Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...319..742m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 319, Aug. 15, 1987, p. 742-753.
Astronomy and Astrophysics
Astrophysics
73
Gas Flow, Spectral Resolution, Stellar Envelopes, Stellar Evolution, Stellar Mass Ejection, Astronomical Maps, Flow Velocity, Image Reconstruction, Stellar Spectrophotometry, Stellar Winds, Velocity Distribution
Scientific paper
Approximately one-half of the L1551 bipolar outflow was mapped in the J = 1-0 transition of (C-12)O using the FCRAO 14 m telescope. The data were obtained by heavily oversampling over the beam area and then were reconstructed using a maximum entropy algorithm to obtain images of the high-velocity gas with an angular resolution of about 20 arcsec. The outflow exhibits a striking shell-like structure with the lowest velocity outflowing gas found along the limb of the outflow, and the highest velocity outflowing gas found along the axis of the outflow. A smooth transition is found between low-velocity emission on the periphery and high-velocity gas in the center. The data can be modeled by molecular material located in a thin expanding shell which is accelerating away from IRS 5.
Grasdalen Gary L.
Moriarty-Schieven Gerald H.
Schloerb Peter F.
Snell Ronald L.
Strom Karen M.
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