First detection of CS masers around a high-mass young stellar object, W51 e2e

Abstract

We report the discovery of maser emission in the two lowest rotational transitions of CS toward the high-mass protostar W51 e2e with ALMA and the JVLA. The masers from CS J=1-0 and J=2-1 are neither spatially nor spectrally coincident (they are separated by ~150 AU and ~30 km/s), but both appear to come from the base of the blueshifted outflow from this source. These CS masers join a growing list of rarely-detected maser transitions that may trace a unique phase in the formation of high-mass protostars.

Accepted to AJ

References in corpus (6)

• Thermal Feedback in the high-mass star and cluster forming region W51
• The dense gas mass fraction in the W51 cloud and its protoclusters
• A multiple system of high-mass YSOs surrounded by disks in NGC7538 IRS1
• Proper Motions of OH Masers and Magnetic Fields in Massive Star-Forming Regions
• Hot Ammonia around Young O-type Stars. II. JVLA imaging of highly-excited metastable ammonia masers in W51-North
• On the nature of the enigmatic object IRAS 19312+1950: A rare phase of massive star formation?

Cited by in corpus (2)

• Spectral-line Survey of the Region of Massive Star Formation W51e1/e2 in the 4 mm Wavelength Range
• On the pumping of the CS($v=0$) masers in W51 e2e