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We have conducted a deep multi-wavelength analysis (0.15-160 mum) to studythe outer region of the nearby galaxy M94. We show that the non-optical datasupport the idea that the outskirts of this galaxy is not formed by a closedstellar ring (as traditionally claimed in the literature) but by a spiral armstructure. In this sense, M94 is a good example of a Type III (anti-truncated)disk galaxy having a very bright outer disk. The outer disk of this galaxycontains ~23% of the total stellar mass budget of the galaxy and contributes~10% of the new stars created showing that this region of the galaxy is active.In fact, the specific star formation rate of the outer disk (~0.012 Gyr^{-1})is a factor of ~2 larger (i.e. the star formation is more efficient per unitstellar mass) than in the inner disk. We have explored different scenarios toexplain the enhanced star formation in the outer disk. We find that the innerdisk (if considered as an oval distortion) can dynamically create a spiral armstructure in the outer disk which triggers the observed relatively high starformation rate as well as an inner ring similar to what is found in thisgalaxy.

Unveiling the nature of M94's (NGC4736) outer region: a panchromatic perspective