2002A&A...387..310V


Query : 2002A&A...387..310V

2002A&A...387..310V - Astronomy and Astrophysics, volume 387, 310-316 (2002/5-3)

Torsionally excited methanol at 44.9 GHz.

VORONKOV M.A., AUSTIN M.C. and SOBOLEV A.M.

Abstract (from CDS):

Using the Haystack Observatory 37-m radio telescope we have undertaken a search for emission in the 20-31 E rotational transition of methanol in its first torsionally excited state (vt=1) at 44.9GHz. We examined seven galactic sources - six strong emitters of Class II methanol maser lines and Orion KL, the only source where this line had been previously detected. We confirm (at a level of 5σ) the previous detection and report two new detections - a reliable (9σ) detection in W3(OH) and a marginal (3.5σ) detection in NGC 6334F. Upper limits for other sources are presented. Although we did not see obvious signatures of maser amplification in this transition in any source, arguments in favor of weak masing in W3(OH) are presented.

Abstract Copyright:

Journal keyword(s): masers - ISM: molecules - ISM: individual objects: W3(OH), Orion KL, NGC 6334F - stars: formation

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 968 2
2 W 3(H2O) Mas 02 27 04.6 +61 52 25           ~ 131 0
3 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2098 1
4 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 250 3
5 NGC 6334 HII 17 20 51 -36 06.9           ~ 620 0
6 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 213 1
7 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 190 0
8 SNR G035.2-01.8 SNR 19 01.6 +01 14           ~ 150 0
9 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 369 1

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2021.09.23-13:09:12

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