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The mass function of dense molecular cores and the origin of the IMF
J. Alves, M. Lombardi, C. Lada
Context: Stars form in the cold dense cores of interstellar molecular clouds and the detailed knowledge of the spectrum of masses of such cores is clearly a key for the understandi…
The Formation of Brown Dwarfs: Observations
Kevin L. Luhman, Viki Joergens, Charles Lada +3
We review the current state of observational work on the formation of brown dwarfs, focusing on their initial mass function, velocity and spatial distributions at birth, multiplici…
2MASS wide field extinction maps - I. The Pipe nebula
Marco Lombardi, Joao Alves, Charles J. Lada
We present a 8 deg x 6 deg, high resolution extinction map of the Pipe nebula using 4.5 million stars from the Two Micron All Sky Survey (2MASS) point source catalog. The use of NI…
The Thermal Structure of Gas in Pre-Stellar Cores: A Case Study of Barnard 68
E. A. Bergin, S. Maret, F. F. S. van der Tak +3
We present a direct comparison of a chemical/physical model to multitransitional observations of C18O and 13CO towards the Barnard 68 pre-stellar core. These observations provide a…
24-micron Detections of Disks around Very Low-mass Stars and Brown Dwarfs in IC 348: Grain Growth/Settling and Inner Holes?
James Muzerolle, Lucia Adame, Paola D'Alessio +11
We present observations of six late-type members of the young cluster IC 348 detected at 24 microns with the Multiband Imaging Photometer for Spitzer(MIPS). At least four of the ob…
Stellar Multiplicity and the IMF: Most Stars Are Single
Charles J. Lada
In this short communication I compare recent findings suggesting a low binary star fraction for late type stars with knowledge concerning the forms of the stellar initial and prese…
Oscillations of starless cores
Eric Keto, Avery Broderick, Charles J. Lada +1
If the split, asymmetric molecular spectral line profiles that are seen in many starless cores are interpreted as indicative of global collapse or expansion of the core then one po…
Spitzer and Magellan Observations of NGC 2264: A Remarkable Star Forming Core Near IRS-2
E. T. Young, P. S. Teixeira, C. J. Lada +7
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 a…