2008

When is star formation episodic? A delay differential equation negative feedback model

Quillen, Alice C., Bland-Hawthorn, Joss

Understand

We introduce a differential equation for star formation in galaxies that incorporates negative feedback with a delay.

  • When the feedback is instantaneous, solutions approach a self-limiting equilibrium state.
  • When there is a delay, even though the feedback is negative, the solutions can exhibit cyclic and episodic solutions.
  • We find that periodic or episodic star formation only occurs when two conditions are satisfied.

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