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A family for miniature, easily reconfigurable particle sensors for space plasma measurements
Barabash, S.; Wieser, M.
Over the last 15 years the Swedish Institute of Space Physics developed a line of miniaturized ion mass analyzers for space plasma studies with masses of 400-600 g and highly compact and dense design to minimize the volume. The sensors cover an energy range from few eV up to 15 keV and reach an angular coverage up to hemispherical and mass resolut…
Properties of galaxies at the faint end of the Hα luminosity function at z ~ 0.62
Villar, Víctor; Gallego, Jesús; Gómez-Guijarro, Carlos +3 more
Context. Studies measuring the star formation rate density, luminosity function, and properties of star-forming galaxies are numerous. However, it exists a gap at 0.5 < z < 0.8 in Hα-based studies.
Aims: Our main goal is to study the properties of a sample of faint Hα emitters at z ~ 0.62. We focus on their contribution to the faint end…
Sounding Rocket Observations of Active Region Soft X-Ray Spectra Between 0.5 and 2.5 nm Using a Modified SDO/EVE Instrument
Didkovsky, Leonid; Wieman, Seth; Moore, Christopher +2 more
Spectrally resolved measurements of individual solar active regions (ARs) in the soft X-ray (SXR) range are important for studying dynamic processes in the solar corona and their associated effects on the Earth's upper atmosphere. They are also a means of evaluating atomic data and elemental abundances used in physics-based solar spectral models. …
NUV Star Catalog from the Lunar-based Ultraviolet Telescope Survey: First Release
Wang, Jing; Meng, Xian-Min; Wei, Jian-Yan +7 more
We present a star catalog extracted from the Lunar-based Ultraviolet Telescope (LUT) survey program. LUT's observable sky area is a circular belt around the Moon's north pole, and the survey program covers a preferred area of about 2400 deg2 which includes a region of the Galactic plane. The data are processed with an automatic pipeline…
GeMs/GSAOI observations of La Serena 94: an old and far open cluster inside the solar circle
Carrasco, Eleazar R.; Roman-Lopes, Alexandre; Neichel, Benoit +2 more
Physical properties were derived for the candidate open cluster La Serena 94, recently unveiled by the VISTA Variables in the Vía Láctea (VVV) survey. Thanks to the exquisite angular resolution provided by Gemini South multiconjugate adaptive optics system/Gemini South Adaptive Optics Imager (GeMS/GSAOI), we could characterize this system in detai…
Mass loading at the magnetopause through the plasmaspheric plume
Tu, Jiannan; Wang, Yan; Song, Paul
An investigation of the transport of the plasmaspheric plasma to the dayside magnetopause under disturbed geomagnetic conditions associated with plasmaspheric plumes is conducted by numerical simulations using the Dynamic Fluid-Kinetic (DyFK) model. The simulations present the field-aligned density distributions and kinetic features of multiple io…
Evidence of scattering effects influenced by plasma flows in C VI 1548 Å, 1550 Å spectral lines emitted from the Sun
Vial, J. -C.; Gontikakis, C.
Aims: We search for, and study, individual spectral profiles where the complex shape of the C iv 1548 Å line is different from the shape of the simultaneously recorded C iv 1550 Å line. Such an asymmetry is not expected for line emission resulting from collisional excitation. Therefore we propose an explanation of these observations through t…
Unique Spectroscopy and Imaging of Mars with the James Webb Space Telescope
Hartogh, Paul; Lellouch, Emmanuel; Fouchet, Thierry +12 more
In this paper, we summarize the main capabilities of the James Webb Space Telescope (JWST) for performing observations of Mars. The distinctive vantage point of JWST at the Sun-Earth Lagrange point (L2) will allow sampling the full observable disk, permitting the study of short-term phenomena, diurnal processes (across the east-west axis), and lat…
Probing the photoionised outflow in the NLS1 Arakelian 564: An XMM-Newton view
Khanna, Shourya; Kaastra, Jelle. S.; Mehdipour, Missagh
We present a detailed analysis of XMM-Newton X-ray observations of the narrow-line Seyfert-1 (NLS1) galaxy Ark 564, taken between 2000 and 2011. High-resolution X-ray spectroscopy was carried out on the resultant high signal-to-noise stacked spectrum. We find three separate photoionised warm absorbers, which outflow at velocities unusually lower t…
The sun's influence on the vertical structure of the ionospheres of Venus and Mars
Girazian, Zachary Richard James
The ionospheres of Venus and Mars are important components of the planet-space boundary that play a major role in atmospheric escape processes. Characterization of these regions reveals the physical processes that control them and provides a foundation for more detailed studies of chemistry, dynamics, and energetics. At both planets the ionosphere…