Daily variability at milli-arcsecond scales in the radio-quiet NLSy1 Mrk 110
Daily variability at milli-arcsecond scales in the radio-quiet NLSy1 Mrk 110
The origin of radio emission in the majority of active galactic nuclei is still poorly understood. Various competing mechanisms are likely involved in the production of radio emission and precise diagnostic tools are needed to disentangle them, of which variability is among the most powerful. For the first time, we show evidence for significant radio variability at 5 GHz at milli-arcsecond scales on days to weeks time-scales in the highly accreting and extremely radio-quiet (RQ) Narrow Line Seyfert 1 (NLSy1) Mrk 110. The simultaneous Swift/XRT light curve indicates stronger soft than hard X-ray variability. The short-term radio variability suggests that the GHz emitting region has a size smaller than ∼180 Schwarzschild radii. The high brightness temperature and the radio and X-ray variability rule out a star-formation and a disc wind origin. Synchrotron emission from a low-power jet and/or an outflowing corona is then favoured
718 - 724
Panessa, Francesca
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Pérez-Torres, Miguel
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Hernández-García, Lorena
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Baldi, Ranieri Diego
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McHardy, Ian
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Casella, Piergiorgio
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Giroletti, Marcello
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Orienti, Monica
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Bassani, Loredana
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Teresa Fiocchi, Maria
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La Franca, Fabio
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Malizia, Angela
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Nicastro, Fabrizio
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Piro, Luigi
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Vincentelli, Federico M
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Williams, David R.A.
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Ubertini, Pietro
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9 December 2021
Panessa, Francesca
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Pérez-Torres, Miguel
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Hernández-García, Lorena
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Baldi, Ranieri Diego
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McHardy, Ian
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Casella, Piergiorgio
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Giroletti, Marcello
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Orienti, Monica
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Bassani, Loredana
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Teresa Fiocchi, Maria
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La Franca, Fabio
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Malizia, Angela
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Nicastro, Fabrizio
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Piro, Luigi
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Vincentelli, Federico M
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Williams, David R.A.
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Ubertini, Pietro
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Panessa, Francesca, Pérez-Torres, Miguel, Hernández-García, Lorena, Baldi, Ranieri Diego, McHardy, Ian, Casella, Piergiorgio, Giroletti, Marcello, Orienti, Monica, Bassani, Loredana, Teresa Fiocchi, Maria, La Franca, Fabio, Malizia, Angela, Nicastro, Fabrizio, Piro, Luigi, Vincentelli, Federico M, Williams, David R.A. and Ubertini, Pietro
(2021)
Daily variability at milli-arcsecond scales in the radio-quiet NLSy1 Mrk 110.
Monthly Notices of the Royal Astronomical Society, 510 (1), .
(doi:10.1093/mnras/stab3426).
Abstract
The origin of radio emission in the majority of active galactic nuclei is still poorly understood. Various competing mechanisms are likely involved in the production of radio emission and precise diagnostic tools are needed to disentangle them, of which variability is among the most powerful. For the first time, we show evidence for significant radio variability at 5 GHz at milli-arcsecond scales on days to weeks time-scales in the highly accreting and extremely radio-quiet (RQ) Narrow Line Seyfert 1 (NLSy1) Mrk 110. The simultaneous Swift/XRT light curve indicates stronger soft than hard X-ray variability. The short-term radio variability suggests that the GHz emitting region has a size smaller than ∼180 Schwarzschild radii. The high brightness temperature and the radio and X-ray variability rule out a star-formation and a disc wind origin. Synchrotron emission from a low-power jet and/or an outflowing corona is then favoured
Text
2111.12595
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stab3426
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Accepted/In Press date: 22 November 2021
Published date: 9 December 2021
Additional Information:
arXiv:2111.12595
Identifiers
Local EPrints ID: 454846
URI: http://eprints.soton.ac.uk/id/eprint/454846
ISSN: 1365-2966
PURE UUID: f0cca872-bfee-436e-88d8-8adf8df5cd90
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Date deposited: 25 Feb 2022 17:32
Last modified: 16 Mar 2024 15:54
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Contributors
Author:
Francesca Panessa
Author:
Miguel Pérez-Torres
Author:
Lorena Hernández-García
Author:
Ranieri Diego Baldi
Author:
Ian McHardy
Author:
Piergiorgio Casella
Author:
Marcello Giroletti
Author:
Monica Orienti
Author:
Loredana Bassani
Author:
Maria Teresa Fiocchi
Author:
Fabio La Franca
Author:
Angela Malizia
Author:
Fabrizio Nicastro
Author:
Luigi Piro
Author:
Federico M Vincentelli
Author:
David R.A. Williams
Author:
Pietro Ubertini
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