Search Publications
Missions
Journals
Publication Years
The Albedos, Sizes, Colors, and Satellites of Dwarf Planets Compared with Newly Measured Dwarf Planet 2013 FY27
Sheppard, Scott S.; Fernandez, Yanga R.; Moullet, Arielle
2013 FY27 is the ninth intrinsically brightest Trans-Neptunian Object (TNO). We used ALMA at thermal wavelengths and Magellan in the optical to determine 2013 FY27's size and albedo for the first time and compare it to other dwarf planets. We found 2013 FY27 has a geometric albedo of {p}V={0.17}-0.030+0.045 and eff…
New Features of Parenago's Discontinuity from Gaia DR1 Data
Tsvetkov, A. S.; Vityazev, V. V.; Popov, A. V. +3 more
The velocity field of main-sequence stars and red giants from the TGAS catalogue with heliocentric distances up to 1.5 kpc has been analyzed for various spectral types. To estimate the influence of a low accuracy of stellar parallax measurements on the results of a kinematic analysis of distant stars, first we have studied in detail how the kinema…
Searching for the lost Unicorn: a prominent feature in the radial velocity distribution of stars in Vela from Gaia DR2 data
de la Fuente Marcos, R.; de la Fuente Marcos, C.
Stellar streams are ubiquitous in the Galactic halo and they can be used to improve our understanding of the formation and evolution of the Milky Way as a whole. The so-called Monoceros Ring might have been the result of satellite accretion. Guglielmo et al. have used N-body simulations to search for the progenitor of this structure. Their analysi…
The First BVRcIc Precision Observations and Preliminary Photometric Analysis of the Near Contact TYC 1488-693-1
Caton, D. B.; Hill, R.; Samec, R. G. +1 more
TYC 1488-693-1 is an ~F2 type (T ~6750 K) eclipsing binary. It was observed in April and May 2015 at Dark Sky Observatory in North Carolina with the 0.81-m reflector of Appalachian State University. Six times of minimum light were determined from our present observations, which include two primary eclipses and four secondary eclipses. In addition,…
Erratum: Correction to: Grad-Shafranov reconstruction of magnetohydrostatic equilibria with nonisotropic plasma pressure: the theory
Teh, Wai-Leong
After publication of this article (Teh 2018), the author has noticed some error with the statement in the abstract and discussion sections.
Variability Analysis of δ Scuti Candidate Stars
Tautvaišienė, Gražina; Pakštienė, Erika; Janulis, Rimvydas +5 more
The Hipparcos catalog contains stars suspected to be δ Scuti variables for which extensive ground-based observations and characterization of variability are necessary. Our aim was to characterize variability of 13 candidates to δ Scuti type stars. We obtained 24 215 CCD images and analyzed stellar light curves using the Period04 program. Twelve δ …
High-resolution Observations of Cen A: Yellow and Red Supergiants in a Region of Jet-induced Star Formation?
Nishiyama, S.; Labadie, L.; Britzen, S. +5 more
We present the analysis of near-infrared (NIR), adaptive optics Subaru and archived HST imaging data of a region near the northern middle lobe of the Centaurus A (Cen A) jet, at a distance of ∼15 kpc northeast from the center of NGC5128. Low-pass filtering of the NIR images reveals a strong—> 3σ above the background mean—signal at the expected …
Diagnostics of Closed Magnetic Flux Depletion in the Near-Earth Magnetotail During the Substorm Growth Phase
Gordeev, E. I.; Sergeev, V. A.; Shinohara, I. +1 more
Based on magnetohydrodynamics simulations, it was recently suggested that magnetotail reconfiguration during the substorm growth phase results from combined action of two large-scale processes: (1) open magnetic flux accumulation (OMFA) in the tail lobes and (2) closed magnetic flux depletion (CMFD) in the near-Earth tail, caused by flux evacuatio…
SOFIA/FORCAST Observations of the Luminous Blue Variable Candidates MN 90 and HD 168625
Smith, Nathan; Gehrz, Robert D.; Shenoy, Dinesh +1 more
We present Stratospheric Observatory for Infrared Astronomy (SOFIA)/Faint Object infraRed CAmera for the SOFIA Telescope (FORCAST) imaging of the circumstellar dust shells surrounding the luminous blue variable candidates MN 90 and HD 168625 to quantify the mineral abundances of the dust and to constrain the evolutionary state of these objects. Ou…
X-Ray Telescope (XRT) Aboard Hinode: Key Instrumental Features and Scientific Highlights
Sakao, Taro