Euclid Quick Data Release (Q1). Mass-to-light ratio of elliptical galaxies: constraints from strong lensing

@misc{collaboration2026euclid,
  title = {{Euclid Quick Data Release (Q1). Mass-to-light ratio of elliptical galaxies: constraints from strong lensing}},
  author = {Euclid Collaboration and A. Sonnenfeld and A. Nersesian and K. Rojas and P. Holloway and J. W. Nightingale and C. Tortora and S. Schuldt and T. Li and C. J. Storfer and R. Gavazzi and D. Sluse and G. Despali and T. E. Collett and S. Serjeant and F. Courbin and R. B. Metcalf and S. Vegetti and B. Altieri and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and A. Biviano and M. Bolzonella and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and G. Ca\ nas-Herrera and V. Capobianco and C. Carbone and M. Castellano and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and A. Costille and H. M. Courtois and M. Cropper and H. Degaudenzi and G. De Lucia and C. Dolding and H. Dole and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and F. Faustini},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.00224},
  eprint = {2611.00224},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.00224},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Euclid Quick Data Release (Q1). Mass-to-light ratio of elliptical galaxies: constraints from strong lensing
AU  - Euclid Collaboration
AU  - A. Sonnenfeld
AU  - A. Nersesian
AU  - K. Rojas
AU  - P. Holloway
AU  - J. W. Nightingale
AU  - C. Tortora
AU  - S. Schuldt
AU  - T. Li
AU  - C. J. Storfer
AU  - R. Gavazzi
AU  - D. Sluse
AU  - G. Despali
AU  - T. E. Collett
AU  - S. Serjeant
AU  - F. Courbin
AU  - R. B. Metcalf
AU  - S. Vegetti
AU  - B. Altieri
AU  - S. Andreon
AU  - N. Auricchio
AU  - C. Baccigalupi
AU  - M. Baldi
AU  - A. Balestra
AU  - S. Bardelli
AU  - P. Battaglia
AU  - A. Biviano
AU  - M. Bolzonella
AU  - E. Branchini
AU  - M. Brescia
AU  - J. Brinchmann
AU  - S. Camera
AU  - G. Ca\ nas-Herrera
AU  - V. Capobianco
AU  - C. Carbone
AU  - M. Castellano
AU  - G. Castignani
AU  - S. Cavuoti
AU  - K. C. Chambers
AU  - A. Cimatti
AU  - C. Colodro-Conde
AU  - G. Congedo
AU  - C. J. Conselice
AU  - L. Conversi
AU  - Y. Copin
AU  - A. Costille
AU  - H. M. Courtois
AU  - M. Cropper
AU  - H. Degaudenzi
AU  - G. De Lucia
AU  - C. Dolding
AU  - H. Dole
AU  - F. Dubath
AU  - C. A. J. Duncan
AU  - X. Dupac
AU  - S. Dusini
AU  - S. Escoffier
AU  - M. Farina
AU  - R. Farinelli
AU  - F. Faustini
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.00224
UR  - https://arxiv.org/abs/2611.00224
AB  - Mass is among the most fundamental properties describing a galaxy. The relation between the luminosity and the total mass of a galaxy contains information on the efficiency of the star formation process and on the distribution of dark matter. We used strong gravitational lensing data from the Euclid Quick Data Release 1 (Q1) to constrain the total mass enclosed within an aperture of 5 h^−1kpc, M_5, of elliptical galaxies. Our analysis is based on a sample of 95 lenses, which we built by ensuring that their selection function is reproducible. This enabled us to correct our inference for selection effects. The average log_10(M_5 h M_⊙^−1) for a galaxy with an r-band luminosity of 10^10.7L_⊙ h^−2 at z=0.5 is 11.30±0.02. The mass M_5 scales with luminosity to the power β_L=0.71±0.07, and decreases with increasing redshift at fixed luminosity. Assuming a scenario in which galaxies grow by mergers and stellar populations evolve passively, these correlations imply that M_5 increases with time for individual galaxies. These measurements provide a useful benchmark for testing models of galaxy structure and evolution that make predictions on the distribution of total mass on the scales of 5 h^−1kpc.
ER  -