2014MNRAS.440.2581S

Query : 2014MNRAS.440.2581S

2014MNRAS.440.2581S - Mon. Not. R. Astron. Soc., 440, 2581-2587 (2014/May-3)

The continuum emission spectrum of Hf 2-2 near the Balmer limit and the ORL versus CEL abundance and temperature discrepancy.

STOREY P.J. and SOCHI T.

Abstract (from CDS):

The continuum spectrum of the planetary nebula Hf 2-2 close to the Balmer discontinuity is modelled in the context of the long-standing problem of the abundance and temperature discrepancy found when analysing optical recombination lines and collisionally excited forbidden lines in nebulae. Models are constructed using single and double Maxwell-Boltzmann distributions as well as κ-distributions for the energies of the free electrons. New results for the necessary continuum and line emission coefficients are presented calculated with κ-distributed energies. The best fit to the observed continuum spectrum is found to be a model comprising two components with dramatically different temperatures and with a Maxwell-Boltzmann distribution of electron energies. On the basis of a χ2 analysis, this model is strongly favoured over a model with κ-distributed electron energies.

Journal keyword(s): atomic processes - radiation mechanisms: general - methods: data analysis - ISM: abundances - planetary nebulae: general - planetary nebulae: individual: Hf 2-2

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	PN Hf 2-2	PN	18 32 30.9015918072	-28 43 20.276106312			15.90			~	110	0

Query : 2014MNRAS.440.2581S

Basic data :

PN Hf 2-2 -- Planetary Nebula

PN (2013MNRAS,Hen,...), * (GSC2,Gaia), EB* (2022yCat), G (ESO), IR (IRAS)

18 32 30.9015918072 -28 43 20.276106312 (Optical) [ 0.0764 0.0725 90 ] A 2020yCat.1350....0G

18 29 20.8127953367 -28 45 34.812361843 [ 0.0764 0.0725 90 ]

005.1379186129431 -08.9029403580460 [ 0.0764 0.0725 90 ]

-1.660 -6.320 [0.094 0.076 90] A 2020yCat.1350....0G

V(km/s) 56 [~] / z(~) 0.000187 [~] / cz 56.01 [~] D 1999ApJ...515..610B

0.284 [0.0858] A 2020yCat.1350....0G

V 15.90 [~] E ~

G 17.155121 [0.006360] C 2020yCat.1350....0G

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`ESO 457-16`	`IRAS 18293-2845`	`PN Hf 2-2`	`WRAY 16-414`
`GSC2 S301301024481`	`PK 005-08 1`	`PN Sa 3-135`	`Gaia DR2 4048497024309080064`
`Hen 2-407`	`PN G005.1-08.9`	`SCM 207`	`Gaia DR3 4048497024309080064`

References (110 between 1850 and 2026) (Total 110)
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 : PN Hf 2-2

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IRAS 18293-2845 PN G005.1-08.9 Gaia DR2 4048497024309080064 Gaia DR3 4048497024309080064

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