The EDGE-CALIFA Survey: Exploring the Star Formation Law through Variable Selection

Abstract

We present a multilinear analysis to determine the significant predictors of star formation in galaxies using the combined EDGE-CALIFA sample of galaxies. We analyze 1845 kpc-scale lines of sight across 39 galaxies with molecular line emission measurements from EDGE combined with optical IFU data drawn from CALIFA. We use the Least Absolute Shrinkage and Selection Operator (LASSO) to identify significant factors in predicting star formation rates. We find that the local star formation rate surface density is increased by higher molecular gas surface densities and stellar surface densities. In contrast, we see lower star formation rates in systems with older stellar populations, higher gas- and stellar-phase metallicities and larger galaxy masses. We also find a significant increase in star formation rate with galactocentric radius normalized by the disk scale length, which suggests additional parameters regulating star formation rate not explored in this study.

Accepted by MNRAS

References in corpus (51)

• Scikit-learn: Machine Learning in Python
• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Star Formation in Galaxies Along the Hubble Sequence
• The Global Schmidt Law in Star Forming Galaxies
• The Host Galaxies of AGN
• Cosmic Star Formation History
• Star Formation in the Milky Way and Nearby Galaxies
• The CO-to-H2 Conversion Factor
• The Star Formation Efficiency in Nearby Galaxies: Measuring Where Gas Forms Stars Effectively
• The Star Formation Law in Nearby Galaxies on Sub-Kpc Scales
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• HyperLEDA. III. The catalogue of extragalactic distances
• Morphological quenching of star formation: making early-type galaxies red
• Black holes in galaxy mergers: The formation of red elliptical galaxies
• Different star formation laws for disks versus starbursts at low and high redshifts
• SPARC: Mass Models for 175 Disk Galaxies with Spitzer Photometry and Accurate Rotation Curves
• The Relationship Between Gas Content and Star Formation in Molecule-Rich Spiral Galaxies
• Molecular Gas and Star Formation in Nearby Disk Galaxies
• The O3N2 and N2 abundance indicators revisited: improved calibrations based on CALIFA and Te-based literature data
• Star Formation in NGC 5194 (M51a). II. The Spatially-Resolved Star Formation Law
• COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies: I. Relations between H2, HI, stellar content and structural properties
• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• Regulation of Star Formation Rates in Multiphase Galactic Disks: a Thermal/Dynamical Equilibrium Model
• COLD GASS, an IRAM Legacy Survey of Molecular Gas in Massive Galaxies: II. The non-universality of the Molecular Gas Depletion Timescale
• Early-type galaxies in the SDSS. III. The Fundamental Plane
• Feedback, Disk Self-regulation and Galaxy Formation
• The CALIFA survey across the Hubble sequence: Spatially resolved stellar population properties in galaxies
• CALIFA: a diameter-selected sample for an integral field spectroscopy galaxy survey
• The impact of interactions, bars, bulges, and AGN on star formation efficiency in local massive galaxies
• Cloud-Scale Molecular Gas Properties in 15 Nearby Galaxies
• CALIFA, the Calar Alto Legacy Integral Field Area survey. III. Second public data release
• The star formation history of CALIFA galaxies: Radial structures
• Gas Kinematics on GMC scales in M51 with PAWS: cloud stabilization through dynamical pressure
• Star formation along the Hubble sequence: Radial structure of the star formation of CALIFA galaxies
• The EDGE-CALIFA Survey: Interferometric Observations of 126 Galaxies with CARMA
• Extended Schmidt Law: Role Of Existing Stars In Current Star Formation
• Cloud Scale ISM Structure and Star Formation in M51
• SDSS IV MaNGA: The global and local stellar mass assemby histories of galaxies
• Orbital decomposition of CALIFA spiral galaxies
• SDSS IV MaNGA - The spatially resolved transition from star formation to quiescence
• A Model for the Onset of Self-gravitation and Star Formation in Molecular Gas Governed by Galactic Forces: I. Cloud-scale Gas Motions
• The EDGE-CALIFA Survey: Molecular and Ionized Gas Kinematics in Nearby Galaxies
• The spatially resolved star formation history of CALIFA galaxies: Cosmic time scales
• The cosmic evolution of the spatially-resolved star formation rate and stellar mass of the CALIFA survey
• The EDGE-CALIFA survey: Variations in the Molecular Gas Depletion Time in Local Galaxies
• Re-visiting the extended Schmidt law: the important role of existing stars in regulating star formation
• The influence of the cluster environment on the star formation efficiency of 12 Virgo spiral galaxies
• The EDGE-CALIFA survey: the influence of galactic rotation on the molecular depletion time across the Hubble sequence
• The evolution of the mass-metallicity relation in SDSS galaxies uncovered by astropaleontology
• The JCMT Nearby Galaxies Legacy Survey X. Environmental Effects on the Molecular Gas and Star Formation Properties of Spiral Galaxies

Cited by in corpus (28)

• Spatially-Resolved Spectroscopic Properties of Low-Redshift Star-Forming Galaxies
• The cold interstellar medium of galaxies in the Local Universe
• Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies
• The ALMaQUEST Survey: The molecular gas main sequence and the origin of the star forming main sequence
• SDSS-IV MaNGA: Effects of Morphology in the global and local Star Formation Main Sequences
• Star formation scaling relations at ~100 pc from PHANGS: Impact of completeness and spatial scale
• The ALMaQUEST Survey: III. Scatter in the resolved star forming main sequence is primarily due to variations in star formation efficiency
• The ALMaQUEST Survey: V. The non-universality of kpc-scale star formation relations and the factors that drive them
• The EDGE-CALIFA survey: The local and global relations between ${\Sigma }_{\ast }$ , ${\Sigma }_{SFR}$ and ${\Sigma }_{mol}$ that regulate star-formation
• A panchromatic spatially resolved analysis of nearby galaxies -- II. The main sequence - gas relation at sub-kpc scale in grand-design spirals
• ALMaQUEST -- IV. The ALMA-MaNGA QUEnching and STar formation (ALMaQUEST) Survey
• The EDGE-CALIFA survey: exploring the role of the molecular gas on the galaxy star formation quenching
• EDGE-CALIFA survey: Self-regulation of Star formation at kpc scales
• The volumetric star formation law for nearby galaxies -- Extension to dwarf galaxies and low-density regions
• Variations in the ${\Sigma }_{\mathrm{SFR}}-{\Sigma }_{\mathrm{mol}}-{\Sigma }_{\star }$ plane across galactic environments in PHANGS galaxies
• SDSS-IV MANGA: A Star Formation -- Baryonic Mass Relation at Kpc Scales
• A re-assessment of strong line metallicity conversions in the machine learning era
• Testing the models of X-ray driven photoevaporation with accreting stars in the Orion Nebula Cluster
• From haloes to galaxies -- II. The fundamental relations in star formation and quenching
• The EDGE-CALIFA survey: The resolved star formation efficiency and local physical conditions
• Multiwavelength Bulge-Disk Decomposition for the Galaxy M81 (NGC 3031). I. Morphology
• First results from SMAUG: Insights into star formation conditions from spatially-resolved ISM properties in TNG50
• A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) XVII. Statistical properties of individual HII regions in unperturbed systems
• The EDGE-CALIFA survey: Star formation relationships for galaxies at different stages of their evolution
• MIGHTEE-HI: The star-forming properties of HI selected galaxies
• Kennicutt-Schmidt relation of galaxies over 13 billion years in the COLIBRE hydrodynamical simulations
• MASCOT -- An ESO-ARO legacy survey of molecular gas in nearby SDSS-MaNGA galaxies: I. first data release, and global and resolved relations between H_2 and stellar content
• The local and global relations between ${\Sigma }_{\star }$ , ${\Sigma }_{\mathrm{SFR}}$ and ${\Sigma }_{\mathrm{mol}}$ that regulate star-formation