@Article{VilasBoasMyerFull:2000:COCOLu,
author = "Vilas Boas, Jos{\'e} Williams dos Santos and Myers, PC and
Fuller, GA",
title = "Dense cores of dark clouds. XII. (CO)-C-13 and CO)-O-18 in Lupus,
Corona Australis, Vela, and Scorpius",
journal = "Astrophysical Journal",
year = "2000",
volume = "532",
number = "2 Part 1",
pages = "1038--1050",
month = "Apr.",
keywords = "RADIASTRONOMIA, nuvens, mol{\'e}culas, forma{\c{c}}{\~a}o de
estrelas, ondas submilim{\'e}tricas, n{\'u}cleos, clouds,
molecules, satr formation, submillimeter waves, cores.",
abstract = "More than 110 dense condensations of the dark clouds in Lupus,
Corona Australis, Norma, Vela, and Scorpius were observed in the
(CO)-C-13 and (CO)-O-18 (J = 1-0)transitions. The condensations of
dark clouds with high star formation activity like the Ophiuchus,
Taurus, and Cepheus have average (CO)-O-18 and H-2 column
densities of 1.8 x 10(15)and 1.1 x 10(22)cm(-2). If We take the
average size of the condensations to be 0.2 pc, a condensation
must have average H-2 volumetric densities greater than or equal
to 2 x 10(4)cm(-3)in order to ea good candidate to form stars. The
four Lupus filaments have similar radial velocities and velocity
dispersions, suggesting that they originated from the same
parental cloud. Among these filaments, Lupus 1 is unique in having
recent star formation activity, despite the high number of T Tauri
stars observed toward the others. Lupus 1 also shows a complex
velocity gradient along its main axis. The distribution of radial
velocities of the condensations observed toward Scorpius are in
good agreement with the hypothesis that they are in a region with
expansion velocity smaller than or equal to 18 km s(-1). The
Corona Australis cloud has velocity gradients ranging from -0.5 km
s(-1)pc(-1)at one extreme to 0.1 km s(-1)pc(-1)at the other.",
issn = "0004-637X and 1538-4357",
label = "9557",
targetfile = "2000_vilasboas.pdf",
urlaccessdate = "18 jun. 2024"
}