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A hybrid approach to empirical magnetosphere modeling
Tsyganenko, N. A.; Andreeva, V. A.
A new approach has been devised and explored to reconstruct magnetospheric configurations, based on spacecraft data and a synthesis of two methods of modeling the magnetic field of extraterrestrial currents. The main idea is to combine within a single framework (1) a modular structure explicitly representing separate contributions to the total fie…
A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7-1.5 - I. Nature, morphologies and equivalent widths
Sobral, David; Matthee, Jorryt; Stroe, Andra +2 more
While traditionally associated with active galactic nuclei (AGN), the properties of the C II] (λ = 2326 Å), C III] (λ, λ = 1907, 1909 Å) and C IV (λ, λ = 1549, 1551 Å) emission lines are still uncertain as large, unbiased samples of sources are scarce. We present the first blind, statistical study of C II], C III] and C IV emitters at z ∼ 0.68, 1.…
Comparing UV/EUV line parameters and magnetic field in a quiescent prominence with tornadoes
Fletcher, L.; Schmieder, B.; Labrosse, N. +2 more
Context. Understanding the relationship between plasma and the magnetic field is important for describing and explaining the observed dynamics of solar prominences.
Aims: We determine if a close relationship can be found between plasma and magnetic field parameters, measured at high resolution in a well-observed prominence.
Methods: A pr…
Coronal Jets Simulated with the Global Alfvén Wave Solar Model
Gombosi, T. I.; Toth, G.; Antiochos, S. K. +5 more
This paper describes a numerical modeling study of coronal jets to understand their effects on the global corona and their contribution to the solar wind. We implement jets into a well-established three-dimensional, two-temperature magnetohydrodynamic (MHD) solar corona model employing Alfvén-wave dissipation to produce a realistic solar-wind back…
The ultraluminous X-ray source HoII X-1: kinematic evidence of its escape from a cluster
Egorov, Oleg V.; Lozinskaya, Tatiana A.; Moiseev, Alexei V.
We analyse the structure and kinematics of ionized gas in the vicinity of the ultraluminous X-ray source (ULX) HoII X-1 in the Holmberg II galaxy using observational data obtained with a scanning Fabry-Perot interferometer in the Hα, [S II] and [O III] emission lines at the Russian 6-m telescope. Decomposition of the line profiles allows us to ide…
Nature of the warm absorber outflow in NGC 4051
Ebisawa, Ken; Mizumoto, Misaki
The narrow-line Seyfert 1 galaxy NGC 4051 is known to exhibit significant X-ray spectral/flux variations and have a number of emission/absorption features. X-ray observations have revealed that these absorption features are blueshifted, which indicates that NGC 4051 has warm absorber outflow. In order to constrain physical parameters of the warm a…
Fluxgate magnetometer offset vector determination by the 3D mirror mode method
Dougherty, M. K.; Glassmeier, K. -H.; Volwerk, M. +5 more
Fluxgate magnetometers on-board spacecraft need to be regularly calibrated in flight. In low fields, the most important calibration parameters are the three offset vector components, which represent the magnetometer measurements in vanishing ambient magnetic fields. In case of three-axis stabilized spacecraft, a few methods exist to determine offs…
Antisolar differential rotation with surface lithium enrichment on the single K-giant V1192 Orionis
Strassmeier, K. G.; Weber, M.; Granzer, T. +7 more
Context. Stars with about 1-2 solar masses at the red giant branch (RGB) represent an intriguing period of stellar evolution, I.e. when the convective envelope interacts with the fast-rotating core. During these mixing episodes freshly synthesized lithium can come up to the stellar surface along with high angular momentum material. This high angul…
Review article: Wave analysis methods for space plasma experiment
Narita, Yasuhito
A review of analysis methods is given on quasi-monochromatic waves, turbulent fluctuations, and wave-wave and wave-particle interactions for single-spacecraft data in situ in near-Earth space and interplanetary space, in particular using magnetic field and electric field data. Energy spectra for different components of the fluctuating fields, mini…
Constraining Accretion Signatures of Exoplanets in the TW Hya Transitional Disk
Tamura, Motohide; Uyama, Taichi; Hashimoto, Jun +4 more
We present a near-infrared direct imaging search for accretion signatures of possible protoplanets around the young stellar object (YSO) TW Hya, a multi-ring disk exhibiting evidence of planet formation. The Paβ line (1.282 µm) is an indication of accretion onto a protoplanet, and its intensity is much higher than that of blackbody radiation…