P-MaNGA: Emission Lines Properties - Gas Ionisation and Chemical Abundances from Prototype Observations

Abstract

MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) is a SDSS-IV survey that will obtain spatially resolved spectroscopy from 3600 Å to 10300 Å for a representative sample of over 10000 nearby galaxies. In this paper we present the analysis of nebular emission line properties in 14 galaxies obtained with P-MaNGA, a prototype of the MaNGA instrument. Using spatially resolved diagnostic diagrams we find extended star formation in galaxies that are centrally dominated by Seyfert/LINER-like emission, which illustrates that galaxy characterisations based on single fibre spectra are necessarily incomplete. We observe extended LINER-like emission (up to $1{\mathrm{R}}_{\mathrm{e}}$) in three galaxies. We make use of the $\mathrm{EW}(\mathrm{H}\alpha )$ to argue that the observed emission is consistent with ionisation from hot evolved stars. We derive stellar population indices and demonstrate a clear correlation between ${\mathrm{D}}_{\mathrm{n}}(4000)$ and $\mathrm{EW}(\mathrm{H}{\delta }_{\mathrm{A}})$ and the position in the ionisation diagnostic diagram: resolved galactic regions which are ionised by a Seyfert/LINER-like radiation field are also devoid of recent star formation and host older and/or more metal rich stellar populations. We also detect extraplanar LINER-like emission in two highly inclined galaxies, and identify it with diffuse ionised gas. We investigate spatially resolved metallicities and find a positive correlation between metallicity and star formation rate (SFR) surface density. We study the relation between N/O vs O/H on resolved scales. We find that, at given N/O, regions within individual galaxies are spread towards lower metallicities, deviating from the sequence defined by galactic central regions as traced by Sloan $3^{\prime \prime }$ fibre spectra. We suggest that the observed dispersion can be a tracer for gas flows in galaxies: infalls of pristine gas and/or the effect of a galactic fountain.

37 pages, 28 figures, accepted to MNRAS after minor revision, update references

References in corpus (22)

• The Host Galaxies and Classification of Active Galactic Nuclei
• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• The MaNGA Integral Field Unit Fiber Feed System for the Sloan 2.5 m Telescope
• The Universal Relation of Galactic Chemical Evolution: The Origin of the Mass-Metallicity Relation
• Reconstructing the Subsurface Three-Dimensional Magnetic Structure of A Solar Active Region Using SDO/HMI Observations
• CALIFA, the Calar Alto Legacy Integral Field Area survey. II. First public data release
• CALIFA, the Calar Alto Legacy Integral Field Area survey. III. Second public data release
• Ionized gas outflows and global kinematics of low-z luminous star forming galaxies
• Deriving model-based T${}_e$-consistent chemical abundances in ionised gaseous nebulae
• Stellar Population gradients in galaxy discs from the CALIFA survey
• The SAMI Galaxy Survey: Shocks and Outflows in a normal star-forming galaxy
• The Abundance Properties of Nearby Late-Type Galaxies.I. The Data
• Insights on the stellar mass-metallicity relation from the CALIFA survey
• A Consistent Study of Metallicity Evolution at 0.8 < z < 2.6
• The SAMI Galaxy Survey: Cubism and covariance, putting round pegs into square holes
• Imprints of galaxy evolution on H ii regions Memory of the past uncovered by the CALIFA survey
• The metal abundance of circumnuclear star forming regions in early type spirals. Spectrophotometric observations
• On the Determination of N and O Abundances in Low Metallicity Systems
• Discrepancies between the [OIII] and [SIII] Temperatures in HII Regions
• Dynamics and Metallicity of Far-IR Selected Galaxies

Cited by in corpus (49)

• The Data Reduction Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey
• SDSS-IV MaNGA: The Impact of Diffuse Ionized Gas on Emission-line Ratios, Interpretation of Diagnostic Diagrams, and Gas Metallicity Measurements
• SDSS-IV MaNGA: Spatially resolved star formation histories in galaxies as a function of galaxy mass and type
• SDSS IV MaNGA: The global and local stellar mass assemby histories of galaxies
• SDSS IV MaNGA - The spatially resolved transition from star formation to quiescence
• The SAMI Galaxy Survey: Exploring the gas-phase Mass-Metallicity Relation
• Star formation scaling relations at ~100 pc from PHANGS: Impact of completeness and spatial scale
• P-MaNGA: Gradients in Recent Star Formation Histories as Diagnostics for Galaxy Growth and Death
• Dissecting Galaxies: Spatial and Spectral Separation of Emission Excited by Star Formation and AGN Activity
• From 'bathtub' galaxy evolution models to metallicity gradients
• Oxygen abundance maps of CALIFA galaxies
• Dissecting Galaxies: Separating Star Formation, Shock Excitation and AGN Activity in the Central Region of NGC 613
• The KLEVER survey: Nitrogen abundances at $z\sim$2 and probing the existence of a fundamental nitrogen relation
• SDSS-IV MaNGA: Faint quenched galaxies I- Sample selection and evidence for environmental quenching
• The many faces of LINER-like galaxies: a WISE view
• Variations in the ${\Sigma }_{\mathrm{SFR}}-{\Sigma }_{\mathrm{mol}}-{\Sigma }_{\star }$ plane across galactic environments in PHANGS galaxies
• SDSS-IV MaNGA: spatially resolved dust attenuation in spiral galaxies
• Milky Way Analogues in MaNGA: Multi-Parameter Homogeneity and Comparison to the Milky Way
• Metallicity Gradient of Barred Galaxies with TYPHOON
• CECILIA: The Faint Emission Line Spectrum of z~2-3 Star-forming Galaxies
• The SAMI Galaxy Survey: the difference between ionised gas and stellar velocity dispersions
• Chemical abundances in the nuclear region of nearby galaxies from the Palomar Survey
• Evidence for the Accretion of Gas in Star-Forming Galaxies: High N/O Abundances in Regions of Anomalously-Low Metallicity
• Spatially-resolved chemodynamics of the starburst dwarf galaxy CGCG 007-025: Evidence for recent accretion of metal-poor gas
• Integral Field Spectroscopy of the inner kpc of the elliptical galaxy NGC 5044
• OMEGA -- OSIRIS Mapping of Emission-line Galaxies in A901/2: II. -- Environmental influence on integrated star formation properties and AGN activity
• Suppressed CO emission and high G/D ratios in z=2 galaxies with sub-solar gas-phase metallicity
• Spatially resolved BPT mapping of nearby Seyfert 2 galaxies
• High Resolution HST Imaging Survey of Local Star-Forming Galaxies I: Spatially-Resolved Obscured Star Formation with H$\alpha$ and Paschen-$\beta$ Recombination Lines
• Metallicity calibrations of low star-forming galaxies: the influence of a stochastic IMF
• Conversions between gas-phase metallicities in MaNGA
• SDSS-IV MaNGA: A serendipitous observation of a potential gas accretion event
• Unexpected dancing partners: Tracing the coherence between the spin and motion of dark matter halos
• Probing star formation and feedback in dwarf galaxies. Integral field view of the blue compact galaxy Tololo 1937-423
• Star Formation and Chemical Enrichment in Protoclusters
• A MUSE View of the Core of the Giant Low Surface Brightness Galaxy Malin 1
• Investigating the Origin of Observed Central Dips in Radial Metallicity Profiles
• The properties and environment of very young galaxies in the local Universe
• Refining the E+A Galaxy: A Spatially Resolved Spectrophotometric Sample of Nearby Post-starburst Systems in SDSS-IV MaNGA (MPL-5)
• Deciphering the Origin of Ionized Gas in IC 1459 with VLT/MUSE
• Unveiling the kinematics of a central region in the triple AGN host NGC 7733-7734 interacting group
• Mapping the Excitation Mechanisms in the LINER I Active Galactic Nucleus NGC 5005: Positive Feedback and a Thin LINER Cocoon
• Chemodynamic evidence of pristine gas accretion in the void galaxy VGS 12
• Tracing nitrogen enrichment across cosmic time with JWST
• Digging deeper into NGC 6868 II: ionized gas and excitation mechanism
• Chemical enrichment in LINERs from MaNGA. I. Tracing Oxygen and Nitrogen Nuclear Abundances in LINERs with Varied Ionizing Sources
• SDSS-IV MaNGA: Exploring the local scaling relations for N/O
• The relationship between warm and hot gas-phase metallicity in massive elliptical galaxies and the influence of AGN feedback
• Clumpy Starburst in a Local Dwarf Galaxy, NGC 1522