies across a wide range in redshift using uniform ...
2013 Hubble Fellows
Beth Reid  (Lawrence Berkeley National Lab )
Motion in the universe: large-scale flows and virialized motions of galaxies Dr. Beth Reid (Lawrence Berkeley National Lab) Redshift space distortions in spectroscopic galaxy maps provide a statistical measure of cosmic flows. The largest system ...
2013 Hubble Fellows
Steve Rodney  (Johns Hopkins University )
Chasing Type Ia Supernovae in the Early Universe Dr. Steven Rodney (Johns Hopkins University) Type Ia Supernovae (SNIa) are a cornerstone of modern cosmology. They provided the first direct evidence for the accelerating expansion of the universe ...
2013 Hubble Fellows
Sean Couch  (University of Chicago)
Three-Dimensional Simulations of Core-Collapse Supernovae Dr. Sean Couch (University of Chicago) I will discuss my recent work on 1D, 2D, and 3D hydrodynamical simulations of core-collapse supernovae including a parameterized neutrino heating an ...
2013 Hubble Fellows
Roman Shcherbakov  (University of Maryland )
A New Channel for Low-Luminosity GRBs: Tidal Disruptions of White Dwarfs by Intermediate Mass Black Holes Dr. Roman Shcherbakov (University of Maryland) Low-luminosity GRBs or X-ray flashes (XRFs), which often accompany supernovae, are typicall ...
2013 Hubble Fellows
James Steiner  (SAO )
Accretion Lags in Black-Hole Binary Systems Dr. James Steiner (Harvard-Smithsonian Center for Astrophysics) Accreting black hole binaries show strong correlation between X-ray and optical variability. In two systems, we find that X-rays lag behi ...
Tuesday Mar 5, 2013
2013 Hubble Fellows
Karoline Gilbert  (University of Washington)
Diffuse, extended stellar populations encode information about the earliest stages of a galaxy’s formation. The Andromeda galaxy is distant enough to facilitate global studies of its stellar halo, while being close enough to allow spectroscopic obser ...
2013 Hubble Fellows
Gurtina Besla  (Columbia University)
I will outline ongoing work to systematically quantify the rate of tidal interactions between dwarf galaxies in the local volume and the contribution of such interactions to modes of star formation in low metallicity environments and the baryon cycle ...
2013 Hubble Fellows
Xeuning Bai  (Smithsonian Astrophysical Observatory )
No description found.
2013 Hubble Fellows
Nathalie Degenaar  (University of Michigan)
Accretion onto supermassive black holes, and the associated feedback to their surroundings, lie at the foundation of their formation, growth and evolution, the chemical enrichment of the interstellar medium, galaxy evolution and the formation of larg ...
2013 Hubble Fellows
Jennifer Donley  (Los Alamos National Laboratory )
Spitzer IRAC selection is a powerful tool for identifying luminous AGN. The current set of IRAC AGN selection wedges, however, were defined for use in shallow surveys and are heavily contaminated by star-forming galaxies in the deep IRAC data now ava ...
2013 Hubble Fellows
Jeyhan Kartaltepe  (NOAO )
In the local universe, Ultraluminous Infrared Galaxies (ULIRGs, L_IR>10^12 L_sun) are all interacting and merging galaxies. To date, studies of ULIRGs at high redshift have found a variety of results due to their varying selection effects and small s ...
2013 Hubble Fellows
Robert Feldmann  (University of California, Berkeley )
Observations show that star formation in galaxies is closely correlated with the abundance of molecular hydrogen. However, systematics in the observational measurements and challenges in the theoretical modeling complicate a direct determination of ...
2013 Hubble Fellows
Michael McDonald  (Massachusetts Institute of Technology)
In the cores of galaxy clusters, the intracluster medium, if left undisturbed, should cool and condense onto the central most-massive galaxy, fueling substantial amounts of star formation. The fact that this is not observed in the local Universe is ...
2013 Hubble Fellows
Michele Fumagalli  (Carnegie Observatories )
Mapping the redshift distribution of the denser gas clouds in the distant universe - the so called Lyman limit systems - has important implications in diverse fields of cosmology, including studies of the UV extra-galactic background, of the cosmic m ...
2013 Hubble Fellows
Joshua Peek  (Columbia University )
Historically, early observations of neutral halo gas represented our first glimpse into our Galactic halo, but the significance of these high velocity clouds has remained elusive in the cosmic context. I will review the observational data we have col ...
2013 Hubble Fellows
Caitlin Casey  (University of Hawaii )
I will present recent results in far-infrared observations (from Herschel and SCUBA2) which shed new light on the origins of cosmic star formation and discuss the relation between these observations and more commonly studied optical and rest-frame ul ...
2013 Hubble Fellows
Mark Vogelsberger  (Harvard )
Over the last decades cosmological simulations of galaxy formation have significantly advanced and played a crucial role in enabling an understanding of the complicated processes underlying structure formation in the Universe. However, many relevant ...
2013 Hubble Fellows
Ryan Keisler  (University of Chicago )
After very briefly reviewing the latest measurement of the CMB power spectrum from the South Pole Telescope (SPT), I will describe a measurement of the relative velocities of galaxy clusters that will soon be made possible by combining mm-wave data f ...
2013 Hubble Fellows
Xin Liu  (UCLA )
The observed growth of galaxies suggests that massive black hole pairs and binaries on their way to merger should be common, yet direct evidence remains scant. Over the past few years, systematic searches, and in particular those using large spectros ...
2013 Hubble Fellows
Matthew McQuinn  (University of California, Berkeley )
I will discuss the use of cross-correlations between populations with poorly known redshifts and better known redshifts to improve the determination of the population redshift distribution of the former. This technique has a wide range of potential a ...
2013 Hubble Fellows
Daniel Perley  (Caltech )
One of the most exciting broader applications of the study of gamma-ray bursts is in better understanding the star-formation history of the Universe, especially at the highest redshifts. Long-duration GRBs are produced exclusively by massive, young ...
Monday Mar 4, 2013
2013 Hubble Fellows
Matt Mountain, Director STScI (STScI)
2013 Hubble Fellows
Henry Hsieh  (University of Hawaii)
Main-belt comets as tracers of ice in the inner solar system Dr. Henry Hsieh (University of Hawaii) As a recently recognized class of objects exhibiting apparently cometary (sublimation-driven) activity yet orbiting completely within the main a ...
2013 Hubble Fellows
Hilke Schlichting  (UCLA)
The Search for small Kuiper Belt Objects using the Hubble Space Telescope Dr. Hilke Schlichting (UCLA) The Kuiper Belt is a remnant of the primordial solar system located just beyond the orbit of Neptune. Studying the small body population in th ...
2013 Hubble Fellows
Markus Janson  (Princeton University)
Circumstellar Studies with SEEDS Dr. Markus Janson (Princeton University) Direct imaging is playing an increasingly important role in the study of exoplanets, and allows to study planets in environments that are unattainable by other means, such ...
2013 Hubble Fellows
Kaitlin Kratter  (University of Colorado)
The Architecture of Circumbinary Planetary Systems Dr. Kaitlin Kratter (JILA / CU Boulder) In the past year, Kepler has unveiled a new class of planetary systems: planets in orbit about main-sequence close binary star systems. These systems prov ...
2013 Hubble Fellows
Christiaan Ormel  (University of California, Berkeley )
No description fouCore formation: the importance of small particles Chris Ormel (UC Berkeley) Traditionally, it has been thought that bodies in the 100m to 100km size range -- customarily referred to as planetesimals -- are the building blocks o ...
2013 Hubble Fellows
John Tobin  (NRAO )
Observing and Characterizing Disks around the Youngest Protostars Dr. John Tobin (NRAO) The formation of proto-planetary disks begins during the earliest phase of the star formation process, while the nascent protostar is still surrounded by a d ...
2013 Hubble Fellows
Trent Dupuy  (Smithsonian Astrophysical Observatory )
Warm Spitzer Parallaxes of Cool Y Dwarfs Trent Dupuy (Smithsonian Astrophysical Observatory) Members of the new spectral class of Y dwarfs are estimated to have temperatures of ~300-400 K, colder than any previously known free-floating brown dwar ...
2013 Hubble Fellows
Jackie Radigan  (STScI)
Weather on Substellar Worlds: observations of cloud and weather phenomena in the atmospheres of cool brown dwarfs Jacqueline Radigan (STScI ) Recent observations of cool brown dwarfs in the time-domain have revealed large-amplitude variability ...
2013 Hubble Fellows
Leslie Rogers  (Caltech )
Which Sub-Neptune Exoplanets could have Liquid Water Oceans? Dr. Leslie Rogers (Caltech) The presence of liquid water has been hypothesized as an important ingredient for planet habitability. A sub-Neptune mass planet with a liquid water ocean b ...
2013 Hubble Fellows
Stella Offner  (Yale University )
Stellar Feedback and Its Impact on Molecular Clouds Dr. Stella Offner (Yale University) The most fundamental property of molecular clouds is that they are supersonically turbulent. The origin of the turbulence is unknown, although it is suspecte ...
2013 Hubble Fellows
Kohta Murase (Institute for Advanced Study )
Nonthermal Transients from Supernovae in Massive Circumstellar Material Dr. Kohta Murase (Institute for Advanced Study) Recent optical/infrared surveys have suggested that massive stars sometimes experience violent eruptions of circumstellar mat ...
2013 Hubble Fellows
Chun Ly  (STScI )
The Stellar and Interstellar Properties of Low-Mass Star-Forming Galaxies Chun Ly (STScI ) Star formation directly affects the surrounding interstellar medium (ISM) by replenishing it with gas, metals, and ionizing photons. As such, observables ...
2013 Hubble Fellows
Jo Bovy  (Institute for Advanced Study)
New measurements of the vertical mass distribution near the Sun Dr. Jo Bovy (Institute for Advanced Study) Measurements of the vertical mass distribution near the Sun can be used to constrain the relative contributions of stellar, gaseous, and d ...
2013 Hubble Fellows
Alis Deason  (University of California, Santa Cruz )
The Cold and Broken Milky Way Stellar Halo Dr. Alis Deason (UCSC) The phase-space structure of the Milky Way stellar halo is intimately linked to its accretion history. I will discuss the connection between the (broken) density profile of the st ...
2013 Hubble Fellows
Ralph Schonrich  (Ohio State University )
Assessing Galactic Rotation and Structure Ralph Schonrich (Ohio State University ) I will discuss different estimators to measure the rotation of Galactic components and show how they can be used together to control systematic biases in these mea ...
2013 Hubble Fellows
Yue Shen  (Carnegie Observatories )
Quasar Demography in Two-Dimension Dr. Yue Shen (Carnegie Observatories) I will present a demographic study of quasars in the BH mass-luminosity plane, using the largest and most homogenous quasar sample from the SDSS and our dedicated forward m ...
2013 Hubble Fellows
Daniel Stark  (University of Arizona )
Galaxies in the Reionization Era: New Insight from Gravitational Lensing Dr. Dan Stark (Arizona) Over the last several years, deep HST imaging campaigns have provided our first census of star formation activity in the reionization era. I will de ...