Spitzer Observations of L429: A Near-collapse or Collapsing Starless Core

Abstract

We present Spitzer infrared observations of the starless core L429. The IR images of this core show an absorption feature, caused by the dense core material, at wavelengths <= 70 micron. The core has a steep density profile, and reaches A_V > 35 mag near the center. We show that L429 is either collapsing or in a near-collapse state.

arXiv comment5 pages, 3 figures, emulateapj format, accepted for publication in ApJL

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• Astrochemical models of interstellar ices: History matters
• The first frost in the Pipe Nebula
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• Constraining the Dust Opacity Law in Three Small and Isolated Molecular Clouds
• Constraints on the non-thermal desorption of methanol in the cold core LDN 429-C