2019A&A...621A..54S


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET18:56:10

2019A&A...621A..54S - Astronomy and Astrophysics, volume 621A, 54-54 (2019/1-1)

Heliospheric modulation of the interstellar dust flow on to Earth.

STRUB P., STERKEN V.J., SOJA R., KRUGER H., GRUN E. and SRAMA R.

Abstract (from CDS):


Aims. Based on measurements by the Ulysses spacecraft and high-resolution modelling of the motion of interstellar dust (ISD) through the heliosphere we predict the ISD flow in the inner planetary system and on to the Earth. This is the third paper in a series of three about the flow and filtering of the ISD.
Methods. Micrometer- and sub-micrometer-sized dust particles are subject to solar gravity and radiation pressure as well as to interactions with the interplanetary magnetic field that result in a complex size-dependent flow pattern of ISD in the planetary system. With high-resolution dynamical modelling we study the time-resolved flux and mass distribution of ISD and assess the necessary requirements for detection of ISD near the Earth.
Results. Along the Earth orbit the density, speed, and flow direction of ISD depend strongly on the Earth's position and the size of the interstellar grains. A broad maximum of the ISD flux (∼2x10–4m–2s–1 of particles with radii ≥0.3µm) occurs in March when the Earth moves against the ISD flow. During this time period the relative speed with respect to the Earth is highest (∼60km/s), whereas in September when the Earth moves with the ISD flow, both the flux and the speed are lowest (≤10km/s). The mean ISD mass flow on to the Earth is approximately 100kg/yr with the highest flux of ∼3.5kg/day occurring for about 2 weeks close to the end of the year when the Earth passes near the narrow gravitational focus region of the incoming ISD flow, downstream from the Sun. The phase of the 22-year solar wind cycle has a strong effect on the number density and flow of sub-micrometer-sized ISD particles. During the years of maximum electromagnetic focussing (year 2031±3) there is a chance that ISD particles with sizes even below 0.1µm can reach the Earth.
Conclusions. We demonstrate that ISD can be effectively detected, analysed, and even collected by space probes at 1AU distance from the Sun.

Abstract Copyright: © ESO 2019

Journal keyword(s): interplanetary medium - dust, extinction - methods: numerical

Simbad objects: 1

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Number of rows : 1

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME LIC Cld 04 41 +31.           ~ 252 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET18:56:10

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NAME LIC -- Cloud
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Cld ([GLV95])
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  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
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ICRS coord. (ep=J2000) :
04 41 12.0 +31 11 07 [ ] E 2008ApJ...673..283R
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
04 38 00.3 +31 05 22 [ ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
170.0000 -10.0000 [ ]
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NAME LIC NAME Local Cloud NAME Local Interstellar Cloud [GLV95] 1

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References (252 between 1850 and 2021) (Total 252)
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2020.12.03-18:56:10

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