Newborn stars and stellar winds in Barnard 228

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Publications of the Astronomical Society of the Pacific; (USA)

DOI:https://doi.org/10.1086/132502· OSTI ID:5253720

Heyer, M H; Graham, J A ^[1]

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1. Carnegie Institution of Washington, Washington, DC (USA)

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. 46 refs.

• OSTI ID: 5253720
• Journal Information: Publications of the Astronomical Society of the Pacific; (USA), Journal Name: Publications of the Astronomical Society of the Pacific; (USA) Vol. 101; ISSN PASPA; ISSN 0004-6280
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ERUPTIVE VARIABLE STARS
HERBIG-HARO OBJECTS
IDENTIFICATION SYSTEMS
INTERSTELLAR SPACE
MASS TRANSFER
NEBULAE
PLASMA JETS
SPACE
STAR EVOLUTION
STARS
STELLAR ACTIVITY
STELLAR WINDS
T TAURI STARS
VARIABLE STARS