Fundamental relation in isolated galaxies, pairs, and triplets in the local universe

Abstract

In this work, we establish fundamental relations, for the first time, in isolated systems in the local universe (with 0.005$\le$z$\le$0.080), which can give insight into the underlying physics of star-formation. We use a sample of isolated galaxies to explore whether star formation is regulated by smooth secular processes. In addition, galaxies in physically bound isolated pairs and isolated triplets may also interact with each other, where interaction itself may enhance/regulate star-formation and the distribution of gas and metals within galaxies. We made use of published emission line fluxes information from the Sloan Digital Sky Survey (SDSS) to identify SF galaxies in the SDSS-based catalogue of isolated galaxies (SIG), isolated pairs (SIP), and isolated triplets (SIT). We also use this data to derive their aperture-corrected SFR (considering two different methods) and oxygen abundance, 12 + log(O/H), using bright lines calibrations. Stellar masses for SIG, SIP, and SIT galaxies were estimated by fitting their spectral energy distribution on the five SDSS bands. We compared our results with a sample of SF galaxies in the SDSS. We found that, on average, at a fixed stellar mass, the SIG SF galaxies have lower SFR values than Main Sequence (MS) SF galaxies in the SDSS and central galaxies in the SIP and SIT. On average, SIG galaxies have higher 12 + log(O/H) values than galaxies in the SIP, SIT, and comparison sample. When distinguishing between central and satellite galaxies in the SIP and SIT, centrals and SIG galaxies present similar values ($\sim$8.55) while satellites have values close to M33 ($\sim$8.4). Based on our results, we propose a ground level `nurture' free SFR-M${}_{\star }$ and gas metallicity-SFR-M${}_{\star }$ relations for SF galaxies in the local universe.

18 pages, 11 figures, 6 tables, accepted for publication in Astronomy & Astrophysics

References in corpus (39)

• The NumPy array: a structure for efficient numerical computation
• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• Star Formation in AEGIS Field Galaxies since z=1.1 : The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-Forming Galaxies
• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• UV Star Formation Rates in the Local Universe
• The Circumgalactic Medium
• The Mass-Metallicity Relation at z~2
• The Origin of the Galaxy Mass-Metallicity Relation and Implications for Galactic Outflows
• The Mass-Metallicity and the Fundamental Metallicity Relation revisited on a fully Te-based abundance scale for galaxies
• Clues to the Origin of the Mass-Metallicity Relation: Dependence on Star Formation Rate and Galaxy Size
• New fully empirical calibrations of strong-line metallicity indicators in star forming galaxies
• Deriving model-based T${}_e$-consistent chemical abundances in ionised gaseous nebulae
• Catalogues of isolated galaxies, isolated pairs, and isolated triplets in the local Universe
• The main sequence of star forming galaxies I. The local relation and its bending
• The AMIGA sample of isolated galaxies. V. Quantification of the isolation
• Stellar Absorption Line Analysis of Local Star-Forming Galaxies: The Relation Between Stellar Mass, Metallicity, Dust Attenuation and Star Formation Rate
• The ALMaQUEST Survey: The molecular gas main sequence and the origin of the star forming main sequence
• Star formation scaling relations at ~100 pc from PHANGS: Impact of completeness and spatial scale
• The ALMaQUEST Survey: V. The non-universality of kpc-scale star formation relations and the factors that drive them
• The AMIGA sample of isolated galaxies. IV. A catalogue of neighbours around isolated galaxies
• Star formation in isolated AMIGA galaxies: dynamical influence of bars
• Aperture-free star formation rate of SDSS star-forming galaxies
• The metallicity's fundamental dependence on both local and global galactic quantities
• The ALMaQUEST Survey: II. What drives central starbursts at z~0?
• Mass-Metallicity and Star Formation Rate in Galaxies: a complex relation tuned to stellar age
• On the 3D structure of the mass, metallicity, and SFR space for SF galaxies
• The effect of cosmic web filaments on galaxy evolution
• The SAMI Galaxy Survey: the drivers of gas and stellar metallicity differences in galaxies
• On the influence of the environment on galactic chemical abundances
• The fundamental metallicity relation emerges from the local anti-correlation between star formation rate and gas-phase metallicity existing in disk galaxies
• The Global Environment of Small Galaxy Systems
• Exploring Galaxy Evolution Time-Scales in Clusters: Insights from the Projected Phase Space
• Galaxy And Mass Assembly: Group and field galaxy morphologies in the star-formation rate - stellar mass plane
• SDSS-IV MaNGA: the chemical co-evolution of gas and stars in spiral galaxies
• What determines the HI gas content in galaxies?: morphological dependence of the HI gas fraction across M*-SFR plane
• Understanding the role of morphology and environment on the dynamical evolution of isolated galaxy triplets
• A MaNGA view of isolated galaxy mergers in the star-forming Main Sequence
• Estimating The Metallicity of Star-forming Early-type Galaxies
• Satellites and central galaxies in SDSS: the influence of interactions on their properties

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