Tidal foces as a regulator of star formation in Taurus

Abstract

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.

Minor changes. 5 pages. Accepted by MNRAS

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Cited by in corpus (5)

• From diffuse gas to dense molecular cloud cores
• Multiplicity and clustering in Taurus star-forming region. I. Unexpected ultra-wide pairs of high-order multiplicity in Taurus
• Accretion and Diffusion Timescales in Sheets and Filaments
• The effect of tidal forces on the Jeans instability criterion in star-forming regions
• Why most molecular clouds are gravitationally dominated