Publications (10)
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…
NGC 2362: a Template for Early Stellar Evolution
A. Moitinho, J. Alves, N. Huelamo +1
We present UBVRI photometry for the young open cluster NGC 2362. From analysis of the appropriate color-color and color-magnitude diagrams we derive the fundamental parameters of t…
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…
Accelerated gas flow along Ophiuchus B44 filament: Breaking Position-Position-Velocity degeneracy
J. Alves, C. Zucker, C. Lada +15
(Abridged) Stellar feedback from massive stars in the Upper-Sco has been proposed to have reshaped the gas in the nearby Ophiuchus complex. In this framework, feedback organizes 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…
Hipparcos distances of Ophiuchus and Lupus cloud complexes
M. Lombardi, C. Lada, J. Alves
We combine extinction maps from the Two Micron All Sky Survey (2MASS) with Hipparcos and Tycho parallaxes to obtain reliable and high-precision estimates of the distance to the Oph…
Correlation Between Gas and Dust in Molecular Clouds: L977
J. Alves, C. Lada, E. Lada
We report observations of the J =(1--0) C18O molecular emission line toward the L977 molecular cloud. To study the correlation between C18O emission and dust extinction we construc…
Dust Extinction and Molecular Cloud Structure: L977
J. Alves, C. Lada, E. Lada +2
We report results of a near--infrared imaging survey of L977, a dark cloud in Cygnus seen in projection against the plane of the Milky Way. We use measurements of the near--infrare…
The Luminosity & Mass Function of the Trapezium Cluster: From B stars to the Deuterium Burning Limit
A. Muench, E. Lada, C. Lada +1
We use the results of a new, multi-epoch, multi-wavelength, near-infrared census of the Trapezium Cluster in Orion to construct and to analyze the structure of its infrared (K band…
Dust properties of the dark cloud IC5146 - Submillimeter and NIR imaging
C. Kramer, J. Richer, B. Mookerjea +2
We present the results of a submillimeter dust continuum study of a molecular ridge in IC5146 carried out at 850micron and 450micron with SCUBA on the James Clerk Maxwell Telescope…