Observations of heavy-element recombination lines in the Rho Ophiuchi dark cloud at 13 centimeters wavelength

1976 ◽  
Vol 206 ◽  
pp. 109 ◽  
Author(s):  
G. R. Knapp ◽  
T. B. H. Kuiper ◽  
R. L. Brown
Keyword(s):  
Heavy Element ◽  
Dark Cloud ◽  
Rho Ophiuchi

scholarly journals A Remarkable Bipolar Flow in the Center of the Rho Ophiuchi Cloud

1989 ◽  
Vol 120 ◽  
pp. 300-300
Author(s):  
Ph. Andre ◽  
J. Martin-Pintado ◽  
D. Despois ◽  
T. Montmerle
Keyword(s):  
Mass Loss Rate ◽  
Extreme Case ◽  
Width Ratio ◽  
Dark Cloud ◽  
Molecular Outflow ◽  
Ir Sources ◽  
Near Ir ◽  
Exciting Source ◽  
Rho Ophiuchi ◽  
Cloud Core

Using the IRAM 30-m telescope in August and December 1988, we have discovered the first molecular outflow in the central part (L1688) of the nearby ρ Ophiuchi dark cloud. This outflow, found in the J = 2 — 1 line of 12CO near the cloud core A, is an extreme case, weak (outflow mass-loss rate ≈ 5 x 10−8M⊙yr−1) and highly collimated (lenght to width ratio > 14), which explains why it has escaped previous detections with smaller telescopes. The high-velocity molecular gas is hot and optically thin, making the J = 2 — 1 line of 12CO ≈ 3-4 times stronger than the J = 1 — 0 line. Unexpectedly, this outflow does not appears to be driven by any of the embedded near-IR sources known in this region previous deep VLA surveys of the cloud (André, Montmerle, and Feigelson, 1987; Stine et al., 1988; André et al., in prep.). The outflow exciting source is thus probably a very low-luminosity ((L < 0.1L⊙) young stellar object. Using the 30-m equipped with the MPIfIR bolometer, we have very recently found (March 1989) that this object is the strongest continuum point source of L1688 at 1.3 mm. By analogy with L1551-IRS5 and HL Tau, the radio properties of this source suggest that it possesses a weak, possibly collimated, ionized wind and a relatively massive, cold circumstellar disk (Mdisk ≈0.1M⊙).

An investigation of grain properties in the Rho Ophiuchi dark cloud

1993 ◽  
Vol 105 ◽  
pp. 1010 ◽  
Author(s):  
Frederick J. Vrba ◽  
George V. Coyne ◽  
Santiago Tapia
Keyword(s):  
Dark Cloud ◽  
Rho Ophiuchi ◽  
Grain Properties

/C-13/O self-absorption in the Rho Ophiuchi dark cloud

1980 ◽  
Vol 238 ◽  
pp. 620 ◽  
Author(s):  
C. J. Lada ◽  
B. A. Wilking
Keyword(s):  
Dark Cloud ◽  
Rho Ophiuchi

Einstein observations of the Rho Ophiuchi dark cloud - an X-ray Christmas tree

1983 ◽  
Vol 269 ◽  
pp. 182 ◽  
Author(s):  
T. Montmerle ◽  
L. Koch-Miramond ◽  
E. Falgarone ◽  
J. E. Grindlay
Keyword(s):  
Christmas Tree ◽  
Dark Cloud ◽  
X Ray ◽  
Rho Ophiuchi

An ultraviolet extinction study of the rho Ophiuchi dark cloud

1980 ◽  
Vol 241 ◽  
pp. 173 ◽  
Author(s):  
C.-C. Wu ◽  
D. P. Gilra ◽  
R. J. van Duinen
Keyword(s):  
Dark Cloud ◽  
Ultraviolet Extinction ◽  
Rho Ophiuchi

IRAS observations of dust heating and energy balance in the Rho Ophiuchi dark cloud

1989 ◽  
Vol 339 ◽  
pp. 258 ◽  
Author(s):  
Thomas P. Greene ◽  
Erick T. Young
Keyword(s):  
Energy Balance ◽  
Dark Cloud ◽  
Rho Ophiuchi

scholarly journals DISCOVERY OF YOUNG METHANE DWARFS IN THE RHO OPHIUCHI L 1688 DARK CLOUD

2015 ◽  
Vol 811 (2) ◽  
pp. L16 ◽  
Author(s):  
Poshih Chiang ◽  
W. P. Chen
Keyword(s):  
Dark Cloud ◽  
Rho Ophiuchi

The nature and distribution of carbon recombination-line emission in the rho Ophiuchi dark cloud

1974 ◽  
Vol 192 ◽  
pp. 607 ◽  
Author(s):  
R. L. Brown ◽  
R. H. Gammon ◽  
G. R. Knapp ◽  
B. Balick
Keyword(s):  
Line Emission ◽  
Recombination Line ◽  
Dark Cloud ◽  
Rho Ophiuchi
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