2019MNRAS.487L..77V

Query : 2019MNRAS.487L..77V

2019MNRAS.487L..77V - Mon. Not. R. Astron. Soc., 487, L77-L80 (2019/July-3)

Unusual flare activity in the extreme-velocity -81 km s–1 water-maser feature in W49N.

VOLVACH L.N., VOLVACH A.E., LARIONOV M.G., MacLEOD G.C. and WOLAK P.

Abstract (from CDS):

We report the detection of significant flaring events of the water masers associated with W49N using the radio telescopes RT-22 (Simeiz) and RT-32 (Torun). Two flares were detected between 2017 September to 2018 November. The -81 km s–1 water-maser feature reached a maximum of ∼50 kJy during these flares. The correlation of the observed exponential growth in flux density with a decreasing line width is consistent with the expected behaviour of an unsaturated maser. Possible mechanisms producing energy releases sufficient to power the water-maser flares in W49N are discussed.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: formation - (ISM:) HII regions - ISM: molecules - ISM: molecules

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
2 RAFGL 7009S HII 18 34 20.911 -05 59 42.23           ~ 231 0
3 W 49n HII 19 10 13.2 +09 06 12           ~ 497 3
4 W 49 SFR 19 10 20 +09 07.7           ~ 601 1
5 W 49b SNR 19 11 09.5 +09 06 21           ~ 500 1

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