2018/05/09 by C. López-Sanjuán, C. López-Sanjuan, L. A. Díaz-García +22
Environmental Science · Physics and Astronomy · #Astronomy #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Impact of Light on Environment and Health #Mass ratio #Physics #Redshift #Rest frame #Star formation #Stellar mass #Stellar, planetary, and galactic studies #Velocity dispersion #astro-ph.GA
paper · pdf · doi:10.1051/0004-6361/201833402
published as A&A 622, A51 (2019) · Submitted to Astronomy and Astrophysics. 9 pages, 6 figures, 1 table. Comments are welcome
arxiv created 2018/05/09 · openalex created_date 2018/05/17 · openalex publication_date 2018/12/06 · arxiv updated 2019/01/30 · openalex updated_date 2026/08/05
Aims. Our goal is to characterise the dependence of the optical mass-to-light ratio on galaxy colour up to z = 1.5, expanding the redshift range explored in previous work. Methods. From the redshifts, stellar masses, and rest-frame luminosities of the ALHAMBRA multi-filter survey, we derive the mass-to-light ratio versus colour relation for quiescent and for star-forming galaxies. The intrinsic relation and its physical dispersion are derived with a Bayesian inference model. Results. The rest-frame i -band mass-to-light ratio of quiescent and star-forming galaxies presents a tight correlation with the rest-frame ( g − i ) colour up to z = 1.5. The mass-to-light ratio versus colour relation is linear for quiescent galaxies and quadratic for star-forming galaxies. The intrinsic dispersion in these relations is 0.02 dex for quiescent galaxies and 0.06 dex for star-forming ones. The derived relations do not present a significant redshift evolution and are compatible with previous local results in the literature. Finally, these tight relations also hold for g - and r -band luminosities. Conclusions. The derived mass-to-light ratio versus colour relations in ALHAMBRA can be used to predict the mass-to-light ratio from a rest-frame optical colour up to z = 1.5. These tight correlations do not change with redshift, suggesting that galaxies have evolved along the derived relations during the last 9 Gyr.