Search Publications
The nearby astrometric-spectroscopic binary star Hip 68682
Wang, Xiaoli; Fu, Yanning; Chen, Yue +1 more
The nearby astrometric-spectroscopic binary star Hip 68682 has an orbital period of ∼ 9.88 yr. The dynamical state (component masses and kinematic parameters) of this system is redetermined by fitting all the observational data available to us, including the radial velocity data (RVD), the relative position data (RPD), and the Hipparcos Intermedia…
Ion kinetic effects linked to magnetic field discontinuities in the slow Alfvénic wind observed by Solar Orbiter in the inner heliosphere
D'Amicis, Raffaella; Perrone, Denise; Perri, Silvia +2 more
Slow solar wind, sharing magnetic and plasma properties typical of fast wind, the so-called slow Alfvénic wind, has been widely observed in the heliosphere. Here, we report an analysis of the turbulent properties of a slow Alfvénic stream observed by Solar Orbiter at 0.64 AU. This solar wind stream is characterized by well distinguishable regions,…
Miras as a distance indicator in the CSST, JWST, and Gaia era
Sun, Yan; Zhang, Bo; Chen, Wen +5 more
Mira variables are important distance indicators owing to the clear period–luminosity relation at infrared wavelengths. We have compiled a sample of 343 Galactic Miras selected from the American Association of Variable Star Observers database and Gaia Data Release 3. We used V-band observations from the American Association of Variable Star Observ…
Exploring the impact of imaging cadence on inferring CME kinematics
Pant, Vaibhav; Banerjee, Dipankar; Patel, Ritesh +2 more
The kinematics of coronal mass ejections (CMEs) are crucial for understanding their initiation mechanism and predicting their impact on Earth and other planets. With most of the acceleration and deceleration occurring below 4 R⊙, capturing this phase is vital to better understand their initiation mechanism. Furthermore, the kinematics of CMEs in t…
The energetic storm particle events of 3 November 2021
Marcucci, Maria Federica; Consolini, Giuseppe; Chiappetta, Federica +3 more
Observations of energetic particles at interplanetary shocks are important to study acceleration mechanisms and their connection with magnetohydrodynamic turbulence. Energetic storm particle (ESP) events are increases in proton fluxes that occur locally at the passage time of interplanetary shocks. These events are more dangerous when they are sup…
The ability of CSST to determine the orbital solutions of SB1s
Wang, Xiaoli; Fu, Yanning; Chen, Yue +1 more
The single-lined spectroscopic binaries (SB1s) are composed of two components with large difference in masses and in physical properties. The orbital and physical parameters of a large number of such binary systems are unknown due to lack of necessary observations. Compared with SB2s, SB1s can provide much more stringent constraint to stellar evol…
Turbulent dipolarization regions in the Earth's magnetotail: ion fluxes and magnetic field changes
Kronberg, Elena A.; Blöcker, Aljona; Fedun, Viktor +4 more
In this work, we consider the dynamics of ion fluxes and magnetic field changes in turbulent regions of magnetotail dipolarizations. The data from the Cluster-II mission (magnetic field measurements from fluxgate magnetometers and energetic charged particle observations from RAPID spectrometers) were used for the analysis. We study individual even…
RCM modeling of bubble injections into the inner magnetosphere: geosynchronous orbit and the ionospheric responses
Wang, Chih-Ping; Yang, Jian; Mousavi, Ameneh +3 more
Introduction: Accurate characterization of the plasma sheet source population in the ring current region and its outer boundary at geosynchronous orbit is crucial for understanding the dynamics of the Earth's magnetosphere. The interaction between the ring current and plasma populations from the ionosphere is a focus of extensive research.Methods:…
On orbit performance of the solar flare trigger for the Hinode EUV imaging spectrometer
Warren, Harry P.; Ugarte-Urra, Ignacio; Brooks, David H. +1 more
We assess the on-orbit performance of the flare event trigger for the Hinode EUV Imaging Spectrometer. Our goal is to understand the time-delay between the occurrence of a flare, as defined by a prompt rise in soft X-ray emission, and the initiation of the response observing study. Wide (266″) slit patrol images in the He II 256.32 Å spectral line…
The impact of dimensionality reduction of ion counts distributions on preserving moments, with applications to data compression
Thompson, B.; da Silva, D.; Bard, C. +3 more
The field of space physics has a long history of utilizing dimensionality reduction methods to distill data, including but not limited to spherical harmonics, the Fourier Transform, and the wavelet transform. Here, we present a technique for performing dimensionality reduction on ion counts distributions from the MMS/FPI instrument using a data-ad…