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2MASS wide field extinction maps: II. The Ophiuchus and the Lupus cloud complexe
Marco Lombardi, Charles J. Lada, Joao Alves
We present an extinction map of a ~1,700 deg sq region that encloses the Ophiuchus, the Lupus, and the Pipe dark complexes using 42 million stars from the Two Micron All Sky Survey…
The dense ring in the Coalsack: the merging of two subsonic flows
J. M. Rathborne, C. J. Lada, W. Walsh +2
A recent high angular resolution extinction map toward the most opaque molecular globule, Globule 2, in the Coalsack Nebula revealed that it contains a strong central ring of dust…
New M dwarf debris disk candidates in NGC 2547
Jan Forbrich, Charles J. Lada, August A. Muench +1
With only six known examples, M-dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shall…
Discovery of superthermal hydroxyl (OH) in the HH211 outflow
A. Tappe, C. J. Lada, J. H. Black +1
We present a 5-37 micron infrared spectrum obtained with the Spitzer Space Telescope toward the southeastern lobe of the young protostellar outflow HH211. The spectrum shows an ext…
Embedded Oscillating Starless Cores
Avery E. Broderick, Ramesh Narayan, Eric Keto +1
In a previous paper we demonstrated that non-radial hydrodynamic oscillations of a thermally-supported (Bonnor-Ebert) sphere embedded in a low-density, high-temperature medium pers…
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…