Deep Echelle Spectrophotometry of S 311, a galactic H II Region Outside the Solar Circle

Abstract

We present echelle spectrophotometry of the Galactic H II region S 311. The data have been taken with the Very Large Telescope UVES echelle spectrograph in the 3100 to 10400 angstroms range. We have measured the intensities of 263 emission lines, 178 are permitted lines of H0, D0 (deuterium), He0, C0, C+, N0, N+, O0, O+, S+, Si0, Si+, Ar0 and Fe0; some of them are produced by recombination and others mainly by fluorescence. Physical conditions have been derived using different continuum and line intensity ratios. We have derived He+, C++ and O++ ionic abundances from pure recombination lines as well as abundances from collisionally excited lines for a large number of ions of different elements. We have obtained consistent estimations of t2 applying different methods. We have found that the temperature fluctuations paradigm is consistent with the t2(He I) vs. t2(H I) relation for H II regions, in contrast with what has been found for planetary nebulae. We report the detection of deuterium Balmer lines up to D6 in the blue wings of the hydrogen lines, which excitation mechanism seems to be continuum fluorescence.

arXiv comment13 pages, 12 tables, 5 figures, accepted for publication in MNRAS

References in corpus (23)

• A new calibration of stellar parameters of Galactic O stars
• Atmospheric NLTE-Models for the Spectroscopic Analysis of Blue Stars with Winds. II. Line-Blanketed Models
• A reappraisal of the chemical composition of the Orion nebula based on VLT echelle spectrophotometry
• Improving Predictions for Helium Emission Lines
• Mocassin: A fully three-dimensional Monte Carlo photoionization code
• The Chemical Composition of the Small Magellanic Cloud H II Region NGC 346 and the Primordial Helium Abundance
• Heavy elements in Galactic and Magellanic Cloud HII regions: recombination-line versus forbidden-line abundances
• Carbon and Oxygen Galactic Gradients: Observational Values from HII Region Recombination Lines
• The Chemical Composition of the 30 Doradus Nebula Derived from VLT Echelle Spectrophotometry
• Carbon in Spiral Galaxies from Hubble Space Telescope Spectroscopy
• Temperature Bias and the Primordial Helium Abundance Determination
• Optical Recombination Lines of Heavy-elements in Giant Extragalactic HII Regions
• Carbon Nitrogen, and Oxygen Galactic Gradients: A Solution to the Carbon Enrichment Problem
• Chemical abundances of the Galactic H II region NGC 3576 derived from VLT echelle spectrophotometry
• Radiative Transfer Effects in He I Emission Lines
• The [Fe IV] Discrepancy: Constraining the Iron Abundances in Nebulae
• An Empirical Test and Calibration of H II Region Diagnostics
• A Reexamination of Electron Density Diagnostics for Ionized Gaseous Nebulae
• VLT Echelle Spectrophotometry of the Planetary Nebula NGC 5307 and Temperature Variations
• Helium recombination spectra as temperature diagnostics for planetary nebulae
• Iron abundance in HII regions
• On the relationship between auroral and nebular oxygen line intensities in spectra of HII regions
• Modelling of aspherical nebulae. I. A quick pseudo-3D photoionization code

Cited by in corpus (59)

• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• Understanding Galaxy Evolution through Emission Lines
• The MOSDEF Survey: Electron Density and Ionization Parameter at $z\sim 2.3$
• New Strong Line Abundance Diagnostics for \HII Regions: Effects of $\kappa$-Distributed Electron Energies and New Atomic Data
• The primordial abundance of 4He: a self-consistent empirical analysis of systematic effects in a large sample of low-metallicity HII regions
• Eliminating Error in the Chemical Abundance Scale for Extragalactic HII Regions
• Keck HIRES Spectroscopy of Extragalactic HII Regions: C and O Abundances from Recombination Lines
• On the abundance discrepancy problem in HII regions
• The localized chemical pollution in NGC 5253 revisited: Results from deep echelle spectrophotometry
• "Counterpart" method for abundance determinations in HII regions
• On the O/H, Mg/H, Si/H and Fe/H Gas and Dust Abundance Ratios in Galactic and Extragalactic H II Regions
• Faint emission lines in the Galactic H II regions M16, M20 and NGC 3603
• The temperature and ionization structure of the emitting gas in HII galaxies: Implications for the accuracy of abundance determinations
• Carbon and oxygen in HII regions of the Magellanic Clouds: abundance discrepancy and chemical evolution
• The Galactic radial abundance gradients of C, N, O, Ne, S, Cl and Ar from deep spectra of H II regions
• Carbon and oxygen abundance gradients in NGC300 and M33 from optical recombination lines
• NGC 2579 and the carbon and oxygen abundance gradients beyond the solar circle
• The radial abundance gradient of oxygen towards the Galactic anticentre
• Balmer and Paschen jump temperature determinations in low-metallicity emission-line galaxies
• Gradients of chemical abundances in the Milky Way from HII regions: distances derived from Gaia EDR3 parallaxes and temperature inhomogeneities
• Balmer jump temperature determination in a large sample of low-metallicity H II regions
• Temperature inhomogeneities cause the abundance discrepancy in H II regions
• Density biases and temperature relations for DESIRED HII regions
• Early Results from GLASS-JWST. XXI: Rapid assembly of a galaxy at z=6.23 revealed by its C/O abundance
• Enrichment of the ISM by metal-rich droplets and the abundance bias in HII regions
• On the electron temperatures in high-metallicity HII regions
• JADES: The star-formation and chemical enrichment history of a luminous galaxy at z~9.43 probed by ultra-deep JWST/NIRSpec spectroscopy
• The Iron abundance in Galactic Planetary Nebulae
• The ionized gas at the center of IC 10: A possible localized chemical pollution by Wolf-Rayet stars
• Newly confirmed and high quality candidate Galactic SNRs uncovered from the AAO/UKST HAlpha survey
• The effects of spatially distributed ionisation sources on the temperature structure of HII region
• The Te[N II]-Te[O III] temperature relation in H II regions and the reliability of strong-line methods
• Small scale behavior of the physical conditions and the abundance discrepancy in the Orion nebula
• Bar effect on gas-phase abundance gradients. I. Data sample and chemical abundances
• Plasma Diagnostics for Planetary Nebulae and H II Regions Using the N II and O II Optical Recombination Lines
• Recombination coefficients for O II lines in nebular conditions
• Physical Conditions in Barnard's Loop, Components of the Orion-Eridanus Bubble, and Implications for the WIM Component of the ISM
• The radial abundance gradient of chlorine in the Milky Way
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy I: HH529II and III
• High resolution spectroscopy of the BCD galaxy Haro 15:I. Internal kinematics
• On the use of Sulphur as a tracer for abundances in galaxies
• Helium abundances and its radial gradient from the spectra of HII regions and ring nebulae of the Milky Way
• The last 5 Gyr of Galactic chemical evolution based on H II region abundances derived from a temperature independent method
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy II: HH204
• Temperature Structure and Metallicity in H II Regions
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy III: HH514
• Testing the existence of non-Maxwellian electron distributions in H II regions after assessing atomic data accuracy
• Properties of the ionized gas in HH202. I: Results from integral field spectroscopy with PMAS
• Gas-phase Fe/O and Fe/N abundances in Star-Forming Regions. Relations between nucleosynthesis, metallicity and dust
• Atomic Data Assessment with PyNeb: Radiative and Electron Impact Excitation Rates for [Fe II] and [Fe III]
• Photometric and spectroscopic studies of star-forming regions within Wolf-Rayet galaxies
• The massive multiple system HD 64315
• Small-spatial scale variations of nebular properties and the abundance discrepancy in three Galactic HII regions
• Giant HII Regions in NGC 7479 & NGC 6070
• On the non-thermal kappa-distributed electrons in planetary nebulae and HII regions: the kappa index and its correlations with other nebular properties
• Electron Temperatures of Planetary Nebulae Determined from the He I Discontinuities
• Metallicity gradients in M31, M33, NGC 300 and the Milky Way using abundances of different elements
• SDSS-V LVM: A spatially resolved study of the physical conditions and the chemical abundance discrepancy in the Lagoon Nebula (M 8)
• The ADF and the t${}^2$ formalism in H II regions based on the upper mass limit of the IMF for the MW