The ALHAMBRA survey: tight dependence of the optical mass-to-light ratio on galaxy colour up to z = 1.5

DOI: 
10.1051/0004-6361/201833402
Publication date: 
01/02/2019
Main author: 
López-Sanjuan, C.
IAA authors: 
Molino, A.;Benítez, N.;Cerviño, M.;González Delgado, R. M.;Husillos, C.;Márquez, I.;Masegosa, J.;Del Olmo, A.;Pović, M.;Perea, J.
Authors: 
López-Sanjuan, C.;Díaz-García, L. A.;Cenarro, A. J.;Fernández-Soto, A.;Viironen, K.;Molino, A.;Benítez, N.;Cristóbal-Hornillos, D.;Moles, M.;Varela, J.;Arnalte-Mur, P.;Ascaso, B.;Castander, F. J.;Cerviño, M.;González Delgado, R. M.;Husillos, C.;Márquez, I.;Masegosa, J.;Del Olmo, A.;Pović, M.;Perea, J.
Journal: 
Astronomy and Astrophysics
Refereed: 
Yes
Publication type: 
Article
Volume: 
622
Pages: 
A51
Abstract: 
<BR /> 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. <BR /> 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. <BR /> 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. <BR /> 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. Based on observations collected at the German-Spanish Astronomical Centre, Calar Alto, jointly operated by the Max-Planck-Institut für Astronomie (MPIA) at Heidelberg and the Instituto de Astrofísica de Andalucía (CSIC).
Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060870096&doi=10.1051%2f0004-6361%2f201833402&partnerID=40&md5=d0defa04ac8e96af28fab1a63057d98e
ADS Bibcode: 
2019A&A...622A..51L
Keywords: 
galaxies: fundamental parameters;galaxies: statistics;galaxies: stellar content