SIMBAD references

2011ApJ...727...99C - Astrophys. J., 727, 99 (2011/February-1)

Multiple high-velocity SiO maser features from the high-mass protostar W51 North.

CHO S.-H., KIM J. and BYUN D.-Y.

Abstract (from CDS):

We present the detection of multiple high-velocity silicon monoxide (SiO v = 1, 2, J = 1-0) maser features in the high-mass protostar W51 North which are distributed over an exceedingly large velocity range from 105 to 230 km/s. The SiO v = 1, J = 1-0 maser emission shows 3-5 narrow components which span a velocity range from 154 to 230 km/s according to observational epochs. The SiO v = 2, J = 1-0 maser also shows 3-5 narrow components that do not correspond to the SiO v = 1 maser and span a velocity range from 105 to 154 km/s. The multiple maser components show significant changes on very short timescales (<1 month) from epoch to epoch. We suggest that the high-velocity SiO masers may be emanated from massive star-forming activity of the W51 North protostar as SiO maser jets and will be a good probe of the earliest evolutionary stages of high-mass star formation via an accretion model. Further high angular resolution observations will be required for confirmation.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - masers - radio lines: stars - stars: formation - stars: individual: W51 North

Errata: erratum vol. 739, art. 106 (2011)

Simbad objects: 5

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