Tidal foces as a regulator of star formation in Taurus

Details Tidal foces as a regulator of star formation in Taurus Tidal foces as a regulator of star formation in Taurus

2009-03-03

arxiv.org/abs/0903.0603v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Minor changes. 5 pages. Accepted by MNRAS

Scientific paper

10.1111/j.1745-3933.2009.00647.x

Only a few molecular clouds in the Solar Neighborhood exhibit the formation of only low-mass stars. Traditionally, these clouds have been assumed to be supported against more vigorous collapse by magnetic fields. The existence of strong magnetic fields in molecular clouds, however, poses serious problems for the formation of stars and of the clouds themselves. In this {\em Letter}, we review the three-dimensional structure and kinematics of Taurus --the archetype of a region forming only low-mass stars-- as well as its orientation within the Milky way. We conclude that the particularly low star-formation efficiency in Taurus may naturally be explained by tidal forces from the Galaxy, with no need for magnetic regulation or stellar feedback.

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