2000MNRAS.315..241W

Query : 2000MNRAS.315..241W

2000MNRAS.315..241W - Mon. Not. R. Astron. Soc., 315, 241-247 (2000/June-3)

Hydrogen recombination lines from the Gum nebula.

WOERMANN B., GAYLARD M.J. and OTRUPCEK R.

Abstract (from CDS):

Hydrogen recombination lines in the H156α and H139α transitions have been detected at four widely separated positions in the Gum nebula. This confirms that the radio continuum emission seen in parts of the nebula is predominantly bremsstrahlung rather than synchrotron emission.

The derived electron temperatures and emission measures are in the range 4200 to 8500K and 220 to 470pc.cm–6 respectively. This is consistent with the presence of a low-density, photoionized plasma. The linewidth observed at the position away from the edge of the nebula is significantly larger than those near the edge of the nebula. Together with the negative line velocity observed at this position, this suggests there is systematic expansion of the near side of the nebula.


Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): Hii regions - ISM: individual: Gum nebula - supernova remnants - radio lines: ISM

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 GUM Nebula ISM 07 43 -42.1           ~ 454 1

Query : 2000MNRAS.315..241W

Basic data :
NAME GUM Nebula -- Interstellar Medium Object
Other object types: otypes_help 		ISM ()
ICRS coord. (ep=J2000) : 		07 43 00.0 -42 06 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		07 41 20.6 -41 58 48 [ ]
Gal coord. (ep=J2000) : 		255.8336 -09.1133 [ ]
Angular size (arcmin): 		300 300 ~ (~) D 2018MNRAS.474.4672L
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Identifiers (1) :
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NAME GUM Nebula

References (454 between 1850 and 2026) (Total 454)
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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