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A geometrical description for interplanetary propagation of Earth-directed CMEs based on radiative proxies
Salas-Matamoros, C.; Sanchez-Guevara, J.
We present a 3D geometrical model to describe the propagation and expansion of coronal mass ejections (CMEs) in the interplanetary space based on radiative proxies to be implemented in previous procedures that use SXR and microwave emissions to estimate the Earth-directed CME propagation speed. We carefully selected a sample of 45 well-defined CME…
The Detached Binary TW Coronae Borealis
Nelson, Robert H.
New radial velocity and photometric data for TW CrB have been obtained, and Roche-based simultaneous analysis of RV and light curve data for the system has been accomplished for the first time, using the 2003 version of the Wilson-Devinney code. Values for the masses and radii have been obtained: M1 = 1.31 (6) Mʘ, M2
Icarus: In-situ monitoring of the surface degradation on a near-Sun asteroid
Granvik, Mikael; Lehtinen, Tuomas; Bellome, Andrea +1 more
Icarus is a mission concept designed to record the activity of an asteroid during a close encounter with the Sun. The primary science goal of the mission is to unravel the nontrivial mechanism(s) that destroy asteroids on orbits with small perihelion distances. Understanding the destruction mechanism(s) allows us to constrain the bulk composition …
Modeling of emission lines in low-ionization windsof B-type stars
Kraus, M.; Cidale, L. S.; Torres, A. F. +2 more
Motivated by the availability of new observational material provided by Gaia mission, and focused on peculiar B-type stars, we develop a model to simulate the non-LTE line profiles of ionized elements such as Ca II and Mg II. The calculation is performed for a range of effective temperature and surface gravity, for different temperature and veloci…
The Nonrelaxation of Magnetic Field Lines in Solar Wind Magnetic Reconnection Exhausts
Xu, Qi; Xu, Xiaojun; Xu, Jiaying +2 more
We present a case study using data from multiple spacecraft and statistics from the ACE spacecraft to investigate the relaxation of reconnected magnetic field lines in solar wind magnetic reconnection exhausts, which constitute one of the two outflow regions resulting from magnetic reconnection, and which are often characterized by a plasma jet, m…
On properties of coronal mass ejection-solar flare linked events
Youssef, M.
In the present paper, the relation between the CMEs and their linked solar flares is examined during the entire solar cycle 23. During this solar cycle and under certain temporal and spatial conditions, 521 CMEs linked with solar flares are selected. These selected CMEs are separated into two groups according to their time of detection, 254 Before…
Aggregation Characteristics of the Sun's Large-Scale Magnetic Field Associated with a Global Magnetic Anomaly in the Last Extended Solar Cycle
Magara, Tetsuya; An, Junmo; Lee, Hwanhee +1 more
The solar cycle represents the Sun's periodically changing magnetic state, which is potentially subject to global magnetic anomalies emerging on it. What the characteristics are of the Sun's large-scale magnetic field playing roles in these anomalies is a key to clarifying how the Sun deviates from its normal magnetic state. This article reports a…
Multiwavelength Properties of the Newly Discovered Dwarf Nova ASASSN-21kt
Sokolovsky, Kirill V.; Mukai, Koji; Lopes de Oliveira, Raimundo +1 more
We report on archival XMM-Newton and post-outburst Swift observations of the newly discovered dwarf nova ASASSN-21kt. Its pre-outburst X-ray emission is consistent with that of a collisionally ionized, thermal plasma with ${kT}={8.1}_{-2.5}^{+10.2}$ keV and LX 0.2-12 keV = 7 × 1032 erg s-1, with no clear modulation…
Updates to the Chandrayaan-1 Moon Mineralogy Mapper Archive
St. Clair, M.; Million, C.; Ianno, A.
We have produced a Planetary Data System Version 4 (PDS4) bundle that modernizes M3's crucial data archive in order to improve accessibility, discoverability, and maintainability. We discuss bundle features, background, and conversion methodology.
Spectral evolution of an eruptive polar crown prominence with IRIS observations
Li, Hui; Su, Yang; Xue, Jianchao
Prominence eruption is closely related to coronal mass ejections and is an important topic in solar physics. Spectroscopic observation is an effective way to explore the plasma properties, but the spectral observations of eruptive prominences are rare. In this paper we will introduce an eruptive polar crown prominence with spectral observations fr…