Less is less: photometry alone cannot predict the observed spectral indices of z∼1 galaxies from the LEGA-C spectroscopic survey

2023/10/27 by Angelos Nersesian, Nersesian, Angelos, Arjen van der Wel +21
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena

paper · pdf · doi:10.48550/arxiv.2310.18000

openalex publication_date 2023/10/27 · openalex created_date 2023/11/01 · openalex updated_date 2026/07/28

Abstract

We test whether we can predict optical spectra from deep-field photometry of distant galaxies. Our goal is to perform a comparison in data space, highlighting the differences between predicted and observed spectra. The Large Early Galaxy Astrophysics Census (LEGA-C) provides high-quality optical spectra of thousands of galaxies at redshift 0.6

Related

• Predicting the Spectroscopic Features of Galaxies by Applying Manifold Learning on Their Broad-Band Colors: Proof of Concept and Potential Applications for Euclid, Roman, and Rubin LSST
• Recovering physical properties from narrow-band photometry
• Constraining the [CII] luminosity function from the power spectrum of line-intensity maps at redshift 3.6
• The Parameter Space Occupied by Galaxies: The Optical Window
• Extracting cosmological information from galaxy spectra and observations of high-redshift objects