PRESSURE PULSES AT VOYAGER 2: DRIVERS OF INTERSTELLAR TRANSIENTS?

ABSTRACT Voyager 1 (V1) crossed the heliopause into the local interstellar medium (LISM) in 2012. The LISM is a dynamic region periodically disturbed by solar transients with outward-propagating shocks, cosmic-ray intensity changes and anisotropies, and plasma wave oscillations. Voyager 2 (V2) trail...

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Bibliographic Details
Published in:The Astrophysical journal 2017-01, Vol.834 (2), p.190
Main Authors: Richardson, J. D., Wang, C., Liu, Y. D., Šafránková, J., N me ek, Z., Kurth, W. S.
Format: Article
Language:English
Subjects:
ANISOTROPY
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMIC RADIATION
Cosmic ray intensities
Cosmic ray propagation
Heliopause
HELIOSPHERE
Interstellar medium
INTERSTELLAR SPACE
ISM: kinematics and dynamics
Local interstellar medium
MASS
OSCILLATIONS
PERIODICITY
PLASMA WAVES
Pressure pulses
Solar maximum
SOLAR WIND
SUN
Sun: coronal mass ejections (CMEs)
Sun: heliosphere
TRANSIENTS
VOYAGER SPACE PROBES
Wave propagation
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Summary:ABSTRACT Voyager 1 (V1) crossed the heliopause into the local interstellar medium (LISM) in 2012. The LISM is a dynamic region periodically disturbed by solar transients with outward-propagating shocks, cosmic-ray intensity changes and anisotropies, and plasma wave oscillations. Voyager 2 (V2) trails V1 and thus may observe the solar transients that are later observed at V1. V2 crossed the termination shock in 2007 and is now in the heliosheath. Starting in 2012, when solar maximum conditions reached V2, five possible merged interaction regions (MIRs) have been observed by V2 in the heliosheath. The timing is consistent with these MIRs driving the transients observed by V1 in the LISM. The largest heliosheath MIR was observed by V2 in late 2015 and should reach V1 in 2018.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/834/2/190