Recombination coefficients for O II lines in nebular conditions

Abstract

We present the results of a calculation of recombination coefficients for O^{2+} + e^- using an intermediate coupling treatment that fully accounts for the dependence of the distribution of population among the ground levels of O^{2+} on electron density and temperature. The calculation is extended down to low electron temperatures where dielectronic recombination arising from Rydberg states converging on the O^{2+} ground levels is an important process. The data, which consist of emission coefficients for 8889 recombination lines and recombination coefficients for the ground and metastable states of O^+ are in Cases A, B and C, and are organised as a function of the electron temperature and number density, as well as wavelength. An interactive fortran 77 data server is also provided as an accessory for mining the line emission coefficients and obtaining Lagrange interpolated values for any choice of the two variables between the explicitly provided values for any set of wavelengths. Some illustrations of the application of the new data to nebular observations are also provided.

15 pages, 7 figures, 6 tables

References in corpus (11)

• Resolving the electron temperature discrepancies in HII Regions and Planetary Nebulae: kappa-distributed electrons
• Keck HIRES Spectroscopy of Extragalactic HII Regions: C and O Abundances from Recombination Lines
• Chemical abundances for Hf 2-2, a planetary nebula with the strongest known heavy element recombination lines
• Elemental abundances of Galactic bulge planetary nebulae from optical recombination lines
• Electron Temperatures and Free-Electron Energy Distributions of Nebulae from C II Dielectronic Recombination Lines
• Emission and recombination coefficients for hydrogen with kappa-distributed electron energies
• Very Large Telescope deep echelle spectroscopy of Galactic planetary nebulae NGC 6153, M 1-42 and Hf 2-2
• Effective collision strengths for excitation and de-excitation of nebular [O III] optical and infrared lines with kappa distributed electron energies
• On the non-thermal kappa-distributed electrons in planetary nebulae and HII regions: the kappa index and its correlations with other nebular properties
• The abundance discrepancy factor and t^2 in nebulae: are non-thermal electrons the culprits?
• Physical conditions derived from OII recombination lines in planetary nebulae and their implications

Cited by in corpus (24)

• Confirmation of the link between central star binarity and extreme abundance discrepancy factors in planetary nebulae
• Temperature inhomogeneities cause the abundance discrepancy in H II regions
• Density biases and temperature relations for DESIRED HII regions
• Atomic Data Assessment with PyNeb
• MUSE spectroscopy of planetary nebulae with high abundance discrepancies
• A Preview of JWST Metallicity Studies at Cosmic Noon: The First Detection of Auroral [O II] Emission at High Redshift
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy I: HH529II and III
• Accurate Oxygen Abundance of Interstellar Gas in Mrk 71 from Optical and Infrared Spectra
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy II: HH204
• Bi-abundance photoionization models of planetary nebulae: determining the amount of Oxygen in the metal rich component
• Polarimetry and Spectroscopy of the `Oxygen Flaring' DQ Herculis-like nova: V5668 Sagittarii (2015)
• The impact of spectra quality on nebular abundances
• NGC 6153: Reality is complicated
• MUSE spectroscopy of the high abundance discrepancy planetary nebula NGC 6153
• Physical conditions and chemical abundances in PN M 2-36. Results from deep echelle observations
• Evolution of Hen\,3-1357, the Stingray Nebula
• Physical and chemical properties of Wolf-Rayet planetary nebulae
• Abundance Discrepancy Factors in high density planetary nebulae
• Resonant Temperature Fluctuations in Nebulae Ionized by Short-Period Binary Stars
• AtomNeb: IDL Library and Python Package for Atomic Data of Ionized Nebulae
• Can the Kappa-distributed electron energies account for the intensity ratios of O II lines in photoionized gaseous nebulae?
• Kinematical analysis of PNe with high ADF: Hf 2-2 and M 1-42
• Physical Conditions and Chemical Abundances of the Variable Planetary Nebula IC 4997
• SDSS-V LVM: A spatially resolved study of the physical conditions and the chemical abundance discrepancy in the Lagoon Nebula (M 8)