Candidate Periodically Variable Quasars from the Dark Energy Survey and the Sloan Digital Sky Survey

  title={Candidate Periodically Variable Quasars from the Dark Energy Survey and the Sloan Digital Sky Survey},
  author={Y. Chen and X. Liu and Wei-ting Liao and A. M. Holgado and H. Guo and R. Gruendl and E. Morganson and Y. Shen and Kaiwen Zhang and T. M. C. Abbott and M. Aguena and S. Allam and S. Avila and E. Bertin and S. Bhargava and D. Brooks and D. Burke and A. C. Rosell and D. Carollo and M. C. Kind and J. Carretero and M. Costanzi and L. Costa and T. Davis and J. Vicente and S. Desai and H. T. Diehl and P. Doel and S. Everett and B. Flaugher and D. Friedel and J. Frieman and J. Garc{\'i}a-Bellido and E. Gazta{\~n}aga and K. Glazebrook and D. Gruen and G. Gutierrez and S. Hinton and D. L. Hollowood and D. James and A. Kim and K. Kuehn and N. Kuropatkin and G. Lewis and C. Lidman and M. Lima and M. Maia and M. March and J. Marshall and F. Menanteau and R. Miquel and A. Palmese and F. Paz-Chinch'on and A. Plazas and E. S'anchez and M. Schubnell and S. Serrano and I. Sevilla-Noarbe and M. Smith and E. Suchyta and M. Swanson and G. Tarl'e and B. Tucker and T. Varga and A. Walker},
  journal={Monthly Notices of the Royal Astronomical Society},
  • Y. Chen, X. Liu, +62 authors A. Walker
  • Published 2020
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • Periodically variable quasars have been suggested as close binary supermassive black holes. We present a systematic search for periodic light curves in 625 spectroscopically confirmed quasars with a median redshift of 1.8 in a 4.6 deg$^2$ overlapping region of the Dark Energy Survey Supernova (DES-SN) fields and the Sloan Digital Sky Survey Stripe 82 (SDSS-S82). Our sample has a unique 20-year long multi-color ($griz$) light curve enabled by combining DES-SN Y6 observations with archival SDSS… CONTINUE READING
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