Other
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...332..354h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 332, Sept. 1, 1988, p. 354-363. Research supported by the Japan Society for
Other
21
Astronomical Spectroscopy, Carbon Monoxide, Molecular Clouds, Molecular Flow, Nebulae, Stellar Structure, Emission Spectra, H Ii Regions, Red Shift, Star Formation, Stellar Mass Ejection
Scientific paper
Observations of the detailed spatial and velocity structure of the CO J = 1-0 emission have been made for the central 2arcmin×2arcmin region of Cepheus A. This object appears to have two ordered structures. The high-velocity components, with offset velocities larger than 5 km s-1, are compact and well-collimated in the east-to-west direction. The lower velocity components are extended and, though not well collimated, can be divided into two sectors. Blue-shifted emission is dominant in the northeast of HW 2/3d, while redshifted emission is strong in the south and west. The displacement of the low-velocity CO is the same as that of other bipolar structures related to the outflow activity. These new data support the outflow hypothesis for the northeast-to-southwest structure, rather than the disk hypothesis. In this case, the low-velocity CO feature represents the cavity wall of the outflow.
Hasegawa Tetsuo
Hayashi Saeko Suzuki
Kaifu Norio
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