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http://hdl.handle.net/20.500.12386/29202
Title: | Flaring water masers associated with W49N | Authors: | Volvach, L. N. Volvach, A. E. Larionov, M. G. MacLeod, G. C. Wolak, P. Kramer, B. Menten, K. M. Kraus, A. BRAND, JAN ZANICHELLI, Alessandra POPPI, Sergio RIGHINI, SIMONA |
Issue Date: | 2019 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 628 | First Page: | A89 | Abstract: | <BR /> 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. <BR /> 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. <BR /> Results: We report a powerful flare of the v = +6 km/s water maser feature; it increased in over ten months to S(1.3 cm) = 84 kJy in 2017 December, then decayed to the pre-flare quiescent value of S(1.3 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. | URI: | http://hdl.handle.net/20.500.12386/29202 | URL: | https://www.aanda.org/articles/aa/full_html/2019/08/aa35521-19/aa35521-19.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201935521 | Bibcode ADS: | 2019A&A...628A..89V | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Volvach-AA628.pdf | pdf editoriale | 561.67 kB | Adobe PDF | View/Open |
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