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Spitzer imaging of the jet driving the NGC 2264 G outflow
Paula S. Teixeira, Carolyn McCoey, Michael Fich +1
We present new infrared imaging of the NGC 2264 G protostellar outflow region, obtained with the InfraRed Array Camera (IRAC) on-board the Spitzer Space Telescope. A jet in the red…
Oscillating Starless Cores: The Nonlinear Regime
Avery E. Broderick, Eric Keto, Charles J. Lada +1
In a previous paper, we modeled the oscillations of a thermally-supported (Bonnor-Ebert) sphere as non-radial, linear perturbations following a standard analysis developed for stel…
Using Chemistry to Unveil the Kinematics of Starless Cores: Complex Radial Motions in Barnard 68
Sébastien Maret, Edwin A. Bergin, Charles J. Lada
We present observations of 13CO, C18O, HCO+, H13CO+, DCO+ and N2H+ line emission towards the Barnard 68 starless core. The line profiles are interpreted using a chemical network co…
The Nature of the Dense Core Population in the Pipe Nebula: Thermal Cores Under Pressure
Charles J. Lada, August A. Muench, Jill M. Rathborne +2
In this paper we present the results of a systematic investigation of an entire population of starless dust cores within a single molecular cloud. Analysis of extinction data shows…
The nature of the dense core population in the pipe nebula: core and cloud kinematics from C18O observations
August A. Muench, Charles J. Lada, Jill M. Rathborne +2
We present molecular-line observations of 94 dark cloud cores identified in the Pipe nebula through near-IR extinction mapping. Using the Arizona Radio Observatory 12m telescope, w…
The nature of the dense core population in the Pipe Nebula: A survey of NH3, CCS, and HC5N molecular line emission
J. M. Rathborne, C. J. Lada, A. A. Muench +2
Recent extinction studies of the Pipe Nebula (d=130 pc) reveal many cores spanning a range in mass from 0.2 to 20.4 Msun. These dense cores were identified via their high extinctio…
A dense micro-cluster of Class 0 protostars in NGC 2264 D-MM1
Paula S. Teixeira, Luis A. Zapata, Charles J. Lada
We present sensitive and high angular resolution (~1") 1.3 mm continuum observations of the dusty core D-MM1 in the Spokes cluster in NGC 2264 using the Submillimeter Array. A dens…
The Relationship between the Optical Depth of the 9.7 micron Silicate Absorption Feature and Infrared Differential Extinction in Dense Clouds
J. E. Chiar, K. Ennico, Y. J. Pendleton +8
We have examined the relationship between the optical depth of the 9.7 micron silicate absorption feature (tau_9.7) and the near-infrared color excess, E(J-Ks) in the Serpens, Taur…
The Dynamical State of the Starless Dense Core FeSt 1-457: A Pulsating Globule?
E. D. Aguti, C. J. Lada, E. A. Bergin +2
High resolution molecular line observations of CS, HCO+, C18O and N2H+ were obtained toward the starless globule FeSt 1-457 in order to investigate its kinematics and chemistry. Th…
The Dynamical State fo the Starless Dense Core FeSt 1-457: A Pulsating Globule?
E. D. Aguti, C. J. Lada, E. A. Bergin +2
High resolution molecular line observations of CS, HCO+, C18O and N2H+ were obtained toward the starless globule FeSt 1-457 in order to investigate its kinematics and chemistry. Th…
The Infrared Extinction Law at Extreme Depth in a Dark Cloud Core
C. Román-Zúñiga, C. Lada, A. Muench +1
We combined sensitive near-infrared data obtained with ground-based imagers on the ESO NTT and VLT telescopes with space mid-infrared data acquired with the IRAC imager on the Spit…
A Spitzer census of the IC 348 nebula
August A. Muench, Charles J. Lada, K. L. Luhman +2
We present a Spitzer based census of the IC 348 nebula and embedded star cluster. Our Spitzer census supplemented by ground based spectra has added 42 class II T-Tauri sources to t…