Study of variable stars associated with maser sources: G025.65+1.05

Abstract

We report variation of K-band infrared (IR) emission in the vicinity of the G025.65+1.05 water and methanol maser source. New observational data were obtained with 2.5m telescope of the Caucasian Mountain Observatory (CMO) of Moscow State University on 2017-09-21 during the strong water maser flare. We found that the IR source situated close to the maser position had decreased brightness in comparison to archive data. This source is associated with a massive young stellar object (MYSO) corresponding to the compact infrared source IRAS 18316-0602 (RAFGL 7009S). Similar decrease in K-brightness of the IR source close to the maser position was observed in March~2011 when the water maser activity was increased. The dips in MYSO brightness can be related to the maser flare phases. Maser flares that are concurrent with dips of the IR emission can be explained if the lower IR radiation field enables more efficient sink of the pumping cycle by allowing IR photons to escape the maser region.

arXiv commentAccepted for publication in RAA

References in corpus (13)

• An extraordinary outburst in the massive protostellar system NGC6334I-MM1: quadrupling of the millimeter continuum
• A near IR imaging survey of intermediate and high-mass young stellar outflow candidates
• The Physics of Water Masers observable with ALMA and SOFIA: Model Predictions for Evolved Stars
• A Masing Event in NGC6334I: Contemporaneous Flaring of Hydroxyl, Methanol and Water Masers
• Giant burst of methanol maser in S255IR-NIRS3
• ASTRONIRCAM - infrared camera-spectrograph for Sternberg institute 2.5 METER TELESCOPE
• The extraordinary outburst in the massive protostellar system NGC6334I-MM1: Flaring of the water masers in a north-south bipolar outflow driven by MM1B
• Discovery of periodic and alternating flares of the methanol and water masers in G107.298+5.639
• A Survey of Extended H${}_2$ Emission from Massive YSOs
• Mid-Infrared Source Multiplicity within Hot Molecular Cores traced by Methanol Masers
• Water Masers Diagnosing Postshocked Conditions in W49N
• Detection of a new methanol maser line with ALMA
• Superflares of H${}_2$O Maser Emission in the Protostellar Object IRAS 18316$-$0602

Cited by in corpus (2)

• The evolution of the H2O maser emission in the accretion burst source G358.93-0.03
• Maser Flares Driven by Variations in Pumping and Background Radiation