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We analyze the projected axial ratio distribution, p(b/a), of galaxies that were spectroscopically selected from the Sloan Digital Sky Survey (DR6) to have low star formation rates. For these quiescent galaxies we find a rather abrupt change in p(b/a) at a stellar mass of 10 11 M : at higher masses there are hardly any galaxies with b/a 10 11 M ), quiescent galaxies, as it inevitably results in spheroids.
Wel et al. (Mon,) studied this question.