Black hole masses for 14 gravitationally lensed quasars

¹ Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching, Germany
² Technical University of Munich, TUM School of Natural Sciences, Department of Physics, James-Franck-Straße 1, 85748 Garching, Germany
³ Instituto de Físisca y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile
e-mail: amelo@mpa-garching.mpg.de
⁴ EPAM Systems, 41 University Drive, Suite 202, Newtown, PA, 18940, USA
⁵ Instituto de Estudios Astrofísicos, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, 8320000, Chile
⁶ Núcleo Milenio de Formación Planetaria (NPF), 2360102 Valparaíso, Chile
⁷ Aix-Marseille Univ., CNRS, CNES, LAM, Marseille, France
⁸ Instituto de Astrofísica de Canarias, Vía Láctea s/n, La Laguna, 38200 Tenerife, Spain
⁹ Departamento de Astrofísica, Universidad de la Laguna, La Laguna, 38200 Tenerife, Spain
¹⁰ Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, 02138, USA
¹¹ Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH, 43210, USA
¹² Center for Cosmology and Astroparticle Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, OH, 43210, USA

Received: 2 June 2023
Accepted: 3 October 2023

Abstract

Aims. We have estimated black hole masses (M_BH) for 14 gravitationally lensed quasars using Balmer lines; we also provide estimates based on MgII and CIV emission lines for four and two of them, respectively. We compared these estimates to results obtained for other lensed quasars.

Methods. We used spectroscopic data from the Large Binocular Telescope (LBT), Magellan, and the Very Large Telescope (VLT) to measure the full width at half maximum of the broad emission lines. Combined with the bolometric luminosity measured from the spectral energy distribution, we estimated M_BH values and provide the uncertainties, including uncertainties from microlensing and variability.

Results. We obtained M_BH values using the single-epoch method from the Hα and/or Hβ broad emission lines for 14 lensed quasars, including the first-ever estimates for QJ0158−4325, HE0512−3329, and WFI2026−4536. The masses are typical of non-lensed quasars of similar luminosities, as are the implied Eddington ratios. We have thus increased the sample of lenses with M_BH estimates by 60%.