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

TL;DR

This paper reports Spitzer infrared observations of the starless core L429, revealing a steep density profile and suggesting it is either collapsing or close to collapse, providing insights into early star formation stages.

Contribution

The study provides detailed infrared imaging of L429, indicating its dynamic state and contributing to understanding starless core evolution.

Findings

L429 shows a steep density profile with A_V > 35 mag.

Infrared absorption features suggest the core is collapsing or near collapse.

The observations offer evidence for early stages of star formation.

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.