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Using CME Progenitors to Assess CME Geoeffectiveness
Martens, Petrus; Aparna, V.; Mundra, Kashvi
There have been a few previous studies claiming that the effects of geomagnetic storms strongly depend on the orientation of the magnetic cloud portion of coronal mass ejections (CMEs). Aparna & Martens, using halo-CME data from 2007 to 2017, showed that the magnetic field orientation of filaments at the location where CMEs originate on the Su…
Searching for periodic variations in radial velocities after the removal of orbital motions of spectroscopic binaries
Sato, Bun'ei; Itoh, Yoichi; Katoh, Noriyuki
This study focuses on periodic variations of radial velocities (RVs) after removing the orbital motion of 33 spectroscopic binaries. The RVs were monitored from 2003 to 2012 and published in Katoh et al. (2013, AJ, 145, 41). Their RV precision was determined to be ∼10 m s-1 utilizing an I2 cell. We investigated the periodic v…
Martian roughness analogues of Europan terrains for radar sounder investigations
Gerekos, Christopher; Grima, Cyril; Steinbrügge, Gregor +5 more
Understanding the implications of Europa's roughness on backscattered radar signals is central to ensure that the future radar sounding instruments heading for the Jovian icy moons, the Radar for Icy Moons Exploration (RIME) and the Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON), will yield fruitful observations over thei…
Towards realistic estimates of solar global oscillation mode-coupling measurement noise
Woodard, M. F.
Time series of the medium-l spherical-harmonic decomposition of SOHO/MDI Doppler images were used to investigate the noise of solar-oscillation mode-coupling measurements and to reveal the coupling signatures of global-scale Rossby-waves and magnetic activity. A theoretical model of mode-coupling noise was developed starting from the assumption th…
Dissecting the Quadruple Binary Hyad vA 351 Masses for Three M Dwarfs and a White Dwarf
Torres, Guillermo; Latham, David W.; Skiff, Brian A. +8 more
We extend results first announced by Franz et al., that identified vA 351 = H346 in the Hyades as a multiple star system containing a white dwarf. With Hubble Space Telescope Fine Guidance Sensor fringe tracking and scanning, and more recent speckle observations, all spanning 20.7 years, we establish a parallax, relative orbit, and mass fraction f…
The Einstein Ring GAL-CLUS-022058s: a Lensed Ultrabright Submillimeter Galaxy at z = 1.4796
Rebolo, R.; Dannerbauer, H.; Díaz-Sánchez, A. +2 more
We report an ultrabright lensed submillimeter galaxy at zspec = 1.4796, identified as a result of a full-sky cross-correlation of the AllWISE and Planck compact source catalogs aimed at searching for bright submillimeter galaxies at z ~ 1.5-2.8. Atacama Pathfinder Experiment (APEX)/LABOCA observations of the candidate galaxy reveal a so…
Unveiling the nature of clusters in the Cygnus region. I. The embedded cluster DB2001-22
Molina Lera, J. A.; Baume, G.; Gamen, R. +2 more
The Cygnus region harbours a vast diversity of rich stellar complexes. Hence, it is ideal for studying recently formed stellar clusters, and investigate how the feedback effect and radiation emitted by its massive stars modifies the interstellar medium giving place to induced star forming processes. This is the case of the small and poorly studied…
BGLS-based method of estimating the rotational periods of asteroids
Ren, Yan-Qiong; Lu, Xiao-Ping; Liang, Yong
As the asteroid rotational period is important to the study of the properties of asteroids (e.g., super-fast rotators have structures owing an internal cohesion (rather than being rubble piles bounded by gravity only) so as not to fly apart), constructing an effective and fast method used to search the period attracts much researchers' attention. …
A thermophysical and dynamical study of the Hildas, (1162) Larissa, and (1911) Schubart
Marshall, J. P.; Müller, T. G.; Drass, H. +3 more
The Hilda asteroids are among the least studied populations in the asteroid belt, despite their potential importance as markers of Jupiter's migration in the early Solar system. We present new mid-infrared observations of two notable Hildas, (1162) Larissa, and (1911) Schubart, obtained using the Faint Object infraRed CAmera for the SOFIA Telescop…
An appraisal of crustal deformation of the East Coprates Planum, Mars
Dasgupta, Dipayan; Baul, Shankhadeep
Terrestrial planets in the Solar System have been impacted by meteorites from the very beginning of their existence. Mars is a planet that preserves features of tectonic deformation as well as impact-related deformation. East Coprates Planum (ECP) is an area situated on the equatorial region located just on the south of the dichotomy boundary of M…