Periodic flares in two 6.7GHz methanol masers

DOI

Periodicity in the 6.7GHz methanol maser sources is a rare phenomenon discovered during long-term monitoring programs. Understanding underlying processes leading to periodic variability might give insight of the physical processes in high-mass starforming regions. We aim to identify and describe new periodic methanol masers. The observations were obtained with the Torun 32m antenna. Analysis of time series was conducted using well-proven statistical methods. Additionally, NEOWISE data were used to search for infra-red and maser fluxes correlation. We found two new periodic sources: G45.804-0.356 and G49.043-1.079 with periods of 416.9 and 469.3 days, respectively. For G49.043-1.079, infra-red variability is simultaneous with methanol flares. A most likely cause of periodicity in G49.043-1.079 is modulated accretion, while for G45.804-0.356 cannot be explained with the available data and further research is needed.

Identifier
DOI http://doi.org/10.26093/cds/vizier.36610114
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/661/A114
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/661/A114
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/661/A114
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/661/A114
Provenance
Creator Olech M.; Durjasz M.; Szymczak M.; Bartkiewicz A.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Interstellar medium; Natural Sciences; Observational Astronomy; Physics