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The Impact of Inclination-dependent Attenuation on Ultraviolet Star Formation Rate Tracers
Basu-Zych, Antara; Garofali, Kristen; Lehmer, Bret D. +3 more
We examine and quantify how hybrid (e.g., UV+IR) star formation rate (SFR) estimators and the A FUV-β relation depend on inclination for disk-dominated galaxies using spectral energy distribution modeling that utilizes the inclination-dependent attenuation curves described in Doore et al. We perform this analysis on a sample of 133 disk…
The H α luminosity and stellar mass dependent clustering of star-forming galaxies at 0.7 < z < 1.5 with 3D-HST
Wake, David; Zheng, Zheng; Clontz, Callie
We present measurements of the dependence of the clustering amplitude of galaxies on their star formation rate (SFR) and stellar mass (M*) at 0.7 < z < 1.5 to assess the extent to which environment affects these properties. While these relations are well determined in the local Universe, they are much more poorly known at earlier …
Spatial Distribution and Low-frequency Disturbance Modulation of Magnetosheath Ion Polytropic Index
Cao, Jinbin; Pang, Xuexia; Geng, Xiyao +6 more
We, using the Cluster data from 2001 to 2010, studied spatial distribution of the ion polytropic index in the magnetosheath, and the modulation of polytropic process by the low-frequency disturbances (4-18 mHz). The total of 30,3283 samples is divided into two sorts: quasi-perpendicular and quasi-parallel propagating ones. The median polytropic in…
Symbiotic Nature of the Zirconium Star CSS 1102
Ikonnikova, N. P.; Tatarnikov, A. M.; Dodin, A. V. +2 more
Based on the spectroscopic observations carried out with the 2.5-m telescope at the Caucasus Mountain Observatory (CMO) of the Sternberg Astronomical Institute (SAI), we have established the symbiotic nature of the poorly studied S star CSS 1102. The Balmer jump in emission is observed in the object's spectrum, and there are lines typical for gase…
Orbit determination methods for interplanetary missions: development and use of the Orbit14 software
Schettino, Giulia; Serra, Daniele; Tommei, Giacomo +1 more
In the last years, a new generation of interplanetary space missions have been designed for the exploration of the solar system. At the same time, radio-science instrumentation has reached an unprecedented level of accuracy, leading to a significant improvement of our knowledge of celestial bodies. Along with this hardware upgrade, software produc…
On the Nature of the Photospheric Horizontal Magnetic Field Increase in Major Solar Flares
Wang, Yuming; Sun, Xudong; Liu, Lijuan +2 more
The rapid increase of the horizontal magnetic field (B h ) around the flaring polarity inversion line is the most prominent photospheric field change during flares. It is considered to be caused by the contraction of flare loops, the details behind which is still not fully understood. Here we investigate the B h increase i…
A New Approach to Kinetic Energy Flux at the Different Frequencies above the IRIS Bright Points
Tavabi, Ehsan; Sadeghi, Rayhane
Various bright structures abound in the chromosphere playing an essential role in the dynamics and evolution therein. Tentatively identifying the wave characteristics in the outer solar atmosphere helps to understand this layer better. One of the most significant aspects of these characteristics is the wave phase speed (PS), which is a dominant co…
Evidence for thermokarst depressions on comet 67P/Churyumov-Gerasimenko: An interplanetary comparison
Jorda, L.; Groussin, O.; Bouley, S. +3 more
Aims: The nucleus of comet 67P/Churyumov-Gerasimenko (67P) is ice rich and shows evidence of morphologies driven by sublimation processes. In particular, the fine-particle deposits (FPD) that cover its surface reveal depressions of many tens of meters. A detailed analysis of these morphologies and of the properties of the fine-particle deposi…
A search for annihilating dark matter in 47 Tucanae and Omega Centauri
Staveley-Smith, Lister; Bekki, Kenji; Westmeier, Tobias +1 more
A plausible formation scenario for the Galactic globular clusters 47 Tucanae (47 Tuc) and Omega Centauri $(ω$ Cen) is that they are tidally stripped remnants of dwarf galaxies, in which case they are likely to have retained a fraction of their dark matter cores. In this study, we have used the ultra-wide band receiver on the Parkes telescope (Murr…
On survival of dust grains in the sublimation zone of cold white dwarfs
Shestakova, Lyubov I.; Kenzhebekova, Akmaral I.; Serebryanskiy, Aleksander V.
We consider a mechanism for the deposition of dust grains on to the surface of cold white dwarfs (WDs). Calculations show that grains can fall on to a cold WD directly, without reaching the phase of complete evaporation, if the parent bodies and the grains orbit on elongated, close to parabolic, orbits. To this end, we calculated the dynamics of e…