  HST images of proplyds in the Orion Nebula, as well as submillimeter/radio
measurements, show that the dominant O7 star Theta1 Ori C photoevaporates
nearby disks around pre-main sequence stars. Theory predicts that massive stars
photoevaporate disks within distances of order 0.1 pc. These findings suggest
that young, OB-dominated massive H II regions are inhospitable to the survival
of protoplanetary disks, and subsequently to the formation and evolution of
planets. In the current work, we test this hypothesis using large samples of
pre-main sequence stars in 20 massive star-forming regions selected with X-ray
and infrared photometry in the MYStIX survey. Complete disk destruction would
lead to a deficit of cluster members with excess in JHKs and Spitzer/IRAC bands
in the vicinity of O stars. In four MYStIX regions containing O stars and a
sufficient surface density of disk-bearing sources to reliably test for spatial
avoidance, we find no evidence for the depletion of inner disks around pre-main
sequence stars in the vicinity of O-type stars, even very luminous O2-O5 stars.
These results suggest that massive star-forming regions are not very hostile to
the survival of protoplanetary disks and, presumably, to the formation of
planets.
