Joint IAS Princeton University Astrophysics Colloquium
Protoplanetary Disk Structure and Young Planet Population
Recent ground based observations at various wavelengths reveal a
variety of protoplanetary disk structures. These disk structures
may help us to constrain the planet formation process. I will first
discuss how to apply the planet-disk interaction...
A NICER view of neutron stars
NICER, the Neutron Star Interior Composition Explorer, is an
X-ray telescope that was installed on the International Space
Station in 2017. Its mission is to study the nature of the densest
matter in the Universe, found in the cores of neutron stars...
The Nearby Universe - A Laboratory to Study the Cosmic Build-up of Dust and Metals in Galaxies
A key component of the baryon cycle in galaxies is the cycle of
metals between the gas and the dust phases in the neutral
interstellar medium (ISM). How this cycle depends on environment
(in particular metallicity and density) has important...
From galaxies to faces: recognizing the implications of Artificial Intelligence in astronomy and society
Artificial Intelligence (AI) refers to a set of techniques that
rely primarily on the data itself for the construction of a
quantitative model. AI has arguably been in development for three
quarters of a century, but there has been a recent...
Making Sense of Stellar Rotation in Low Mass Stars: Gyrochronology, Magnetism, and a Sun in Transition
Jennifer van Saders
Stellar rotation carries a wealth of information about stellar
populations. In particular, the technique of gyrochronology was
developed to utilize the spin-down of stars as a function of time
as an indicator of stellar age. Gyrochronology has the...
Probing Red Giants with Kepler
The frequencies of oscillations observed on a stellar surface
carry information about the properties of the stellar interior.
Asteroseismology, i.e., the unravelling of this information, has
made a huge leap thanks to the photometric observations...
Cosmology with Gravitational Lens Time Delays
Strong gravitational lenses with measured time delays between
the multiple images can be used to determine the Hubble constant
(H0) that sets the expansion rate of the Universe. An independent
determination of H0 is important to ascertain the...
Black Hole Physics at the Horizon Scale
Recent observational advances with the Event Horizon Telescope,
GRAVITY, and LIGO/VIRGO have opened up new avenues for studying
black hole physics at horizon scales. In this talk, I will discuss
what we have learned about the spacetimes of...
The Impact of Cosmic-Rays on Galaxy Formation
Relativistic cosmic-rays created by stellar and black hole
feedback may play an important role in many aspects of structure
formation. Cosmic-rays can drive outflows from star forming
galaxies and heat diffuse gas in the circumgalactic and...
The NASA Parker Solar Probe mission at the edge of the solar streamer belt
The physics of astrophysical coronal heating and the origin of the
solar wind remain compelling problems in heliospheric
physics, and plasma
astrophysics more generally. The NASA
Parker Solar Probe mission was
launched in late 2018 and...