Converting H$\alpha$ Luminosities into Star Formation Rates

Abstract

The recent finding that the IGIMF (integrated galaxial initial stellar mass function) composed of all newly formed stars in all young star clusters has, in dependence of the SFR, a steeper slope in the high mass regime than the underlying canonical IMF of each star cluster offers new insights into the galactic star formation process: The classical linear relation between the SFR and the produced H$\alpha$ luminosity is broken and SFRs are always underestimated. Our new relation is likely to lead to a revision of the cosmological SFH.

2 pages, 4 figures, To be published in the proceedings of "Pathways Through an Eclectic Universe", ed. T. Mahoney, A. Vazdekis, and J. Knapen

References in corpus (26)

• Stellar population synthesis at the resolution of 2003
• On the variation of the Initial Mass Function
• The Global Schmidt Law in Star Forming Galaxies
• The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
• Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity
• A standard stellar library for evolutionary synthesis: I. Calibration of theoretical spectra
• Radioactive 26Al and massive stars in the Galaxy
• A standard stellar library for evolutionary synthesis: II. The M dwarf extension
• Galactic-Field IMFs of Massive Stars
• Stellar evolution with rotation X: Wolf-Rayet star populations at solar metallicity
• Massive star formation: Nurture, not nature
• The maximum stellar mass, star-cluster formation and composite stellar populations
• An upper limit to the masses of stars
• Evidence for a fundamental stellar upper mass limit from clustered star formation
• A standard stellar library for evolutionary synthesis. III. Metallicity calibration
• The Luminosity Function of Star Clusters in Spiral Galaxies
• The Variation of Integrated Star IMFs among Galaxies
• Implications for the formation of star clusters from extra-galactic star-formation rates
• A Possible Origin of the Mass-Metallicity Relation of Galaxies
• Statistical Confirmation of a Stellar Upper Mass Limit
• A highly abnormal massive star mass function in the Orion Nebula cluster and the dynamical decay of trapezia systems
• Star Formation in Sculptor Group Dwarf Irregular Galaxies and the Nature of "Transition" Galaxies
• Pismis 24-1: The Stellar Upper Mass Limit Preserved
• Is the Initial Mass Function of Low Surface Brightness Galaxies Dominated by Low Mass Stars?
• Young massive star clusters in M51
• A new method to derive star formation histories of galaxies from their star cluster distributions

Cited by in corpus (102)

• Star Formation in the Milky Way and Nearby Galaxies
• A Universal Stellar Initial Mass Function? A Critical Look at Variations
• Comparison of H-alpha and UV Star Formation Rates in the Local Volume: Systematic Discrepancies for Dwarf Galaxies
• The applicability of FIR fine-structure lines as Star Formation Rate tracers over wide ranges of metallicities and galaxy types
• On the fraction of star formation occurring in bound stellar clusters
• Evidence for a Non-Uniform Initial Mass Function in the Local Universe
• The stellar and sub-stellar IMF of simple and composite populations
• The Spatially Resolved Star Formation Law from Integral Field Spectroscopy: VIRUS-P Observations of NGC 5194
• Modeling the Effects of Star Formation Histories on Halpha and Ultra-Violet Fluxes in Nearby Dwarf Galaxies
• Dwarf Galaxy Starburst Statistics in the Local Volume
• The impact of the metallicity and star formation rate on the time-dependent galaxy-wide stellar initial mass function
• High mass star formation in normal late-type galaxies: observational constraints to the IMF
• The dynamical state of stellar structure in star-forming regions
• The Extreme Hosts of Extreme Supernovae
• Stochastic star formation and a (nearly) uniform stellar initial mass function
• SLUG -- Stochastically Lighting Up Galaxies. III: A Suite of Tools for Simulated Photometry, Spectroscopy, and Bayesian Inference with Stochastic Stellar Populations
• GALEX Ultraviolet Imaging of Dwarf Galaxies and Star Formation
• Leo P: An Unquenched Very Low-Mass Galaxy
• A Closer look at Bursty Star Formation with $L_{H\alpha }$ and $L_{UV}$ Distributions
• The mmax-Mecl relation, the IMF and IGIMF: probabilistically sampled functions?
• Diverging UV and Halpha fluxes of star forming galaxies predicted by the IGIMF theory
• A comparison between star formation rate diagnostics and rate of core collapse supernovae within 11 Mpc
• The optimally-sampled galaxy-wide stellar initial mass function - Observational tests and the publicly available GalIMF code
• Dense Stellar Populations: Initial Conditions
• The galaxy-wide IMF of dwarf late-type to massive early-type galaxies
• Star formation properties in the Local Volume galaxies via $H\alpha$ and FUV fluxes
• Dependency of dynamical ejections of O stars on the masses of very young star clusters
• On the Interstellar Medium and Star Formation Demographics of Galaxies in the Local Universe
• The Star Formation Demographics of Galaxies in the Local Volume
• The First Galaxies: Signatures of the Initial Starburst
• Properties of hierarchically forming star clusters
• The Bursty Star Formation Histories of Low-mass Galaxies at $0.4<z<1$ Revealed by Star Formation Rates Measured from H$\beta$ and FUV
• Clustered star formation as a natural explanation of the Halpha cutoff in disc galaxies
• Radial distribution of stars, gas and dust in SINGS galaxies. III. Modeling the evolution of the stellar component in galaxy disks
• The Star Forming Main Sequence of Dwarf Low Surface Brightness Galaxies
• On the association between core-collapse supernovae and HII regions
• The chemical evolution of galaxies within the IGIMF theory: the [alpha/Fe] ratios and downsizing
• Variations of the initial mass function in semi-analytical models: implications for the mass assembly and the chemical enrichment of galaxies in the GAEA model
• Stochasticity, a variable stellar upper-mass limit, binaries and star-formation rate indicators
• Characterizing the Brown Dwarf Formation Channels from the Initial Mass Function and Binary-star Dynamics
• Maximum stellar mass versus cluster membership number revisited
• The fundamental gas depletion and stellar-mass buildup times of star forming galaxies
• Mass distributions of star clusters for different star formation histories in a galaxy cluster environment
• The ACS Nearby Galaxy Survey Treasury II. Young Stars and their Relation to Halpha and UV Emission Timescales in the M81 Outer Disk
• The most massive stars in very young star clusters with a limited mass: Evidence favours significant self-regulation in the star formation processes
• The Young, Massive, Star Cluster Sandage-96 After the Explosion of SN 2004dj in NGC 2403
• Chemo-dynamical evolution of tidal dwarf galaxies. I. Method and IMF dependence
• UVUDF: UV Luminosity Functions at the cosmic high-noon
• Top-heavy integrated galactic stellar initial mass functions (IGIMFs) in starbursts
• The initial mass function of star clusters that form in turbulent molecular clouds
• Halpha3: Halpha imaging survey of HI selected galaxies from ALFALFA
• Simulating radiative feedback and star cluster formation in GMCs: II. Mass dependence of cloud destruction and cluster properties
• Resolved magnetic structures in the disk-halo interface of NGC 628
• Chemical evolution of ultra-faint dwarf galaxies in the self-consistently calculated IGIMF theory
• The chemical evolution of galaxies with a variable IGIMF
• The old environment of the faint calcium-rich supernova SN 2005cz
• Hypervelocity stars from young stellar clusters in the Galactic Centre
• The effect of the environment-dependent IMF on the formation and metallicities of stars over the cosmic history
• More galaxies in the Local Volume imaged in H-alpha
• Star formation in the outskirts of DDO 154: A top-light IMF in a nearly dormant disc
• The galactocentric radius dependent upper mass limit of young star clusters: stochastic star formation ruled out
• Galaxy and Mass Assembly (GAMA): Dust obscuration in galaxies and their recent star formation histories
• Cosmic Vine: A z=3.44 large-scale structure hosting massive quiescent galaxies
• Variations in Integrated Galactic Initial Mass Functions due to Sampling Method and Cluster Mass Function
• The Chemical Signature of a Relic Star Cluster in the Sextans Dwarf Spheroidal Galaxy - Implications for Near-Field Cosmology
• First stellar spectroscopy in Leo P
• The role of spiral arms in Milky Way star formation
• Sampling methods for stellar masses and the mmax-Mecl relation in the starburst dwarf galaxy NGC 4214
• Effects of the integrated galactic IMF on the chemical evolution of the solar neighbourhood
• Morphological properties of galaxies in different Local Volume environments
• Small Bites: Star formation recipes in extreme dwarfs
• The Evolution of Stellar Populations in the Outer Disks of Spiral Galaxies
• On the shape and evolution of a cosmic ray regulated galaxy-wide stellar initial mass function
• The effect of the environment-dependent stellar initial mass function on the photometric properties of star-forming galaxies
• Exploring the impact of IMF and binary parameter stochasticity with a binary population synthesis code
• Auto-consistent metallicity and star formation history of the nearest blue compact dwarf galaxy NGC 6789
• The influence of a top-heavy integrated galactic IMF and dust on the chemical evolution of high-redshift starbursts
• Stochastic stellar cluster IMFs: Models and impact on integrated cluster parameter determination
• A spatially resolved analysis of star-formation burstiness by comparing UV and H$\alpha$ in galaxies at z$\sim$1 with UVCANDELS
• Evolution of galaxy habitability
• Atomic hydrogen, star formation and feedback in the lowest mass Blue Compact Dwarf galaxies
• The most luminous, merger-free AGN show only marginal correlation with bar presence
• Hα to FUV ratios in resolved star forming region populations of nearby spiral galaxies
• The MURALES survey. V. Jet-induced star formation in 3C 277.3 (Coma A)
• BiPoS1 -- a computer programme for the dynamical processing of the initial binary star population
• Metallicity calibrations of low star-forming galaxies: the influence of a stochastic IMF
• H-alpha survey of low-mass satellites of the neighbouring galaxies M31 and M81
• Empirical estimation of host galaxy dispersion measure towards well localized fast radio bursts
• Exploring the Correlation between $\mathrm{H}\alpha$-to-UV Ratio and Burstiness for Typical Star-forming Galaxies at $z\sim 2$
• Galactic Population Synthesis of Radioactive Nucleosynthesis Ejecta
• Simple interpolation functions for the galaxy-wide stellar initial mass function and its effects in early-type galaxies
• Variation of the stellar initial mass function in semi-analytical models III: testing the cosmic ray regulated integrated galaxy-wide initial mass function
• New Halpha flux measurements in nearby dwarf galaxies
• Evidence for Non-smooth Quenching in Massive Galaxies at $z\sim 1$
• Star-Forming Regions in Dwarf Galaxies of the Local Volume
• 12CO and 13CO observation of the low-metallicity dwarf galaxy DDO 154
• Evolutionary models for the Very Massive Stars in the R136 cluster of 30 Doradus in the Large Magellanic Cloud
• Evolutionary synthesis models as a tool and guide towards the first galaxies
• Wide HI profile galaxies
• The influence of star clusters on galactic disks: new insights on star-formation in galaxies
• Environments of massive stars and the upper mass limit
• The mmax-Mecl relation in the LEGUS clusters