Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..816h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Sept. 1989, p. 816-831.
Astronomy and Astrophysics
Astronomy
18
Nebulae, Star Formation, Stellar Evolution, Stellar Winds, Herbig-Haro Objects, Stellar Mass Ejection, Stellar Spectra, T Tauri Stars
Scientific paper
Imaging and spectroscopic observations of premain-sequence stars in the B228 molecular cloud have identified three sites of extended, shock-excited nebulosity. A highly collimated, blueshifted jet is associated with the T Tauri star Sz68 (CoD -33:10685 deg). A candidate Herbig-Haro object is found near Sz68 and the T Tauri star Sz69. A third region of shock-excited nebulosity is identified near the embedded newborn star IRAS 15398-3359. IR excesses observed toward these stellar sources may imply a relationship between outflow activity and the presence of a circumstellar disk. Only one of the two outflow sources with well-defined orientations is aligned with the large-scale, magnetic-field geometry of the cloud in contrast to the global alignment of outflows in the Taurus cloud complex. Data for three previously unidentified emission-line stars are presented. A faint 18th magnitude dMe star located 48 arcsecs west of Sz68 is identified.
Graham John A.
Heyer Mark H.
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