Year: 2019
Type: article
Abstract: We present new measurements of the time delays of WFI2033−4723. The data sets used in this work include 14 years of data taken at the 1.2 m Leonhard Euler Swiss telescope, 13 years of data from the SMARTS 1.3 m telescope at Las Campanas Observatory and a single year of high-cadence and high-precision monitoring at the MPIA 2.2 m telescope. The time delays measured from these different data sets, all taken in the R-band, are in good agreement with each other and with previous measurements from the literature. Combining all the time-delay estimates from our data sets results in ΔtAB = 36.2+0.7−0.8 days (2.1% precision), ΔtAC = −23.3+1.2−1.4 days (5.6%) and ΔtBC = −59.4+1.3−1.3 days (2.2%). In addition, the close image pair A1-A2 of the lensed quasars can be resolved in the MPIA 2.2 m data. We measure a time delay consistent with zero in this pair of images. We also explore the prior distributions of microlensing time-delay potentially affecting the cosmological time-delay measurements of WFI2033−4723. Our time-delay measurements are not precise enough to conclude that microlensing time delay is present or absent from the data. This work is part of a H0LiCOW series focusing on measuring the Hubble constant from WFI2033−4723.
Source: Astronomy and Astrophysics
Authors: V. Bonvin, M. Millon, J. H.-H. Chan, F. Courbin, C. E. Rusu, D. Sluse, S. H. Suyu, K. C. Wong, C. D. Fassnacht, P. J. Marshall, T. Treu, E. Buckley-Geer, J. Frieman, A. Hempel, S. Kim, R. Lachaume, M. Rabus, D. C.-Y. Chao, M. Chijani, D. Gilman, K. Gilmore, K. Rojas, P. Williams, T. Anguita, C. S. Kochanek, C. Morgan, V. Motta, M. Tewes, G. Meylan
Institutions: École Polytechnique Fédérale de Lausanne, National Astronomical Observatory of Japan, University of California, Davis, University of Liège, Institute of Astronomy and Astrophysics, Academia Sinica, Max Planck Institute for Astrophysics, Technical University of Munich, Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Fermi National Accelerator Laboratory, University of Chicago, Universidad Andrés Bello, Max Planck Institute for Astronomy, Pontificia Universidad Católica de Chile, Las Cumbres Observatory Global Telescope Network, University of California, Santa Barbara, Millennium Institute of Astrophysics, The Ohio State University, United States Naval Academy, University of Valparaíso, University of Bonn
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, David and Lucile Packard Foundation, U.S. Department of Energy, Harvard University, Strong, European Commission, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Academia Sinica, Chinese Academy of Sciences, Belgian Federal Science Policy Office, Korea Astronomy and Space Science Institute, Max-Planck-Gesellschaft, National Astronomical Observatory of Japan, Max-Planck-Institut für Astronomie, East Asian Core Observatories Association, Radcliffe Institute for Advanced Study, Harvard University
Awards: G2371548206, Towards a better understanding of paleoenvironmental changes during a poorly known time interval: A multiproxy analysis of the Aalenian (Middle Jurassic), G303061748, A Correlation Between Quasar X-Ray Continuum Emission Region Size and Black Hole Mass, G434337789, G453144764, A Search for Failed Supernovae and Other Observational Constraints on the Supernova Mechanism, Collaborative Research: Investigating the nature of dark matter with gravitational lensing, G5570207115, Collaborative Research: Accurate cosmology with strong gravitational lens time delays, All-Sky Automated Survey for Supernovae: Big Science with Small Telescopes, G8945569637, G950254766, G969889393
OpenAlex ID: W2953603112