Star formation at z$\sim$0.9 from the OTELO survey: A comprehensive view combining deep optical spectroscopy and infrared data

Abstract

We aim to quantify the star formation rate (SFR) from deep optical spectroscopic data and far-infrared (FIR) photometry from a sample of galaxies at $z\sim 0.9$ from the OTELO survey and compare the activity estimated by optical tracers and FIR emission. We used the multi-wavelength OTELO catalogue to construct a sample of FIR sources. We identified and separated galaxies with active nuclei and derived the physical properties of the rest. We analysed their spectral energy distribution, obtaining estimates for stellar mass, dust attenuation, luminosity, and SFR based on infrared luminosity. We also studied H$\beta$ and [OIII] emission-line galaxies without significant FIR emission from previous works. This approach allowed us to perform a comparative analysis among the SFR obtained through different calibrators, in particular H$\beta$, presented in a previous work. We find that FIR-based SFR estimates uncover a significant fraction of hidden star formation. We determined that the SFR density obtained from the FIR emission is three times larger than that obtained from only emission-line sources. Likely related to the fact that each SFR tracer provides insight into star formation over different timescales, we suggest that such indicators are also more or less suited for different galaxy populations. Specifically, while optical emission lines effectively trace star formation in lower-mass galaxies, FIR-derived SFRs provide a more reliable measure in massive dust-rich systems. By accounting for both optically visible and obscured star formation, we provide a more comprehensive view of the star-forming main sequence at $z\sim 0.9$ and reinforce the importance of infrared tracers in studying galaxy evolution.

arXiv comment15 pages, 13 figures

References in corpus (60)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• On the variation of the Initial Mass Function
• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Cosmic Star Formation History
• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• Star Formation in the Milky Way and Nearby Galaxies
• The Herschel-SPIRE instrument and its in-flight performance
• Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
• 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
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• Accurate photometric redshifts for the CFHT Legacy Survey calibrated using the VIMOS VLT Deep Survey
• The reversal of the star formation-density relation in the distant universe
• CIGALE: a python Code Investigating GALaxy Emission
• GOODS-Herschel: an infrared main sequence for star-forming galaxies
• Measuring and Modelling the Redshift Evolution of Clustering: the Hubble Deep Field North
• The Mid-Infrared Spectrum of Star-Forming Galaxies: Global Properties of PAH Emission
• Analysis of galaxy SEDs from far-UV to far-IR with CIGALE: Studying a SINGS test sample
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• The lesser role of starbursts for star formation at z=2
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• The Herschel Multi-tiered Extragalactic Survey: HerMES
• An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
• The DEEP2 Galaxy Redshift Survey: Design, Observations, Data Reduction, and Redshifts
• Identifying Luminous AGN in Deep Surveys: Revised IRAC Selection Criteria
• Dust-Corrected Star Formation Rates of Galaxies. I. Combinations of H-alpha and Infrared Tracers
• Revisiting the Infrared Spectra of Active Galactic Nuclei with a New Torus Emission Model
• Star Formation and Dust Attenuation Properties in Galaxies from a Statistical UV-to-FIR Analysis
• CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
• PACS Evolutionary Probe (PEP) - A Herschel Key Program
• An Objective Definition for the Main Sequence of Star-Forming Galaxies
• Fitting the integrated Spectral Energy Distributions of Galaxies
• The Main Sequence of star-forming galaxies across cosmic times
• Rest-frame ultraviolet-to-optical spectral characteristics of extremely metal-poor and metal-free galaxies
• Cosmic Variance in the Great Observatories Origins Deep Survey
• Constraining the properties of AGN host galaxies with Spectral Energy Distribution modeling
• The H-alpha and Infrared Star Formation Rates for the Nearby Field Galaxy Survey
• The Carnegie Supernova Project I: analysis of stripped-envelope supernova light curves
• Finding counterparts for All-sky X-ray surveys with Nway: a Bayesian algorithm for cross-matching multiple catalogues
• The WIRCam Deep Survey I: Counts, colours and mass-functions derived from near-infrared imaging in the CFHTLS deep fields
• The Evolution of the IR Luminosity Function and Dust-obscured Star Formation in the Last 13 Billion Years
• The Art of Measuring Physical Parameters in Galaxies: A Critical Assessment of Spectral Energy Distribution Fitting Techniques
• Star formation rate in galaxies from UV, IR, and H-alpha estimators
• Vindicating single-T modified blackbody fits to Herschel SEDs (Research Note)
• UV-to-FIR analysis of Spitzer/IRAC sources in the Extended Groth Strip II: Photometric redshifts, Stellar masses and Star formation rates
• Unveiling the Nature of Infrared Bright, Optically Dark Galaxies with Early JWST Data
• Impact of star formation history on the measurement of star formation rates
• A multivariate statistical analysis of spiral galaxy luminosities. I. Data and results
• Dust attenuation and Halpha emission in a sample of galaxies observed with Herschel at $0.6<z<1.6$
• A planetary system with gas giants and super-Earths around the nearby M dwarf GJ 676A. Optimizing data analysis techniques for the detection of multi-planetary systems
• The OTELO survey. I. Description, data reduction, and multi-wavelength catalogue
• The ALHAMBRA survey: tight dependence of the optical mass-to-light ratio on galaxy colour up to z = 1.5
• Modeling the ionizing spectra of H ii regions: individual stars versus stellar ensembles
• The OTELO survey: Nature and mass-metallicity relation for H$\alpha$ emitters at $z\sim 0.4$
• The OTELO survey. III. Demography, morphology, IR luminosity and environment of AGN hosts
• On recent SFR calibrations and the constant SFR approximation
• Going deeper into the dark with COSMOS-Web: JWST unveils the total contribution of Radio-Selected NIRfaint galaxies to the cosmic Star Formation Rate Density
• The OTELO survey: the star formation rate evolution of low-mass galaxies
• The OTELO survey: Revealing a population of low-luminosity current/active star-forming galaxies at z$\sim 0.9$