New Tests of Milli-lensing in the Blazar PKS 1413 + 135

Autor: A. L. Peirson, I. Liodakis, A. C. S Readhead, M. L. Lister, E. S. Perlman, M. F. Aller, R. D. Blandford, K. J. B. Grainge, D. A. Green, M. A. Gurwell, M. W. Hodges, T. Hovatta, S. Kiehlmann, A. Lähteenmäki, W. Max-Moerbeck, T. Mcaloone, S. O’Neill, V. Pavlidou, T. J. Pearson, V. Ravi, R. A. Reeves, P. F. Scott, G. B. Taylor, D. J. Titterington, M. Tornikoski, H. K. Vedantham, P. N. Wilkinson, D. T. Williams, J. A. Zensus
Přispěvatelé: Stanford University, University of Turku, California Institute of Technology, Purdue University, Florida Institute of Technology, University of Michigan, Ann Arbor, University of Manchester, University of Cambridge, Harvard University, Metsähovi Radio Observatory, Foundation for Research and Technology - Hellas, Universidad de Chile, University of Crete, Universidad de Concepción, University of New Mexico, Netherlands Institute for Radio Astronomy, Max Planck Institute for Radio Astronomy, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Peirson, AL [0000-0001-6292-1911], Readhead, ACS [0000-0001-9152-961X], Lister, ML [0000-0003-1315-3412], Perlman, ES [0000-0002-3099-1664], Aller, MF [0000-0003-2483-2103], Blandford, RD [0000-0002-1854-5506], Grainge, KJB [0000-0002-6780-1406], Green, DA [0000-0003-3189-9998], Gurwell, MA [0000-0003-0685-3621], Hovatta, T [0000-0002-2024-8199], Kiehlmann, S [0000-0001-6314-9177], Lähteenmäki, A [0000-0002-0393-0647], Max-Moerbeck, W [0000-0002-5491-5244], McAloone, T [0000-0002-2041-9920], Pearson, TJ [0000-0001-5213-6231], Ravi, V [0000-0002-7252-5485], Scott, PF [0000-0002-0242-7599], Taylor, GB [0000-0001-6495-7731], Titterington, DJ [0000-0003-1431-920X], Tornikoski, M [0000-0003-1249-6026], Vedantham, HK [0000-0002-0872-181X], Zensus, JA [0000-0001-7470-3321], Apollo - University of Cambridge Repository
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Peirson, A L, Liodakis, I, Readhead, A C S, Lister, M L, Perlman, E S, Aller, M F, Blandford, R D, Grainge, K J B, Green, D A, Gurwell, M A, Hodges, M W, Hovatta, T, Kiehlmann, S, Lähteenmäki, A, Max-Moerbeck, W, Mcaloone, T, O’Neill, S, Pavlidou, V, Pearson, T J, Ravi, V, Reeves, R A, Scott, P F, Taylor, G B, Titterington, D J, Tornikoski, M, Vedantham, H K, Wilkinson, P N, Williams, D T & Zensus, J A 2022, ' New Tests of Milli-lensing in the Blazar PKS 1413 + 135 ', The Astrophysical Journal, vol. 927, no. 1, 24 . https://doi.org/10.3847/1538-4357/ac469e
Popis: Symmetric Achromatic Variability (SAV) is a rare form of radio variability in blazars that has been attributed to gravitational millilensing by a ~$10^2 - 10^5$ $M_\odot$ mass condensate. Four SAVs have been identified between 1980 and 2020 in the long-term radio monitoring data of the blazar PKS 1413+135. We show that all four can be fitted with the same, unchanging, gravitational lens model. If SAV is due to gravitational millilensing, PKS 1413+135 provides a unique system for studying active galactic nuclei with unprecedented microarcsecond resolution, as well as for studying the nature of the millilens itself. We discuss two possible candidates for the putative millilens: a giant molecular cloud hosted in the intervening edge-on spiral galaxy, and an undetected dwarf galaxy with a massive black hole. We find a significant dependence of SAV crossing time on frequency, which could indicate a fast shock moving in a slower underlying flow. We also find tentative evidence for a 989-day periodicity in the SAVs, which, if real, makes possible the prediction of future SAVs: the next three windows for possible SAVs begin in August 2022, May 2025, and February 2028.
Accepted to ApJ
Databáze: OpenAIRE
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