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Query : 2011MNRAS.414.1914C |
2011MNRAS.414.1914C - Mon. Not. R. Astron. Soc., 414, 1914-1926 (2011/July-1)
Magnetic fields from OH maser maps at 6035 and 6030 MHz at galactic sites 351.417+0.645 and 353.410-0.360.
CASWELL J.L., KRAMER B.H. and REYNOLDS J.E.
Abstract (from CDS):
Towards 351.417+0.645, positions and velocities were measured for 56 discrete maser spots. Remarkably, all of these are components of Zeeman pairs, with 6035-MHz pairs at 23 distinct locations, five of which show matching 6030-MHz pairs. Strikingly, at 14 southerly locations the magnetic field is typically -5 mG (towards us), whereas seven of the northerly locations show a magnetic field of opposite sign, of up to +6.4 mG. The velocity field spanning -11.2 to -5 km/s shows no simple pattern.
Maser emission towards 353.410-0.360 is confined to half an arcsecond total extent, comprising 24 maser spots, most of them members of nine Zeeman pairs. Derived magnetic fields are all negative, three between -4.8 and -10.6 mG and three much weaker fields between 0 and -1.6 mG. There is no simple pattern in the velocity field.
OH masers at the 1665- and 1720-MHz transitions, and prominent ultracompact H II regions, are present at both 351.417+0.645 and 353.410-0.360. They are accompanied by methanol maser emission at the 6668-MHz, 12-GHz, and 107-GHz transitions. Masers at the 1667-MHz transition of OH and at the 22-GHz transition of water are found towards 351.417+0.645, but not towards 353.410-0.360. The magnetic fields of both sites are in accord with tracing an ordered Galactic magnetic field.
Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS
Journal keyword(s): magnetic fields - masers - stars: formation - H {sc ii} regions - ISM: molecules - radio lines: ISM
Simbad objects: 10
Number of rows : 10 |
N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | NAME W 3 OH | HII | 02 27 04.1 | +61 52 22 | ~ | 1026 | 2 | |||||
2 | NAME Crux-Scutum Spiral Arm | reg | 12 30 | -60.0 | ~ | 306 | 0 | |||||
3 | NAME NGP | reg | 12 51 26.275 | +27 07 41.70 | ~ | 1178 | 0 | |||||
4 | NAME NGC 6334F (C) | HII | 17 20 53.45 | -35 47 02.6 | ~ | 230 | 1 | |||||
5 | IRAS 17233-3606 | HII | 17 26 42.8 | -36 09 17 | ~ | 84 | 0 | |||||
6 | GAL 353.41-00.36 | HII | 17 30 26.2 | -34 41 45 | ~ | 42 | 1 | |||||
7 | ICRF J174425.4-514443 | AGN | 17 44 25.45488279 | -51 44 43.7403710 | 20.2 | ~ | 94 | 1 | ||||
8 | ICRF J193925.0-634245 | Sy2 | 19 39 25.0245304992 | -63 42 45.640373400 | 18.87 | 18.37 | 17.64 | ~ | 1225 | 1 | ||
9 | SH 2-140 | OpC | 22 19 07.8 | +63 17 07 | ~ | 658 | 2 | |||||
10 | IRAS 22176+6303 | Y*O | 22 19 18.23 | +63 18 47.5 | ~ | 595 | 0 |
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