Nicholas A. Achilleos
Imperial College London
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Nicholas A. Achilleos.
Nature | 2008
Tom Stallard; Steve Miller; Henrik Melin; Makenzie B. Lystrup; S. W. H. Cowley; E. J. Bunce; Nicholas A. Achilleos; Michele K. Dougherty
Planetary aurorae are formed by energetic charged particles streaming along the planet’s magnetic field lines into the upper atmosphere from the surrounding space environment. Earth’s main auroral oval is formed through interactions with the solar wind, whereas that at Jupiter is formed through interactions with plasma from the moon Io inside its magnetic field (although other processes form aurorae at both planets). At Saturn, only the main auroral oval has previously been observed and there remains much debate over its origin. Here we report the discovery of a secondary oval at Saturn that is ∼25 per cent as bright as the main oval, and we show this to be caused by interaction with the middle magnetosphere around the planet. This is a weak equivalent of Jupiter’s main oval, its relative dimness being due to the lack of as large a source of ions as Jupiter’s volcanic moon Io. This result suggests that differences seen in the auroral emissions from Saturn and Jupiter are due to scaling differences in the conditions at each of these two planets, whereas the underlying formation processes are the same.
Science | 2005
Heiko Backes; F. M. Neubauer; Michele K. Dougherty; Nicholas A. Achilleos; N. André; C. S. Arridge; C. Bertucci; Geraint H. Jones; Krishan K. Khurana; C. T. Russell; Alexandre Wennmacher
Icarus | 2002
George Millward; Steve Miller; Tom Stallard; A. D. Aylward; Nicholas A. Achilleos
Icarus | 2007
Tom Stallard; Steve Miller; Henrik Melin; Makenzie B. Lystrup; Michele Dougherty; Nicholas A. Achilleos
Archive | 2006
C. S. Arridge; Nicholas A. Achilleos; Michele K. Dougherty; Krishan K. Khurana; C. T. Russell; D. J. Southwood
Archive | 2007
Nicholas A. Achilleos; C. S. Arridge; H. J. McAndrews; A. Masters; Michele K. Dougherty; Andrew J. Coates
Archive | 2005
Tom Stallard; Suzanne L. Miller; Henrik Melin; Laurence M. Trafton; Michele K. Dougherty; Nicholas A. Achilleos
Archive | 2005
C. Bertucci; Nicholas A. Achilleos; Michele K. Dougherty; C. Mazelle; C. T. Russell; E. Roussos; Tom Krimigis; G. B. Hospodarsky; W. S. Kurth; Abigail Rymer; David T. Young; Bruce T. Tsurutani; E. J. Smith
Magnetospheres of the Outer Planets Conference | 2018
N. Sergis; Nicholas A. Achilleos; P. Guio; C. S. Arridge; A. M. Sorba; E. Roussos; C. Paranicas; S. M. Krimigis; M. K. Dougherty; D. C. Hamilton; N. Krupp; D. G. Mitchell
Archive | 2010
Nicholas A. Achilleos; P. Guio; C. S. Arridge