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Conference Papers Year : 2021

Encounter of Parker Solar Probe and a Comet-like Object During Their Perihelia: Simulations and Measurements

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1
Jiansen He
Bo Cui
  • Function : Author
Liping Yang
  • Function : Author
Chuanpeng Hou
  • Function : Author
Lei Zhang
  • Function : Author
Wing-Huen Ip
Yingdong Jia
  • Function : Author
Chuanfei Dong
Die Duan
  • Function : Author
Qiugang Zong
  • Function : Author
Marc Pulupa
John Bonnell
Keith Goetz
Peter Harvey
Robert Macdowall
David Malaspina

Abstract

Parker Solar Probe (PSP) aims at exploring the nascent solar wind close to the Sun. Meanwhile, PSP is also expected to encounter small objects like comets and asteroids. In this work, we survey the ephemerides to find a chance of recent encounter, and then model the interaction between released dusty plasmas and solar wind plasmas. On 2019 September 2, a comet-like object 322P/SOHO just passed its perihelion flying to a heliocentric distance of 0.12 au, and swept by PSP at a relative distance as close as 0.025 au. We present the dynamics of dust particles released from 322P, forming a curved dust tail. Along the PSP path in the simulated inner heliosphere, the states of plasma and magnetic field are sampled and illustrated, with the magnetic field sequences from simulation results being compared directly with the in-situ measurements from PSP. Through comparison, we suggest that 322P might be at a deficient activity level releasing limited dusty plasmas during its way to becoming a "rock comet". We also present images of solar wind streamers as recorded by WISPR, showing an indication of dust bombardment for the images superposed with messy trails. We observe from LASCO coronagraph that 322P was transiting from a dimming region to a relatively bright streamer during its perihelion passage, and simulate to confirm that 322P was flying from relatively faster to slower solar wind streams, modifying local plasma states of the streams.

Dates and versions

insu-03559299 , version 1 (06-02-2022)

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Jiansen He, Bo Cui, Liping Yang, Chuanpeng Hou, Lei Zhang, et al.. Encounter of Parker Solar Probe and a Comet-like Object During Their Perihelia: Simulations and Measurements. vEGU21, 0000, à renseigner, Unknown Region. ⟨10.5194/egusphere-egu21-14686⟩. ⟨insu-03559299⟩

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