Spectral Synthesis via Mean Field approach Independent Component Analysis
arXiv:1509.03928 · doi:10.1088/1674-4527/16/3/042
Abstract
In this paper, we apply a new statistical analysis technique, Mean Field approach to Bayesian Independent Component Analysis (MF-ICA), on galaxy spectral analysis. This algorithm can compress the stellar spectral library into a few Independent Components (ICs), and galaxy spectrum can be reconstructed by these ICs. Comparing to other algorithms which decompose a galaxy spectrum into a combination of several simple stellar populations, MF-ICA approach offers a large improvement in the efficiency. To check the reliability of this spectral analysis method, three different methods are used: (1) parameter-recover for simulated galaxies, (2) comparison with parameters estimated by other methods, and (3) consistency test of parameters from the Sloan Digital Sky Survey galaxies. We find that our MF-ICA method not only can fit the observed galaxy spectra efficiently, but also can recover the physical parameters of galaxies accurately. We also apply our spectral analysis method to the DEEP2 spectroscopic data, and find it can provide excellent fitting for those low signal-to-noise spectra.
arXiv commentAccepted to RAA, 18 pages, 9 figures
References in corpus (33)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Stellar population synthesis at the resolution of 2003
- The Sloan Digital Sky Survey: Technical Summary
- The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
- Star Formation in the Milky Way and Nearby Galaxies
- Theoretical Modeling of Starburst Galaxies
- Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
- Stellar Masses and Star Formation Histories for 10^5 Galaxies from the Sloan Digital Sky Survey
- The 2dF Galaxy Redshift Survey: Spectra and redshifts
- SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
- 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
- The Eighth Data Release of the Sloan Digital Sky Survey: First Data from SDSS-III
- Differential Galaxy Evolution in Cluster and Field Galaxies at z=0.3
- Modeling the Panchromatic Spectral Energy Distributions of Galaxies
- The First Data Release (DR1) of the LAMOST general survey
- PARSEC evolutionary tracks of massive stars up to at metallicities 0.00010.04
- The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
- Evolution of asymptotic giant branch stars I. Updated synthetic TP-AGB models and their basic calibration
- Stellar Content from high resolution galactic spectra via Maximum A Posteriori
- Recovering galaxy star formation and metallicity histories from spectra using VESPA
- Distributions of Galaxy Spectral Types in the Sloan Digital Sky Survey
- The DEEP3 Galaxy Redshift Survey: Keck/DEIMOS Spectroscopy in the GOODS-N Field
- Ensemble Learning Independent Component Analysis of Normal Galaxy Spectra
- A probabilistic formulation for Empirical Population Synthesis: Sampling methods and tests
- Spectroscopic study of blue compact galaxies III. Empirical population synthesis
- Classification and analysis of emission-line galaxies using mean field independent component analysis
- CMB signal in WMAP 3yr data with FastICA
- Accurate parameter estimation for star formation history in galaxies using SDSS spectra
- A data-driven Bayesian approach for finding young stellar populations in early-type galaxies from their UV-optical spectra
- Principal component analysis for spectral indices of stellar populations
- Kinematics and Stellar Population Properties of the Andromeda Galaxy by the Spectroscopic Observations of the Guoshoujing Telescope
- Morphology and structure of BzK-selected galaxies at z~2 in the CANDELS-COSMOS field