ALMA images of the 855 μm continuum emission recorded toward the inner regions of the PDS 70 circumstellar disk. The image on the left was obtained adopting a robust parameter of 2 and has an angular resolution (FWHM of the synthesized beam) of 0.″093 × 0.″074 indicated by the black ellipse on the bottom left. The image in the middle panel was created adopting a robust parameter of 0.3 and has an angular resolution of 0.″067 × 0.″050. White contours are drown at 3 and 5 times the rms noise level. See the text for the details. The labels PDS 70 b_smm and PDS 70 c_smm indicate the compact sources of continuum emission discovered inside the dust cavity. The image on the right shows an overlay between the VLT/Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) NIR image published in Müller et al. (2018), and the ALMA low-intensity red contours from the image with robust = 2.0.