Search Publications
Electron dynamics in small magnetospheres. Insights from global, fully kinetic plasma simulations of the planet Mercury
Henri, Pierre; André, Nicolas; Aizawa, Sae +4 more
Context. The planet Mercury possesses a small but highly dynamic magnetosphere in which the role and dynamics of electrons are still largely unknown.
Aims: We aim to model the global dynamics of solar-wind electrons impinging on Mercury's magnetosphere. Particular relevance is given to local acceleration processes and the global circulation p…
Modeling of Joint Parker Solar Probe-Metis/Solar Orbiter Observations
Zank, G. P.; Zhao, L. -L.; Telloni, D. +1 more
We present the first theoretical modeling of joint Parker Solar Probe (PSP)-Metis/Solar Orbiter (SolO) quadrature observations. The combined observations describe the evolution of a slow solar wind plasma parcel from the extended solar corona (3.5-6.3 R ⊙) to the very inner heliosphere (23.2 R ⊙). The Metis/SolO instrument re…
Phase-resolved X-ray spectroscopy of PSR B0656+14 with SRG/eROSITA and XMM-Newton
Maitra, Chandreyee; Haberl, Frank; Potekhin, Alexander Y. +13 more
We present a detailed spectroscopic and timing analysis of X-ray observations of the bright pulsar PSR B0656+14. The observations were obtained simultaneously with eROSITA and XMM-Newton during the calibration and performance verification phase of the Spektrum-Roentgen-Gamma mission (SRG). The analysis of the 100 ks deep observation of eROSITA is …
Water, hydrogen cyanide, carbon monoxide, and dust production from distant comet 29P/Schwassmann-Wachmann 1
Küppers, M.; Hartogh, P.; Lellouch, E. +13 more
Context. 29P/Schwassmann-Wachmann 1 is a distant Centaur/comet, showing persistent CO-driven activity and frequent outbursts.
Aims: We aim to better characterize its gas and dust activity from multiwavelength observations performed during outbursting and quiescent states.
Methods: We used the HIFI, PACS and SPIRE instruments of the Hersc…
In-orbit Timing Calibration of the Insight-Hard X-Ray Modulation Telescope
Zhang, Shu; Li, Xiaobo; Zhang, Shuang-Nan +24 more
We describe the timing system and the timing calibration results of the three payloads on board the Insight-Hard X-ray Modulation Telescope (Insight-HXMT). These three payloads are the High Energy X-ray telescope (HE; 20-250 keV), the Medium Energy X-ray telescope (ME; 5-30 keV), and the Low Energy X-ray telescope (LE; 1-10 keV). We present a meth…
Radio Detection of an Elusive Millisecond Pulsar in the Globular Cluster NGC 6397
Fu, Xiaoting; Tsai, Chao-Wei; Freire, Paulo C. C. +32 more
We report the discovery of a new 5.78 ms period millisecond pulsar (MSP), PSR J1740-5340B (NGC 6397B), in an eclipsing binary system discovered with the Parkes radio telescope (now also known as Murriyang) in Australia and confirmed with the MeerKAT radio telescope in South Africa. The measured orbital period, 1.97 days, is the longest among all e…
The VMC survey - XLVI. Stellar proper motions in the centre of the Large Magellanic Cloud
de Grijs, Richard; Ripepi, Vincenzo; Cioni, Maria-Rosa L. +7 more
We present proper motion (PM) measurements within the central region of the Large Magellanic Cloud (LMC), using near-infrared data from the VISTA survey of the Magellanic Cloud system (VMC). This work encompasses 18 VMC tiles covering a total sky area of ~28 deg2. We computed absolute stellar PMs from multiepoch observations in the K
Tracing Accretion onto Herbig Ae/Be Stars Using the Brγ Line
Calvet, Nuria; Espaillat, Catherine C.; Grant, Sierra L. +2 more
Accretion plays an important role in protoplanetary disk evolution, and it is thought that the accretion mechanism changes between low- and high-mass stars. Here we characterize accretion in intermediate-mass, pre-main-sequence Herbig Ae/Be (HAeBe) stars to search for correlations between accretion and system properties. We present new high-resolu…
An Old, Metal-rich Accreted Stellar Component in the Milky Way Stellar Disk
Feuillet, Diane K.; Feltzing, Sofia; Bensby, Thomas +1 more
We study the possibility that the Milky Ways' cool stellar disk includes mergers with ancient stars. Galaxies are understood to form in a hierarchical manner, where smaller (proto-)galaxies merge into larger ones. Stars in galaxies, like the Milky Way, contain in their motions and elemental abundance tracers of past events and can be used to disen…
Geminga SNR: Possible Candidate of the Local Cosmic-Ray Factory
Yuan, Qiang; Liu, Wei; Bi, Xiao-Jun +5 more
The precise measurements of energy spectra and anisotropy could help us uncover the local cosmic-ray accelerators. Our recent works have shown that spectral hardening above 200 GeV in the energy spectra and transition of large-scale anisotropy at ~100 TeV are of local source origin. Less than 100 TeV, both spectral hardening and anisotropy explici…