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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31984
Title: Daily variability at milli-arcsecond scales in the radio quiet NLSy1 Mrk 110
Authors: PANESSA, Francesca 
Miguel Perez-Torres
Lorena Hernandez-Garcia
Piergiorgio Casella
GIROLETTI, MARCELLO 
ORIENTI, Monica 
Ranieri D. Baldi
Loredana Bassani
FIOCCHI, MARIATERESA 
Fabio La Franca
MALIZIA, ANGELA 
Ian McHardy
NICASTRO, FABRIZIO 
PIRO, LUIGI 
Federico Vincentelli
David R. A. Williams
Pietro Ubertini
Issue Date: 2021
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Abstract: The origin of radio emission in the majority of Active Galactic Nuclei (AGN) 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) Mrk110. 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.
URI: http://hdl.handle.net/20.500.12386/31984
URL: http://arxiv.org/abs/2111.12595v2
https://academic.oup.com/mnras/article-abstract/510/1/718/6458365?redirectedFrom=fulltext&login=true
ISSN: 0035-8711
DOI: 10.1093/mnras/stab3426
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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