文章基本信息

标题：Flaring water masers associated with W49N
本地全文：下载
作者：L. N. Volvach ; A. E. Volvach ; M. G. Larionov 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：628
页码：1-4
DOI：10.1051/0004-6361/201935521
语种：English
出版社：EDP Sciences
摘要：Aims.We present our monitoring observations and analysis of water masers associated with W49N taken in 2017 and 2018. A significant flare occurred during these observations.Methods.We used ground-based radio telescopes in Simeiz (RT-22), Torun (RT-32), Medicina (RT-32), Effelsberg (RT-100) with broadband spectrometers. Observational data were collected and processed automatically.Results.We report a powerful flare of thev= +6 km s−1water maser feature; it increased in over ten months toS1.3 cm= 84 kJy in 2017 December, then decayed to the pre-flare quiescent value ofS1.3 cm= 8.7 kJy in 2018 August. We infer that this flaring feature is unsaturated based on the relationship between line width and flux density.
关键词：Key wordsenmasersstars: formationHII regionsradio lines: ISM