Newborn stars and stellar winds in Barnard 228
Description
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
Additional details
Publishing Information
- Journal Title
- Publications of the Astronomical Society of the Pacific
- Journal Volume
- 101
- Series
- Publ. Astron. Soc. Pac.
- Journal Page Range
- 816-831
- ISSN
- 0004-6280
- CODEN
- PASPA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21029792
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- IDENTIFICATION SYSTEMS; INTERSTELLAR SPACE; MASS TRANSFER; NEBULAE; PLASMA JETS; STAR EVOLUTION; STARS; STELLAR WINDS; T TAURI STARS
- Descriptors DEC
- BINARY STARS; ERUPTIVE VARIABLE STARS; SPACE; STELLAR ACTIVITY; VARIABLE STARS