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A new interstellar molecule, methylcyanoacetylene (CH3C3N), has been detected in the molecular cloud TMC-1. The J = 8 --> 7, J = 7 --> 6, J = 6 --> 5, and J = 5 --> 4 transitions have been observed. For the first three of these, both the K = 0 and K = 1 components are present, while for J = 5 --> 4, only the K = 0 line has been detected. The observed(More)
The first observations of the 2(20)-2(11) transition of cyclopropenylidene (C3H2) at 21.6 GHz are described. In all cases where it has been detected, the line appears in absorption, showing that this transition is "refrigerated" (i.e., Tex < 2.7 K) in cold dust clouds. These results are compared with those for the 1(10)-1(01) transition of C3H2, and the(More)
We have detected the 1(10)-1(01) transition of C3HD at 19.418 GHz at twelve positions in cold, dark clouds and resolved the D hyperfine components in two sources (L1498 and TMC-1C) well enough to derive values for the D quadrupole coupling constants. Simultaneous observations of C3H2 in each source yield relative integrated line intensities in the range(More)
The last year or so has seen the identification of several new interstellar molecules, including C2S, C3S, C5H, C6H, and (probably) HC2CHO in the cold, dark cloud TMC-1; and the discovery of the first interstellar phosphorous-containing molecule, PN, in the Orion "plateau" source. Further interesting results include the observations of 13C3H2 and C3HD, and(More)
  • PROTOSTAR NEAR, G. SANDELL, +18 authors James Clerk
  • 1999
We have discovered an extreme high-velocity bipolar CO outÑow in the vicinity of NGC 2023, with total outÑow velocities of D200 km s~1. At very high velocities this outÑow is jetlike with an opening angle ¹4¡, while it shows a separate outÑow lobe at low velocities. The outÑow is bipolar and exhibits a clear mirror symmetry, which suggests that the source(More)
New wide-field images of the ρ Ophiuchus molecular cloud at 850 and 450 µm obtained with SCUBA on the James Clerk Maxwell Telescope reveal a wide variety of large-scale features that were previously unknown. Two linear features each 4 ′ (0.2 pc) in length extend to the north of the bright emission region containing SM1 and VLA 1623. These features may(More)
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