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HST images of proplyds in the Orion Nebula, as well as submillimeter/radiomeasurements, show that the dominant O7 star Theta1 Ori C photoevaporatesnearby disks around pre-main sequence stars. Theory predicts that massive starsphotoevaporate disks within distances of order 0.1 pc. These findings suggestthat young, OB-dominated massive H II regions are inhospitable to the survivalof protoplanetary disks, and subsequently to the formation and evolution ofplanets. In the current work, we test this hypothesis using large samples ofpre-main sequence stars in 20 massive star-forming regions selected with X-rayand infrared photometry in the MYStIX survey. Complete disk destruction wouldlead to a deficit of cluster members with excess in JHKs and Spitzer/IRAC bandsin the vicinity of O stars. In four MYStIX regions containing O stars and asufficient surface density of disk-bearing sources to reliably test for spatialavoidance, we find no evidence for the depletion of inner disks around pre-mainsequence 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 tothe survival of protoplanetary disks and, presumably, to the formation ofplanets.

No evidence for protoplanetary disk destruction by OB stars in the MYStIX sample