Flares in the changing look AGN Mrk 590 – I. The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disc

Autor: D Lawther, M Vestergaard, S Raimundo, J Y Koay, B M Peterson, X Fan, D Grupe, S Mathur

Publikováno v: Lawther, D, Vestergaard, M, Raimundo, S, Koay, J Y, Peterson, B M, Fan, X, Grupe, D & Mathur, S 2023, ' Flares in the changing look AGN Mrk 590-I. The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disc ', Monthly Notices of the Royal Astronomical Society, vol. 519, no. 3, pp. 3903-3922 . https://doi.org/10.1093/mnras/stac3515

Mrk 590 is a known changing-look AGN which almost turned off in 2012, and then in 2017 partially re-ignited into a repeat flaring state, unusual for an AGN. Our \emph{Swift} observations since 2013 allow us to characterise the accretion-generated emi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c090fc4daed5c02232813184a5ff5359
https://doi.org/10.1093/mnras/stac3515

MUSE observations of a changing-look AGN I: The re-appearance of the broad emission lines

Autor: Bradley M. Peterson, D. Lawther, S. I. Raimundo, Jun Yi Koay, Marianne Vestergaard, Casasola

Publikováno v: Raimundo, S I, Vestergaard, M, Koay, J Y, Lawther, D, Casasola, V & Peterson, B M 2019, ' MUSE observations of a changing-look AGN I : The re-appearance of the broad emission lines ', Monthly Notices of the Royal Astronomical Society, vol. 486, no. 1, pp. 123-140 . https://doi.org/10.1093/mnras/stz852

Optical changing-look Active Galactic Nuclei (AGN) are a class of sources that change type within a short timescale of years or decades. This change is characterised by the appearance or disappearance of broad emission lines, often associated with dr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9af59a2b0ff678c8205f581cf56df84
http://arxiv.org/abs/1903.08696

A Hubble Space Telescope Imaging Study of Four FeLoBAL Quasar Host Galaxies

Autor: Marianne Vestergaard, D. Lawther, Xiaohui Fan

We study the host galaxies of four Iron Low-Ionization Broad Absorption-line Quasars (FeLoBALs) using Hubble Space Telescope imaging data, investigating the possibility that they represent a transition between an obscured AGN and an ordinary optical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cb3c9cd3da7bf2900b2998f43d198ff
http://arxiv.org/abs/1712.04403

ALMA Probes the Molecular Gas Reservoirs in the Changing-Look Seyfert Galaxy Mrk 590

Autor: D. Lawther, Viviana Casasola, Marianne Vestergaard, Jun Yi Koay, Bradley M. Peterson

We investigate if the active galactic nucleus (AGN) of Mrk 590, whose supermassive black hole was until recently highly accreting, is turning off due to a lack of central gas to fuel it. We analyse new sub-arcsecond resolution ALMA maps of the $^{12}

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14130b08600232f25303551e497d3724
http://arxiv.org/abs/1509.09203

The acquisition of skills and knowledges

Autor: John D. Lawther

Publikováno v: Educational psychology.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac5b33cb7ca5c06fb43f34b0e804631f
https://doi.org/10.1037/13511-003