Herschel Observations of Disks around Late-type Stars
  A set of twenty late-type (K5-M5) stars were observed with the Herschel Space
Observatory at 100 and 160 microns with the goal of searching for far-infrared
excesses indicative of the presence of circumstellar disks. Out of this sample,
four stars (TYC 7443-1102-1, TYC 9340-437-1, GJ 784 and GJ 707) have infrared
excesses above their stellar photospheres at either 100 or 160 micron or both.
At 100 microns TYC 9340-437-1 is spatially resolved with a shape that suggests
it is surrounded by a face-on disk. The 100 micron excess flux associated with
GJ 707 is marginal at around 3sigma. The excess flux associated with GJ 784 is
most likely due to a background galaxy as the dust radius estimated from the
spectral energy fit implies that any associated dust disk should have been
resolved in the Herschel images but is not. TYC 7443-1102-1 has been observed
with ALMA which resolves the emission at its location into two distinct sources
making the Herschel excess most likely also due to a background galaxy. It is
worth noting that this star is in the 23 Myr old beta Pic association. With a
disk luminosity on the order of 10^-3 L*, this system is an ideal follow-up
target for high-contrast imaging and ALMA.
