14 years of 6.7 GHz periodic methanol maser observations towards G188.95+0.89. Issue Volume 15:Issue S356(2019) (October 2019)

• Record Type: Journal Article
• Authors: Mutie, Martin M.; Baki, Paul; Chibueze, James O.; El Bouchefry, Khadija
• Editors: Pović, Mirjana; Marziani, Paola; Masegosa, Josefa; Netzer, Hagai; Negu, Seblu H.; Tessema, Solomon B.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S356(2019)
• Page Start: 393
• Page End: 394
• Publication Date: 2019-10
• Subjects: ISM: individual (G188.95+0.89), -- ISM: molecules, -- stars: imaging; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921320003543
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We report the results of 14 years of monitoring of G188.95+0.89 periodic 6.7 GHz methanol masers using the Hartebeesthoek 26-m radio telescope. G188.95+0.89 (S252, AFGL5180) is a radio-quiet methanol maser site that is often interpreted as precursors of ultra-compact HII regions or massive protostar sites. At least five bright spectral components were identified. The maser feature at 11.36 km s -1 was found to experience an exponential decay during the monitoring period. The millimetre continuum reveals two cores associated with the source.