On the multiwavelength variability of Mrk 110: two components acting at different time-scales

Author:

Vincentelli F M1ORCID,McHardy I1,Cackett E M2,Barth A J3ORCID,Horne K4,Goad M5,Korista K6,Gelbord J7,Brandt W8910,Edelson R11,Miller J A2,Pahari M12ORCID,Peterson B M1213,Schmidt T14,Baldi R D115ORCID,Breedt E16ORCID,Hernández Santisteban J V4,Romero-Colmenero E1718,Ward M19,Williams D R A20

Affiliation:

1. Department of Physics and Astronomy, University of Southampton, SO17 1BJ, UK

2. Department of Physics & Astronomy, Wayne State University, 666 W Hancock St, Detroit, MI 48201, USA

3. Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, CA 92697-4575, USA

4. SUPA Physics and Astronomy, University of St Andrews, North Haugh KY16 9SS, UK

5. School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK

6. Department of Physics, Western Michigan University, 1120 Everett Tower, Kalamazoo, MI 49008-5252, USA

7. Spectral Sciences Inc., 4 Fourth Avenue, Burlington, MA 01803, USA

8. Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA

9. Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA

10. Department of Physics, 104 Davey Lab, The Pennsylvania State University, University Park, PA 16802, USA

11. Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USA

12. Department of Physics, Indian Institute of Technology, Hyderabad 502285, India

13. Center for Cosmology and AstroParticle Physics, The Ohio State University, 192 West Woodruff Ave., Columbus, OH 43210, USA

14. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547, USA

15. INAF – Istituto di Radioastronomia, Via P. Gobetti 101, I-40129 Bologna, Italy

16. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK

17. South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa

18. Southern African Large Telescope Foundation, PO Box 9, Observatory 7935, Cape Town, South Africa

19. Centre for Extragalactic Astronomy, Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK

20. Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK

Abstract

ABSTRACT We present the first intensive continuum reverberation mapping study of the high accretion-rate Seyfert galaxy Mrk 110. The source was monitored almost daily for more than 200 d with the Swift X-ray and ultraviolet (UV)/optical telescopes, supported by ground-based observations from Las Cumbres Observatory, the Liverpool Telescope, and the Zowada Observatory, thus extending the wavelength coverage to 9100 Å. Mrk 110 was found to be significantly variable at all wavebands. Analysis of the intraband lags reveals two different behaviours, depending on the time-scale. On time-scales shorter than 10 d the lags, relative to the shortest UV waveband (∼1928 Å), increase with increasing wavelength up to a maximum of ∼2 d lag for the longest waveband (∼9100 Å), consistent with the expectation from disc reverberation. On longer time-scales, however, the g-band lags the Swift BAT hard X-rays by ∼10 d, with the z-band lagging the g-band by a similar amount, which cannot be explained in terms of simple reprocessing from the accretion disc. We interpret this result as an interplay between the emission from the accretion disc and diffuse continuum radiation from the broad-line region.

Funder

STFC

NSF

NASA

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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