A note on the periodic methanol masers in G9.62+0.20E

Abstract

A number of mechanisms to understand the periodic class II methanol masers associated with some high-mass star forming regions have been proposed in the past. Two recent proposals, ie. by Parfenov &Sobolev (2014) and Sanna et al. (2015) have been presented in order to explain the periodic masers in sources with light curves similar to the methanol masers in G9.62+0.20E. We evaluate to what extent the proposals and models presented by these authors can explain the light curve of the methanol masers in G9.62+0.20E. It is argued that neither of the proposed mechanisms can reproduce the light curves of the methanol masers in G9.62+0.20E.

6 pages, 3 figures. To appear in Astronomy and Astrophysics

References in corpus (4)

• On the Class II Methanol Maser Periodic Variability due to the Rotating Spiral Shocks in the Gaps of Disks Around Young Binary Stars
• Discovery of four periodic methanol masers and updated light curve for a further one
• A Panoply of Cepheid Light Curve Templates
• The environment of the strongest galactic methanol maser

Cited by in corpus (10)

• Discovery of periodic and alternating flares of the methanol and water masers in G107.298+5.639
• A 6.7 GHz Methanol Maser Survey II. Low Galactic Latitudes
• A 6.7 GHz Methanol Maser Survey at High Galactic Latitudes
• The shortest periodic and flaring flux variability of a methanol maser emission at 6.7 GHz in G 014.23-00.50
• 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
• Maser Flares Driven by Variations in Pumping and Background Radiation
• Periodic 6.7 GHz $\mathrm{C}{\mathrm{H}}_3\mathrm{OH}$ maser emission in G353.273+0.641: First candidate for a pulsating high-mass protostar