@article{7197b0efc6914b3a8ac522640e5f9d95,
title = "Fine-Scale Structure in Cometary Dust Tails I:: Analysis of Striae in Comet C/2006 P1 (McNaught) through Temporal Mapping",
abstract = "Striated features, or striae, form in cometary dust tails due to an as-yet unconstrained process or processes. For the first time we directly display the formation of striae, at C/2006 P1 McNaught, using data from the SOHO LASCO C3 coronagraph. The nature of this formation suggests both fragmentation and shadowing effects are important in the formation process. Using the SOHO data with STEREO-A and B data from the HI-1 and HI-2 instruments, we display the evolution of these striae for two weeks, with a temporal resolution of two hours or better. This includes a period of morphological change on 2007 January 13-14 that we attribute to Lorentz forces caused by the comet{\textquoteright}s dust tail crossing the heliospheric current sheet. The nature of this interaction also implies a mixing of different sized dust along the striae, implying that fragmentation must be continuous or cascading. To enable this analysis, we have developed a new technique – temporal mapping – that displays cometary dust tails directly in the radiation beta (ratio of radiation pressure to gravity) and dust ejection time phase space. This allows for the combination of various data sets and the removal of transient motion and scaling effects",
keywords = "comets - dust, comets - plasma, solar wind, Comets, Plasma, Dust, Solar wind",
author = "Oliver Price and Jones, \{Geraint H.\} and Jeff Morrill and Owens, \{Mathew James\} and Karl Battams and Huw Morgan and Miloslav Druckm{\"u}ller and Sebastian Deiries",
note = "Funding Information: OP is supported by a UK Science and Technology Facilities Council (STFC) PhD studentship. GHJ is grateful to STFC for partial support through consolidated grants ST/K000977/1 and ST/N000722/1. KB is supported by the NASA-Funded Sungrazer Project; grant number NNG12PP90I. Astrometry.net is funded by the US National Science Foundation , the US National Aeronautics and Space Administration NNG12PP90I , and the Canadian National Science and Engineering Research Council. The SOHO/LASCO data used here are produced by a consortium of the Naval Research Laboratory (USA), Max-Planck-Institut f{\"u}r Sonnensystemforschung (Germany), Laboratoire d{\textquoteright}Astronomie (France), and the University of Birmingham (UK), and are available via https://sohowww.nascom.nasa.gov/data/ . SOHO is a project of international cooperation between ESA and NASA. The STEREO/SECCHI data are produced by an international consortium of the NRL (USA), LMSAL (USA), NASA-GSFC (USA), RAL (UK), University of Birmingham (UK), MPS (Germany), CSL (Belgium), IOTA (France), and IAS (France), and are available via https://stereo-ssc.nascom.nasa.gov/ . SOLIS magnetograms are produced cooperatively by NSF/NSO and NASA/LWS. The National Solar Observatory (NSO) is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. This research made use of Astropy, a community-developed core Python package for Astronomy ( Astropy Collaboration, 2013 ). Funding Information: OP is supported by a UK Science and Technology Facilities Council (STFC) PhD studentship. GHJ is grateful to STFC for partial support through consolidated grants ST/K000977/1 and ST/N000722/1. KB is supported by the NASA-Funded Sungrazer Project; grant number NNG12PP90I. Astrometry.net is funded by the US National Science Foundation, the US National Aeronautics and Space Administration NNG12PP90I, and the Canadian National Science and Engineering Research Council. The SOHO/LASCO data used here are produced by a consortium of the Naval Research Laboratory (USA), Max-Planck-Institut f{\"u}r Sonnensystemforschung (Germany), Laboratoire d'Astronomie (France), and the University of Birmingham (UK), and are available via https://sohowww.nascom.nasa.gov/data/. SOHO is a project of international cooperation between ESA and NASA. The STEREO/SECCHI data are produced by an international consortium of the NRL (USA), LMSAL (USA), NASA-GSFC (USA), RAL (UK), University of Birmingham (UK), MPS (Germany), CSL (Belgium), IOTA (France), and IAS (France), and are available via https://stereo-ssc.nascom.nasa.gov/. SOLIS magnetograms are produced cooperatively by NSF/NSO and NASA/LWS. The National Solar Observatory (NSO) is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration, 2013). Publisher Copyright: {\textcopyright} 2018",
year = "2019",
month = feb,
day = "1",
doi = "10.1016/j.icarus.2018.09.013",
language = "English",
volume = "319",
pages = "540--557",
journal = "Icarus",
issn = "0019-1035",
publisher = "Elsevier",
}