Search Publications
In situ detection of the electron diffusion region of collisionless magnetic reconnection at the high-latitude magnetopause
Zhang, Hui; Zong, Qiu-Gang
The Milky Way Rotation Curve Revisited
Krełowski, J.; Strobel, A.; Galazutdinov, G.
The paper revisits the problem described in detail in our Paper I (Galazutdinov et al.) concluding that the rotation curve of the thin gaseous Galactic disk, represented by the CaII lines, is Keplerian outside the solar orbit rather than flat. Now we apply new trigonometric Gaia parallaxes, published in the Data Release 2. We demonstrate that the …
Spectroscopic classification and Gaia DR2 parallaxes of new nearby white dwarfs among selected blue proper motion stars
Jahreiß, H.; Schwope, A.; Pelisoli, I. +2 more
Aims: With our low-resolution spectroscopic observing programme for selected blue proper motion stars, we tried to find new white dwarfs (WDs) in the solar neighbourhood.
Methods: We used the Lépine & Shara Proper Motion (LSPM) catalogue with a lower proper motion limit of 150 mas yr-1 and the Second US Naval Observatory C…
Reduced magneto-hydrodynamic theory of coherent magnetic chains in the solar wind
Alexandrova, Olga; Maksimović, Milan; Jovanović, Dušan +1 more
An analytic theory is presented of magnetic structures in collisionless, high-β plasmas. Using a reduced magnetohydrodynamic model, a stationary nonlinear solution is constructed in the form of a Kelvin-Stuart cat's eyes chain of magnetic islands, on the spatial scale that exceeds the characteristic ion lengths. The solution is imbedded in a backg…
XMM-Newton Survey of Local O VII Absorption Lines in the Spectra of Galactic X-Ray Sources
Fang, Taotao; Luo, Yang; Ma, Renyi
The detection of highly ionized metal absorption lines in the X-ray spectra of the Galactic X-ray binaries (XRBs) implies the distribution of hot gas along the sightline toward the background sources. However, the origin of this hot gas is still unclear: it can arise in the hot interstellar medium (ISM), or is intrinsic to the XRBs. In this paper,…
The Connection between Different Tracers of the Diffuse Interstellar Medium: Kinematics
Lambert, D. L.; Federman, S. R.; Goldsmith, Paul F. +4 more
Using visible, radio, microwave, and submillimeter data, we study several lines of sight toward stars generally closer than 1 kpc on a component-by-component basis. We derive the component structure seen in absorption at visible wavelengths from Ca II, Ca I, K I, CH, CH+, and CN and compare it to emission from H I, CO and its isotopolog…
Extraterrestrial lava lakes
Lopes, Rosaly M. C.; Radebaugh, Jani; Byrne, Paul +4 more
Active lava lakes are rare on Earth, with only ten documented examples, all formed by lavas of basaltic composition and housed inside summit craters or calderas. The existence of lava lakes on other planetary bodies may imply similarities in either composition or volcano-tectonic settings, and so has important implications for understanding the li…
Absolute Dimensions and Evolutionary Status of the Semi-detached Algol W Ursae Minoris
Koo, Jae-Rim; Hong, Kyeongsoo; Lee, Jae Woo +2 more
Double-lined eclipsing binaries allow accurate and direct determination of fundamental parameters such as mass and radius for each component, and they provide important constraints on the stellar structure and evolution models. In this study, we aim to determine a unique set of binary parameters for the Algol system W UMi and to examine its evolut…
Revealing Dusty Supernovae in High-redshift (Ultra)Luminous Infrared Galaxies through Near-infrared Integrated Light Variability
Yan, Haojing; Ma, Zhiyuan; Beacom, John F. +1 more
Luminous and ultra-luminous infrared galaxies ((U)LIRGs) are rare today but are increasingly abundant at high redshifts. They are believed to be dusty starbursts, and hence should have high rates of supernovae (multiple events per year). Due to their extremely dusty environment, however, such supernovae could only be detected in rest-frame infrare…
The light-toned stratified sedimentary rock exposures in western Juventae Chasma, Mars, in context
Sarkar, Ranjan; Edgett, Kenneth S.; Singh, Pragya +1 more
Juventae Chasma, an isolated depression northeast of the Valles Marineris trough system, hosts four mounds of light-toned, layered materials. These are erosional remnants interpreted to consist of sedimentary rocks. The geological setting of Juventae Chasma is a complex amalgamation of terrains and surfaces of different morphologies, ages, and str…