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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2111.12595.pdf | postprint | 493.14 kB | Adobe PDF | View/Open |
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