1994A&A...286L..51G

Query : 1994A&A...286L..51G

1994A&A...286L..51G - Astronomy and Astrophysics, volume 286L51-54 (1994/6-3)

The magnetic field in the dense gas bordering W3(OH).

GUESTEN R., FIEBIG D. and UCHIDA K.I.

Abstract (from CDS):

We report the detection of a 3.1±0.4mG magnetic field in the dense crescent of gas bordering the W3(OH) compact HII region. The Zeeman splitting in the highly excited ²{PI}_3/2 J=7/2 F=3⁺-3^– transition of OH was observed, in absorption against the radio continuum, with the MPIfR 100-m telescope. The derived field strength is, by far, the strongest ever reported from thermally excited, i.e., non-masing gas; it compares with the average field derived from the cluster of OH maser spots, thought to arise from within the same dense layer of gas. A quantitative anlysis reveals that magnetic pressure dominates the clump energetics by nearly an order of magnitude over other processes. A possible scenario is discussed in terms of a bow-shock model, in which the magnetic field is compressed in the cooled post-shock layer preceeding the compact HII region.

Abstract Copyright: ∼

Journal keyword(s): interstellar medium: clouds: individual: W 3 (OH) - radio lines: molecules (OH) - masers - magnetic field

Simbad objects: 1

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Number of rows : 1

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 W 3 OH	HII	02 27 04.1	+61 52 22						~	1064	2

Query : 1994A&A...286L..51G

Basic data :

NAME W 3 OH -- HII Region
Other object types:	`IR (IRAS,IRCO,...)`, `Rad (GRS,W,...)`, `HII (1996A&AS,[BNM96])`, `SFR (2016MNRAS)`, `Cld ([RE69])`, `Mas (OH)`
ICRS coord. (ep=J2000) :	`02 27 04.1 +61 52 22 [ ] D ~`
FK4 coord. (ep=B1950 eq=1950) :	`02 23 16.7 +61 38 54 [ ]`
Gal coord. (ep=J2000) :	`133.9481 +01.0637 [ ]`
VLSR :	`-46.4 -49.0 -43.8 [0.13] (Rad)` `1996A&AS..115...81B`

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`NAME W 3 OH`	`OH 133.9+01.1`	`[BNM96] 133.943+1.059`	`[SD73] 10`
`GRS G133.90 +01.10`	`RAFGL 331`	`[KCW94] 133.947+01.064`
`IRAS 02232+6138`	`WB89 422`	`[LG97] B02232+6138`
`IRCO 3556`	`W 3(OH)`	`[RE69] 022316.8+613854`

References (1064 between 1850 and 2026) (Total 1064)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : NAME W 3 OH

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IRAS 02232+6138 RAFGL 331

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