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Asymmetric Transport of the Earth’s Polar Outflows by the Interplanetary Magnetic Field
Feng, Xueshang; Huang, Can; Li, Kun +3 more
The polar outflows, as an important plasma source of the Earth’s magnetosphere, usually exhibit significant north-south asymmetries, which can strongly affect the plasma distributions in the magnetotail lobe and perhaps contribute to the substorm triggering. But the mechanism of the asymmetric transport of these outflows is still unclear. In this …
Probing Coronal Magnetic Fields with Sungrazing Comets: H I Lyα from Pickup Ions
Raymond, J. C.; Giordano, S.
Observations of sungrazing comets can be used to probe the solar corona, to study the composition of the comets, and to investigate the plasma processes that govern the interaction between the coronal plasma and cometary gas. UVCS observations of the intensities and line profiles of H I Lyα trace the density, temperature, and outflow speed of the …
Relating the Carriers of λ5797.1 Diffuse Interstellar Band and λ5800 Red Rectangle Band
Adams, Keir; Oka, Takeshi
The emission spectra of the λ5800 Red Rectangle Band (RRB) are simulated at all regions of the Red Rectangle Nebula, utilizing a polar carbon chain model previously developed for the λ5797.1 diffuse interstellar band (DIB) in absorption in the interstellar medium. If high radiative temperatures are assumed, radiative pumping of numerous rotational…
Search for exoplanetary transits in the Galactic bulge
Minniti, D.; Villanova, S.; Cortés, C. C.
A search for extrasolar planetary transits using extended Kepler mission (K2) campaigns 9 and 11 revealed five new candidates towards the Galactic bulge. The stars EPIC 224439122, 224560837, 227560005, 230778501 and 231635524 are found to have low-amplitude transits consistent with extrasolar planets, with periods P = 35.1695, 3.6390, 12.4224, 17.…
Investigation of the stellar content in the IRAS 05168+3634 star-forming region
Azatyan, N. M.
Aims: We report the investigation results of the structure and content of a molecular cloud surrounding the source IRAS 05168+3634 (also known as Mol 9).
Methods: We present a photometric analysis using the data of J, H, K UKIDSS, [3.6], [4.5] µm Spitzer-IRAC and 3.4, 4.6, 12, 22 µm WISE databases. A multi-color criteria was …
Objects of the Catalog of Orbits of Visual Binary Stars in Gaia DR2
Chulkov, D. A.
Cross-identification is made for the Catalog of Orbits of Visual Binary Stars and Gaia DR2. At least one component has been matched for 88% systems, for 15% identification is available for both stars. Systems with substantially different parallaxes of components are found, which are the candidates to be the optical pairs. It's shown that published…
ExoMars Flush Air Data System: Experimental and Numerical Investigation
Schleutker, Thorn; Gülhan, Ali; Hove, Bart Van +1 more
Variability in high‑mass X‑ray binaries
Wilms, J.; Pottschmidt, K.; Grinberg, V. +5 more
Strongly magnetized, accreting neutron stars show periodic and aperiodic variability over a wide range of time scales. By obtaining spectral and timing information on these different time scales, we can have a closer look into the physics of accretion close to the neutron star and the properties of the accreted material. One of the most prominent …
Search for Evolutionary Changes in the Periods of Cepheids: V532 Cyg
Berdnikov, L. N.
For the low-amplitude Cepheid V532 Cyg we have constructed an O - C diagram spanning a time interval of 121 years. The O - C diagram has the shape of a parabola, which has made it possible to determine for the first time the quadratic light elements and to calculate the rate of evolutionary decrease in the period, dP/dt = -0.248 (±0.067) s yr…
Comparison of proper motions in declination for 387 Gaia DR2 and HIPPARCOS stars from ILS observations over many decades
Taris, F.; Damljanović, G.
Context. The second solution of the Gaia catalog, which has been available since April 2018, plays an important role in the realization of the future Gaia reference frame. Since 1997, the reference frame has been materialized by the optical HIPPARCOS positions of about 120 000 stars. The HIPPARCOS has been compared with and linked to the Internati…