Daniel Heyner
A5064666575- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Planetary Science and Exploration
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Geology and Paleoclimatology Research
- Space Science and Extraterrestrial Life
- Space Exploration and Technology
- Space Satellite Systems and Control
- Space exploration and regulation
- Stellar, planetary, and galactic studies
- Spacecraft Design and Technology
- Atmospheric Ozone and Climate
- GNSS positioning and interference
- Magnetic and Electromagnetic Effects
- Advanced Thermodynamics and Statistical Mechanics
- Laser-induced spectroscopy and plasma
- Inertial Sensor and Navigation
- Plasma Diagnostics and Applications
- Geophysical and Geoelectrical Methods
- Geophysics and Sensor Technology
- Vehicle Dynamics and Control Systems
- Seismic Waves and Analysis
Technische Universität Braunschweig
2016-2025
Austrian Academy of Sciences
2021-2023
Space Research Institute
2021-2023
Max Planck Institute for Solar System Research
2012
Max Planck Society
2012
Abstract BepiColombo is a joint mission between the European Space Agency, ESA, and Japanese Aerospace Exploration JAXA, to perform comprehensive exploration of Mercury. Launched on $20^{\mathrm{th}}$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mn>20</mml:mn> <mml:mi>th</mml:mi> </mml:msup> </mml:math> October 2018 from spaceport in Kourou, French Guiana, spacecraft now en route Two orbiters have been sent Mercury will be put into dedicated, polar orbits around...
Abstract On 2022 February 15, an impressive filament eruption was observed off the solar eastern limb from three remote-sensing viewpoints, namely, Earth, STEREO-A, and Solar Orbiter. In addition to representing most-distant at extreme ultraviolet wavelengths—captured by Orbiter's field of view extending above 6 R ⊙ —this event also associated with release a fast (∼2200 km s −1 ) coronal mass ejection (CME) that directed toward BepiColombo Parker Probe. These two probes were separated 2° in...
The ESA-JAXA BepiColombo mission will provide simultaneous measurements from two spacecraft, offering an unprecedented opportunity to investigate magnetospheric and exospheric dynamics at Mercury as well their interactions with the solar wind, radiation, interplanetary dust. Many scientific instruments onboard spacecraft be completely, or partially devoted study near-space environment of complex processes that govern it. issues remain unsolved even after MESSENGER ended in 2015. specific...
Abstract The magnetometer instrument MPO-MAG on-board the Mercury Planetary Orbiter (MPO) of BepiColombo mission en-route to is introduced, with its design, calibration and scientific targets. comprised two tri-axial fluxgate magnetometers mounted on a 2.9 m boom are 0.8 apart. They monitor magnetic field up 128 Hz in $\pm 2048$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>±</mml:mo> <mml:mn>2048</mml:mn> </mml:math> nT range. MPO will be injected into an initial $480...
On 2020 April 19 a coronal mass ejection (CME) was detected in situ by Solar Orbiter at heliocentric distance of about 0.8 AU. The CME later observed on 20th the Wind and BepiColombo spacecraft whilst located very close to Earth. This presents good opportunity for triple radial alignment study, as were separated less than 5$^\circ$ longitude. source CME, which launched 15th, an almost entirely isolated streamer blowout. STEREO-A event remotely from -75.1$^\circ$ longitude, is exceptionally...
Abstract The dual spacecraft mission BepiColombo is the first joint between European Space Agency (ESA) and Japanese Aerospace Exploration (JAXA) to explore planet Mercury. was launched from Kourou (French Guiana) on October 20th, 2018, in its packed configuration including two spacecraft, a transfer module, sunshield. cruise trajectory long journey into inner heliosphere, it includes one flyby of Earth (in April 2020), Venus 2020 August 2021), six Mercury (starting before orbit insertion...
Abstract We report the result of first search for multipoint in situ and imaging observations interplanetary coronal mass ejections (ICMEs) starting with Solar Orbiter (SolO) data 2020 April–2021 April. A exploration analysis is performed including visualizations magnetic-field plasma made by five spacecraft SolO, BepiColombo, Parker Probe (PSP), Wind, STEREO-A, connection coronagraph heliospheric from STEREO-A/SECCHI SOHO/LASCO. identify ICME events that could be unambiguously followed...
Abstract On 2022 February 15–16, multiple spacecraft measured one of the most intense solar energetic particle (SEP) events observed so far in Solar Cycle 25. This study provides an overview interesting observations made by during this event. Parker Probe (PSP) and BepiColombo were close to each other at 0.34–0.37 au (a radial separation ∼0.03 au) as they impacted flank associated coronal mass ejection (CME). At about 100° retrograde direction 1.5 away from Sun, radiation detector on board...
Abstract BepiColombo has a larger and in many ways more capable suite of instruments relevant for determination the topographic, physical, chemical mineralogical properties Mercury’s surface than carried by NASA’s MESSENGER spacecraft. Moreover, BepiColombo’s data rate is substantially higher. This equips it to confirm, elaborate upon, go beyond MESSENGER’s remarkable achievements. Furthermore, geometry orbital science campaign, beginning 2026, will enable make uniformly resolved...
Abstract We present a comprehensive statistical study of magnetic holes, defined as localized decreases the field strength at least 50%, in solar wind near Mercury, using MESSENGER orbital data. investigate distributions several properties such scale size, depth, and associated rotation. show that are very similar for linear holes (with rotation across less than 25°) rotational (rotations >25°), except with large rotations (≳140°). Solar hole sizes follow log‐normal distribution, which we...
Predictions of coronal mass ejections (CMEs) and solar energetic particles (SEPs) are a central issue in space weather forecasting. In recent years, interest predictions has expanded to include impacts at other planets beyond Earth as well spacecraft scattered throughout the heliosphere. this sense, scope science now encompasses whole heliospheric system, multi-point measurements transients can provide useful insights validations for prediction models. work, we aim analyse inner context...
Fast coronal mass ejections (CMEs) drive the most severe geomagnetic storms. Forecasting their properties upstream of Earth has, in past, required sophisticated numerical models to be developed, run, and refined by experts. In this study, we present a new global MHD model for initiating following evolution CMEs from outer corona 1~AU. Based on successful astrophysical code, PLUTO, heliospheric (sunRunner3D) is easy install, set up, requiring relatively modest computer resources. To...
Abstract Orbital data from the Magnetometer on MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft allow investigation of magnetic fields induced at top Mercury's core by time‐varying magnetospheric fields. We used 15 Mercury years observations magnetopause position as well field inside magnetosphere to establish presence magnitude an annual induction signal. Our results indicate change in internal axial dipole term, g 1 0 , 7.5 9.5 nT. For negligible mantle...
Abstract. The occurrence rate of linear and pseudo magnetic holes has been determined during MESSENGER's cruise phase starting from Venus (2007) arriving at Mercury (2011). It is shown that the holes, defined as a maximum 10∘ rotation field over hole, slowly decreases to Venus. between 10 45∘ have mostly constant rate.
Abstract Mercury is embedded in a tenuous and highly anisotropic sodium exosphere, generated mainly by plasma‐surface interactions. The absolute values of the ion density are still under debate. Observations MESSENGER's Fast Imaging Plasma Spectrometer (FIPS) instrument suggest exospheric ions to be several orders magnitude lower than upstream solar wind density, indicating that exosphere has no substantial influence on magnetospheric current systems. However, MESSENGER magnetic field...
Abstract In preparation for the ESA/JAXA BepiColombo mission to Mercury, thematic working groups had been established coordinating activities within Science Working Team in specific fields. Here we describe scientific goals of Geodesy and Geophysics Group (GGWG) that aims at addressing fundamental questions regarding Mercury’s internal structure evolution. This multidisciplinary investigation will also test gravity laws by using planet Mercury as a proof mass. The instruments on Planetary...
Abstract We present simulation results of a gradual solar energetic particle (SEP) event detected on 2021 October 9 by multiple spacecraft, including BepiColombo (Bepi) and near-Earth spacecraft such as the Advanced Composition Explorer (ACE). A peculiarity this is that presence high-speed stream (HSS) affected low-energy ion component (≲5 MeV) SEP at both Bepi ACE, despite HSS having only modest wind speed increase. Using EUHFORIA (European Heliospheric FORecasting Information Asset)...
Multi-spacecraft observations of solar energetic particle (SEP) events not only enable a deeper understanding and development acceleration transport theories but also provide important constraints for model validation efforts. However, because computational limitations, given physics-based SEP is usually best suited to capture particular phase an event, rather than its whole from onset through decay. For example, magnetohydrodynamic (MHD) models the heliosphere often incorporate transients...
Abstract Mercury has a global magnetic field that is unique in our solar system. It dominated by weak axial dipole and substantial quadrupole contribution. The tilt which smaller than one degree an offset of the equator toward north about 20% planetary radius. only dynamo model succeeds continuously reproducing these features without having to rely on unrealistic heat‐flux pattern through core‐mantle boundary double‐diffusive Takahashi et al. (2019),...
BepiColombo, the joint ESA-JAXA mission on route to planet Mercury, was launched in 2018. After eight successful planetary flybys, spacecraft had its final Mercury flyby 08 Jan 2025. The PICAM (Planetary Ion Camera) instrument, part of SERENA package, operational from 48 hours prior closest encounter, until afterwards. This ion sensor successfully monitored upstream solar wind, as well magnetospheric and ions at vicinity Mercury. Near planet, operated mass spectrometry mode using Hadamard...
The BepiColombo mission to Mercury consists of two spacecraft MPO and MIO was launched in 2018. During the cruise phase towards target performed its last close flyby near on 8 Jan 2025 (MSB6). This before going into orbit around innermost planet at end 2026. We report particle results from Mass Spectrum Analyzer MSA Planetary Ion Camera PICAM onboard together with magnetic field data MAG hybrid simulation during this flyby. measured solar wind upstream recorded magnetospheric magnetosheath...