This is a talk given at lunch time, usually in the conference room at noon.
Variability is a signature feature of young stars. Among the well known light curve phenomena
are periodic variations attributed to surface spots and irregular changes associated with
accretion or circumstellar disk material. While decades of photometric monitoring have
The introduction of a new generation of multi-object, near infrared spectrographs is already in the process of transforming our knowledge of the high-redshift universe.
The Andromeda galaxy (M31) provides a unique opportunity to study a large spiral galaxy and its stellar population in entirety. PTF has been monitoring M31 on a daily basis since 2009 with over 2400 images, making it possible to probe variability ("life") on timescales of hours to years.
Star-forming galaxies are widely believed to be the main drivers of hydrogen reionization.
QSOs are ubiquitous in the high-redshift universe, but the most luminous QSOs (L ~ 10^14 Lsun) are extremely rare even at the peak redshifts of black hole growth, 2 < z < 3.
Even in the modern era, only human eyes survey the entire optical sky for the violent, variable, and transient events that shape our universe. To change this, my collaborators and I have built and implemented the All-Sky Automated Survey for Supernovae (ASAS-SN).
The new VISTA Deep Extragalactic Observations (VIDEO) Survey is used to select a sample of radio-quiet quasars (RQQs), to depths ~4 magnitudes fainter than SDSS.
The circumgalactic medium contains signatures of key processes in galaxy formation such as gas accretion and outflow and may account for the majority of baryons in the Universe.