A Swept-Up Molecular Bubble in L1551

Saeko S. Hayashi, Masahiko Hayashi, Norio Kaifu
1989 International Astronomical Union Colloquium  
The environment of the young stellar object IRS5 in L1551 dark cloud is a representative of the "protostellar disk and outflow" systems found in star forming regions. The bipolar molecular outflow there was discovered as the first of its kind a decade ago (Snell, Loren, and Plambeck 1980). Its location in the sky, that is, its proximity (160 pc), isolation, and its almost edge-on inclination have favored the observation in great detail. IRS5 is thought to have the spectral type G - K (Mundtet
more » ... pe G - K (Mundtet al. 1985) similar to the Sun, with its dominant activity in the stellar wind, and not in the UV radiation as in massive protostars. The blueshifted and redshifted outflow lobes are clearly resolved into a pair of shell structures. The successive studies, mostly in CO lines, have led to a model of the outflow in which the molecular material is accelerated at the edge of a cavity evacuated by the protostellar wind(e.g. Uchidaet al. 1987, Raineyet al. 1987, Moriarty-Schieven and Snell 1988).
doi:10.1017/s0252921100023836 fatcat:vyanpx6hwbdu3n76ldymiiu53y