TY  - JOUR
VL  - 277
IS  - 1
N1  - Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
UR  - https://doi.org/10.3847/1538-4365/ada4a7
SN  - 0067-0049
JF  - The Astrophysical Journal: Supplement Series
A1  - Trotta, Domenico
A1  - Dimmock, Andrew
A1  - Hietala, Heli
A1  - Blanco-Cano, Xochitl
A1  - Horbury, Timothy S
A1  - Vainio, Rami
A1  - Dresing, Nina
A1  - Jebaraj, Immanuel Christopher
A1  - Lara, Francisco Espinosa
A1  - Gomez-Herrero, Raul
A1  - Rodriguez-Pacheco, Javier
A1  - Kartavykh, Yulia
A1  - Lario, David
A1  - Gieseler, Jan
A1  - Janvier, Miho
A1  - Maksimovic, Milan
A1  - Sheshvan, Nasrin Talebpour
A1  - Owen, Christopher J
A1  - Kilpua, Emilia KJ
A1  - Wimmer-Schweingruber, Robert F
TI  - An Overview of Solar Orbiter Observations of Interplanetary Shocks in Solar Cycle 25
AV  - public
Y1  - 2025/03/01/
EP  - 17
N2  - Interplanetary (IP) shocks are fundamental constituents of the heliosphere, where they form as a result of solar activity. We use previously unavailable measurements of IP shocks in the inner heliosphere provided by Solar Orbiter, and present a survey of the first 100 shocks observed in situ at different heliocentric distances during the rising phase of solar cycle 25. The fundamental shock parameters (shock normals, shock normal angles, shock speeds, compression ratios, Mach numbers) have been estimated and studied as a function of heliocentric distance, revealing a rich scenario of configurations. Comparison with large surveys of shocks at 1 au shows that shocks in the quasi-parallel regime and with high speed are more commonly observed in the inner heliosphere. The wave environment of the shocks has also been addressed, with about 50% of the events exhibiting clear shock-induced upstream fluctuations. We characterize energetic particle responses to the passage of IP shocks at different energies, often revealing complex features arising from the interaction between IP shocks and preexisting fluctuations, including solar wind structures being processed upon shock crossing. Finally, we give details and guidance on the access use of the present survey, available on the EU-project ?Solar Energetic Particle Analysis Platform for the Inner Heliosphere? website. The algorithm used to identify shocks in large data sets, now publicly available, is also described.
ID  - discovery10205888
PB  - IOP Publishing Ltd
KW  - Science & Technology
KW  -  Physical Sciences
KW  -  Astronomy & Astrophysics
KW  -  CORONAL MASS EJECTIONS
KW  -  PLASMA-WAVES UPSTREAM
KW  -  IN-SITU OBSERVATIONS
KW  -  PARTICLE-ACCELERATION
KW  -  BOW SHOCK
KW  -  ULYSSES OBSERVATIONS
KW  -  ENERGETIC PARTICLES
KW  -  INNER HELIOSPHERE
KW  -  WHISTLER WAVES
KW  -  WIND
ER  -