Spitzer and magellan observations of NGC 2264: A remarkable star-forming core near IRS 2

E. T. Young*, P. S. Teixeira, C. J. Lada, J. Muzerolle, S. E. Persson, D. C. Murphy, N. Siegler, M. Marengo, O. Krause, A. K. Mainzer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


We analyze 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, using 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 times 104 yr. 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.

Original languageEnglish
Pages (from-to)972-978
Number of pages7
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 10 May 2006


  • Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 2264
  • Stars: Formation
  • Stars: Pre-Main-Sequence


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