2016ApJS..227...17K


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST13:15:38

2016ApJS..227...17K - Astrophys. J., Suppl. Ser., 227, 17-17 (2016/December-0)

Linear polarization of class I methanol masers in massive star-forming regions.

KANG J.-H., BYUN D.-Y., KIM K.-T., KIM J., LYO A.-R. and VLEMMINGS W.H.T.

Abstract (from CDS):

Class I methanol masers are found to be good tracers of the interaction between outflows from massive young stellar objects with their surrounding media. Although polarization observations of Class II methanol masers have been able to provide information about magnetic fields close to the central (proto)stars, polarization observations of Class I methanol masers are rare, especially at 44 and 95 GHz. We present the results of linear polarization observations of 39 Class I methanol maser sources at 44 and 95 GHz. These two lines are observed simultaneously with one of the 21 m Korean VLBI Network telescopes in single-dish mode. Approximately 60% of the observed sources have fractional polarizations of a few percent in at least one transition. This is the first reported detection of linear polarization of the 44 GHz methanol maser. The two maser transitions show similar polarization properties, indicating that they trace similar magnetic environments, although the fraction of the linear polarization is slightly higher at 95 GHz. We discuss the association between the directions of polarization angles and outflows. We also discuss some targets having different polarization properties at both lines, including DR21(OH) and G82.58+0.20, which show the 90deg polarization angle flip at 44 GHz.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: magnetic fields - masers - polarization - stars: massive - stars: protostars - surveys - surveys

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 19

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Number of rows : 19

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 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3632 3
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5722 4
3 OMC 2 MoC 05 35 27 -05 10.1           ~ 404 1
4 SH 2-231 HII 05 39 12.9 +35 45 54           ~ 121 0
5 SH 2-255 N HII 06 12 53.3 +18 00 42           ~ 25 0
6 NGC 2264 OpC 06 40 58 +09 53.7           ~ 1622 0
7 NAME M 8E IR Y*O 18 04 53.9 -24 26 41           ~ 82 0
8 IRAS 18151-1208 Y*O 18 17 58.114 -12 07 24.84           ~ 101 0
9 2MASS J18191220-2047297 Y*O 18 19 12.21 -20 47 29.7           B1 125 0
10 LDN 379 DNe 18 30 34.0 -15 15 10           ~ 34 0
11 GRS G024.80 +00.10 SFR 18 38 14.8 -06 47 39           ~ 102 0
12 W 51e2 Rad 19 23 43.90 +14 30 34.8           ~ 187 0
13 [VES2000] 192128.90+142348.0 Mas 19 23 46.5 +14 29 41           ~ 12 0
14 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 365 1
15 NAME DR 21W PoC 20 38 55.0 +42 19 24           ~ 23 0
16 [MBS2007c] CygX-N44 Rad 20 39 01.01 +42 22 50.2           ~ 365 0
17 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 965 0
18 NAME W 75S FIR 3 Y*O 20 39 02.97 +42 25 52.5           ~ 19 0
19 NGC 7538 OpC 23 13 37 +61 30.0           ~ 834 0

    Equat.    Gal    SGal    Ecl

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2021.04.14-13:15:38

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