Abstract
The apparent structure of S162 and of the Bubble Nebula (NGC 7635) associated with it, is discussed using a number of direct images taken through narrow band (10 A) interference filters in Ha, [N II] and in the continuum at A6607. The results are discussed together with the radial velocity field of S162 particular of the Bubble Nebula as obtained from photographic Fabry-Perot interferometry. The Bubble Nebula is shown to be composed of distinct and amorphous very regularly curving arcs, all inscribed on a tenuous slightly ellipsoidal shell of gas expanding at velocity of about 4 km 5- . The arcs are probably genetically related to the globules which form the characteristic comet- like feature within the Bubble Nebula. The ionization source of S162 is BD + 602522 and 071 f star classified from our high dispersion spectrum. Our very tentative suggestion is that the brightest obule may be an offshoot of this star and that the globule has generated the next globule which in turn may have generated the third one. The configuration of NGC 7635 suggests that magnetic fields are likely to be operative in the region. Polarimetry in the optical and in the radio range as well as high resolution infrared studies, high resolution velocity fields are desirable to find a satisfactory model for this nebula.
