A new method for classifying galaxy SEDs from multi-wavelength photometry

Abstract

We present a new method to classify the broad band optical-NIR spectral energy distributions (SEDs) of galaxies using three shape parameters (super-colours) based on a Principal Component Analysis of model SEDs. As well as providing a compact representation of the wide variety of SED shapes, the method allows for easy visualisation of information loss and biases caused by the incomplete sampling of the rest-frame SED as a function of redshift. We apply the method to galaxies in the UKIDSS Ultra Deep Survey with 0.9<z<1.2, and confirm our classifications by stacking rest-frame optical spectra for a fraction of objects in each class. As well as cleanly separating a tight red-sequence from star-forming galaxies, three unusual populations are identifiable by their unique colours: very dusty star-forming galaxies with high metallicity and old mean stellar age; post-starburst galaxies which have formed greater than around 10% of their mass in a recent unsustained starburst event; and metal-poor quiescent dwarf galaxies. We find that quiescent galaxies account for 45% of galaxies with log(M*/Msol)>11, declining steadily to 13% at log(M*/Msol)=10. The properties and mass-function of the post-starburst galaxies are consistent with a scenario in which gas-rich mergers contribute to the growth of the low and intermediate mass range of the red sequence.

arXiv comment19 pages, 17 figures, MNRAS accepted. A version with high resolution figures can be downloaded from http://www-star.st-and.ac.uk/~vw8/udsz_supercolour_hires.pdf

References in corpus (64)

• Stellar population synthesis at the resolution of 2003
• The Sloan Digital Sky Survey: Technical Summary
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Stellar Masses and Star Formation Histories for 10^5 Galaxies from the Sloan Digital Sky Survey
• The Host Galaxies and Classification of Active Galactic Nuclei
• Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxies
• A Simple Model for the Absorption of Starlight by Dust in Galaxies
• UV Star Formation Rates in the Local Universe
• A simple model to interpret the ultraviolet, optical and infrared emission from galaxies
• The ages and metallicities of galaxies in the local universe
• Mass assembly in quiescent and star-forming galaxies since z=4 from UltraVISTA
• Analysis of galaxy SEDs from far-UV to far-IR with CIGALE: Studying a SINGS test sample
• Modeling the Panchromatic Spectral Energy Distributions of Galaxies
• Detection of quiescent galaxies in a bicolor sequence from z=0-2
• Present-Day Growth of Black Holes and Bulges: the SDSS Perspective
• The UKIRT Infrared Deep Sky Survey ZYJHK Photometric System: Passbands and Synthetic Colours
• PRIMUS: Constraints on Star Formation Quenching and Galaxy Merging, and the Evolution of the Stellar Mass Function From z=0-1
• The NEWFIRM Medium-band Survey: Photometric Catalogs, Redshifts and the Bimodal Color Distribution of Galaxies out to z~3
• The WFCAM Science Archive
• The UKIRT Wide Field Camera ZYJHK Photometric System: Calibration from 2MASS
• The Mauna Kea Observatories Near-Infrared Filter Set. II. Specifications for a New JHKL'M' Filter Set for Infrared Astronomy
• An Ultraviolet-to-Radio Broadband Spectral Atlas of Nearby Galaxies
• What do we learn from IRAC observations of galaxies at 2 < z < 3.5?
• Fitting the integrated Spectral Energy Distributions of Galaxies
• The Subaru/XMM-Newton Deep Survey (SXDS) - II. Optical Imaging and Photometric Catalogs
• On the Origin of [OII] Emission in Red Sequence and Post-starburst Galaxies
• The impact of nebular emission on the ages of z~6 galaxies
• Massive Lossless Data Compression and Multiple Parameter Estimation from Galaxy Spectra
• The Rest-Frame Optical Luminosity Density, Color, and Stellar Mass Density of the Universe from z=0 to z=3
• Spectral Classification of Quasars in the Sloan Digital Sky Survey: Eigenspectra; Redshift and Luminosity Effects
• Recovering galaxy star formation and metallicity histories from spectra using VESPA
• Very blue UV-continuum slopes of low luminosity z~7 galaxies from WFC3/IR: Evidence for extremely low metallicities?
• Timing the starburst-AGN connection
• A Large Population of Massive Compact Post-Starburst Galaxies at z>1: Implications for the Size Evolution and Quenching Mechanism of Quiescent Galaxies
• Empirical determination of the shape of dust attenuation curves in star-forming galaxies
• Spectral Classification of Galaxies: An Orthogonal Approach
• The sizes, masses and specific star-formation rates of massive galaxies at 1.3<z<1.5: strong evidence in favour of evolution via minor mergers
• Post-starburst galaxies: more than just an interesting curiosity
• The evolution of the near-IR galaxy Luminosity Function and colour bimodality up to z ~ 2 from the UKIDSS Ultra Deep Survey Early Data Release
• Bursty stellar populations and obscured AGN in galaxy bulges
• The Subaru/XMM-Newton Deep Survey (SXDS): III. X-Ray Data
• Panchromatic spectral energy distributions of Herschel sources
• A critical analysis of the UV-continuum slopes of high-redshift galaxies; no evidence (yet) for extreme stellar populations at z > 6
• High velocity outflows from young star-forming galaxies in the UKIDSS Ultra-Deep Survey
• The Spectral Energy Distribution of Post-Starburst Galaxies in the NEWFIRM Medium-Band Survey: A Low Contribution from TP-AGB Stars
• A new measurement of the evolving near-infrared galaxy luminosity function out to z~4: a continuing challenge to theoretical models of galaxy formation
• Spectral Decomposition of Broad-Line AGNs and Host Galaxies
• Relative merits of different types of rest-frame optical observations to constrain galaxy physical parameters
• A remarkably high fraction of strong Ly_alpha emitters amongst luminous redshift 6.0<z<6.5 Lyman break galaxies in the UKIDSS Ultra-Deep Survey
• Radio imaging of the Subaru/XMM-Newton Deep Field - III. Evolution of the radio luminosity function beyond z=1
• Near Infrared spectroscopy of post-starburst galaxies: a limited impact of TP-AGB stars on galaxy SEDs
• Automatic Redshift Determination by use of Principal Component Analysis --- I: Fundamentals
• A Robust Classification of Galaxy Spectra: Dealing with Noisy and Incomplete Data
• SED fitting with Markov Chain Monte Carlo: Methodology and Application to z=3.1 Lyman Alpha Emitting Galaxies
• The Contribution of TP-AGB and RHeB Stars to the Near-IR Luminosity of Local Galaxies: Implications for Stellar Mass Measurements of High Redshift Galaxies
• Discovery of bright z ~ 7 galaxies in the UltraVISTA survey
• Ensemble Learning Independent Component Analysis of Normal Galaxy Spectra
• Galaxy Zoo: building the low-mass end of the red sequence with local post-starburst galaxies
• Galaxy spectral parameterisation in the 2dF Galaxy Redshift Survey as a diagnostic of star formation history
• The colour selection of distant galaxies in the UKIDSS Ultra-Deep Survey Early Data Release
• A Spectral Atlas of HII Galaxies in the Near-Infrared
• Classification and analysis of emission-line galaxies using mean field independent component analysis
• Fast Algorithms and Efficient Statistics: Density Estimation in Large Astronomical Datasets

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