Published September 1989 | Version v1
Journal article

Newborn stars and stellar winds in Barnard 228

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

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