New Periodic 6.7 GHz Class II Methanol Maser Associated with G358.460-0.391

Abstract

Eight new class II methanol masers selected from the 6.7 GHz Methanol Multibeam survey catalogues I and II were monitored at 6.7 GHz with the 26m Hartebeesthoek Radio Astronomy Observatory (HartRAO) radio telescope for three years and seven months, from February 2011 to September 2014. The sources were also observed at 12.2 GHz and two were sufficiently bright to permit monitoring. One of the eight sources, namely G358.460-0.391, was found to show periodic variations at 6.7 GHz. The period was determined and tested for significance using the Lomb-Scargle, epoch-folding and Jurkevich methods, and by fitting a simple analytic function. The best estimate for the period of the 6.7 GHz class II methanol maser line associated with G358.460-0.391 is 220.0 $\pm$ 0.2 day.

8 pages, 11 figures, accepted for publication in MNRAS. The appendix of 4 pages (with 16 figures) will be published as online version

References in corpus (3)

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• The 6-GHz Multibeam Maser Survey I. Techniques
• On the Class II Methanol Maser Periodic Variability due to the Rotating Spiral Shocks in the Gaps of Disks Around Young Binary Stars

Cited by in corpus (10)

• Monitoring observations of 6.7 GHz methanol masers
• A 6.7 GHz Methanol Maser Survey II. Low Galactic Latitudes
• A 6.7 GHz Methanol Maser Survey at High Galactic Latitudes
• Long-term multi-frequency maser observations of the intermediate-mass young stellar object G107.298+5.639
• Detection of periodic flares in 6.7 GHz methanol masers G45.804-0.356 and G49.043-1.079
• Periodic variability of the mainline hydroxyl masers in G9.62+0.20E
• Detection of the longest periodic variability in 6.7 GHz methanol masers G5.900-0.430
• Orientation effect on the ligh curve shape of periodic methanol maser sources
• Massive Protocluster of a Periodic Maser Source G188.95+0.89
• Mid-Infrared and Maser Flux Variability Correlation in Massive Young Stellar Object G036.70+00.09