Spitzer and Magellan Observations of NGC 2264: A Remarkable Star Forming Core Near IRS-2

Details Spitzer and Magellan Observations of NGC 2264: A Remarkable Star Forming Core Near IRS-2 Spitzer and Magellan Observations of NGC 2264: A Remarkable Star Forming Core Near IRS-2

2006-01-13

arxiv.org/abs/astro-ph/0601300v1

Astrophys.J. 642 (2006) 972-978

Astronomy and Astrophysics

Astrophysics

15 pages, 7 figures Accepted for publication in Astrophysical Journal

Scientific paper

10.1086/501227

We analyze {\it Spitzer} and Magellan observations of a star forming core near IRS-2 in the young cluster NGC 2264. The submillimeter source IRAS 12 S1, previously believed to be an intermediate mass Class 0 object is shown to be a dense collection of embedded, low mass stars. We argue that this group of stars represents the fragmenting collapse of a dense, turbulent core, based on a number of indicators of extreme youth. With reasonable estimates for the velocity dispersion in the group, we estimate a dynamical lifetime of only a few x 10$^{4}$ years. Spectral energy distributions of stars in the core are consistent with Class I or Class 0 assignments. We present observations of an extensive system of molecular hydrogen emission knots. The luminosity of the objects in the core region are consistent with roughly solar mass protostars.

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