2020MNRAS.494L..59V

Query : 2020MNRAS.494L..59V

2020MNRAS.494L..59V - Mon. Not. R. Astron. Soc., 494, L59-L63 (2020/May-1)

Monitoring a methanol maser flare associated with the massive star-forming region G358.93-0.03.

VOLVACH A.E., VOLVACH L.N., LARIONOV M.G., MacLEOD G.C., VAN DEN HEEVER S.P. and SUGIYAMA K.

Abstract (from CDS):

We report the earliest detection of the 19.967-GHz [transition 21-30E (t = 0)] methanol maser associated with the massive star-forming region G358.93-0.03. The flare was detectable from 2019 January 23 to March 5, for only 44 d. It turned out to be the most powerful 19.967-GHz maser in the Galaxy in the entire history of observations, taking into account the 104-Jy flux from it on the Earth's surface and the distance to the source, 6.75 kpc. The 19.967-GHz maser flared contemporaneously with the first of two flares detected in associated 20.971-GHz methanol masers. We estimated that the ratio of flux densities between these two transitions is F20.971/F19.967 = 14 ± 4, increasing to >520 in the second flare. We discuss the differences between the two flares in the 20.971-GHz methanol masers and the consequence thereof.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: formation - H ii regions - ISM: molecules - radio lines: ISM

Simbad objects: 11

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Number of rows : 11
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 Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
2 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
3 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
4 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
5 [BHC2016] MM1 cor 17 20 53.415 -35 46 57.88           ~ 121 0
6 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 244 1
7 MMB G358.931-00.030 SFR 17 43 10.02 -29 51 45.8           ~ 70 0
8 RAFGL 7009S HII 18 34 20.911 -05 59 42.23           ~ 231 0
9 W 49n HII 19 10 13.2 +09 06 12           ~ 497 3
10 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
11 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0

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