A 'Quick Look' at All-Sky Galactic Archeology with TESS: 158,000
  Oscillating Red Giants from the MIT Quick-Look Pipeline
  We present the first near all-sky yield of oscillating red giants from the
prime mission data of NASA's Transiting Exoplanet Survey Satellite (TESS). We
apply machine learning towards long-cadence TESS photometry from the first data
release by the MIT Quick-Look Pipeline to automatically detect the presence of
red giant oscillations in frequency power spectra. The detected targets are
conservatively vetted to produce a total of 158,505 oscillating red giants,
which is an order of magnitude increase over the yield from Kepler and K2 and a
lower limit to the possible yield of oscillating giants across TESS's nominal
mission. For each detected target, we report effective temperatures and radii
derived from colors and Gaia parallaxes, as well as estimates of their
frequency at maximum oscillation power. Using our measurements, we present the
first near all-sky Gaia-asteroseismology mass map, which shows global
structures consistent with the expected stellar populations of our Galaxy. To
demonstrate the strong potential of TESS asteroseismology for Galactic
archeology even with only one month of observations, we identify 354 new
candidates for oscillating giants in the Galactic halo, display the vertical
mass gradient of the Milky Way disk, and visualize correlations of stellar
masses with kinematic phase space substructures, velocity dispersions, and
$\alpha$-abundances.
