Information on Service 'Reference HII Regions for Abundance Determination'

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A table containing reference data for HII regions. We also give a source code to compute abundances and electron temperatures in HII regions from strong emission lines.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Reference HII Regions for Abundance Determination'

Service Documentation

The data available here can be used the calculation of the abundances and temperatures in one or many HII regions.

We have prepared a FORTRAN program to do this, available in the archive Cmethod.tar.gz

The archive includes a README explaining how to use the program.

Overview

You can access this service using:

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Other services provided on the underlying data include:

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
logN2 log(N_2) Log of [NII] N_2 line intensity relative to Hβ N/A spect.line.intensity;arith.ratio
logR2 log(R_2) Log of [OII] R_2 line intensity relative to Hβ N/A spect.line.intensity;arith.ratio
logR3 log(R_3) Log of [OIII] R_3 line intensity relative to Hβ N/A spect.line.intensity;arith.ratio
logS2 log(S_2) Log of [SII] S_2 line intensity relative to Hβ N/A spect.line.intensity;arith.ratio
region_name HII Region Name of the HII region. N/A meta.name;src
t3 t_3 Electron temperature derived as given in t3src, reduced to t_3([O III]) K phys.temperature.electron

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
hostAlpha Host RA ICRS RA of host object (from Simbad) N/A pos.eq.ra;meta.main
hostDelta Host Dec ICRS Dec of host object (from Simbad) N/A pos.eq.dec;meta.main
ident Id Identifier of the HII region in this catalog N/A meta.id;meta.main
logN2 log(N_2) Log of [NII] N_2 line intensity relative to Hβ Note N2 N/A spect.line.intensity;arith.ratio
logR2 log(R_2) Log of [OII] R_2 line intensity relative to Hβ Note R2 N/A spect.line.intensity;arith.ratio
logR3 log(R_3) Log of [OIII] R_3 line intensity relative to Hβ Note R3 N/A spect.line.intensity;arith.ratio
logS2 log(S_2) Log of [SII] S_2 line intensity relative to Hβ N/A spect.line.intensity;arith.ratio
n_h 12+log(N/H) T_e-based nitrogen abundance given as 12+log(N/H) N/A phys.abund;arith.ratio
o_h 12+log(O/H) T_e-based oxygen abundance given as 12+log(O/H) N/A phys.abund;arith.ratio
region_name HII Region Name of the HII region. N/A meta.name;src
src Source Reference to the source of the data quoted. N/A meta.bib.bicode
t3 t_3 Electron temperature derived as given in t3src, reduced to t_3([O III]) K phys.temperature.electron
t3src t3 src Lines used for determination of t_3 N/A meta.code;phys.temperatur.electron

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
ident Id Identifier of the HII region in this catalog N/A meta.id;meta.main 1
hostAlpha Host RA ICRS RA of host object (from Simbad) N/A pos.eq.ra;meta.main 1
hostDelta Host Dec ICRS Dec of host object (from Simbad) N/A pos.eq.dec;meta.main 1
logR3 log(R_3) Log of [OIII] R_3 line intensity relative to Hβ Note R3 N/A spect.line.intensity;arith.ratio 10
logR2 log(R_2) Log of [OII] R_2 line intensity relative to Hβ Note R2 N/A spect.line.intensity;arith.ratio 10
logN2 log(N_2) Log of [NII] N_2 line intensity relative to Hβ Note N2 N/A spect.line.intensity;arith.ratio 10
logS2 log(S_2) Log of [SII] S_2 line intensity relative to Hβ N/A spect.line.intensity;arith.ratio 10
o_h 12+log(O/H) T_e-based oxygen abundance given as 12+log(O/H) N/A phys.abund;arith.ratio 15
n_h 12+log(N/H) T_e-based nitrogen abundance given as 12+log(N/H) N/A phys.abund;arith.ratio 15
t3 t_3 Electron temperature derived as given in t3src, reduced to t_3([O III]) K phys.temperature.electron 15
region_name HII Region Name of the HII region. N/A meta.name;src 15
t3src t3 src Lines used for determination of t_3 N/A meta.code;phys.temperatur.electron 20
src Source Reference to the source of the data quoted. N/A meta.bib.bicode 20

Copyright, License, Acknowledgements

If you use the data or software distributed here, please reference 2012MNRAS.424.2316P. This research was funded in part by SFB 881 "The Milky Way Galaxy".

VOResource XML (that's something exclusively for VO nerds)

Note N2

The N_2 line intensity is the sum of the line intensities for [NII] at 654.8 and 658.4 nm.

Note R2

The R_2 line intensity is the sum of the line intensities for [OII] at 372.7 and 372.9 nm.

Note R3

The R_3 line intensity is the sum of the line intensities for [OIII] at 495.9 and 500.7 nm.