Search Publications
Kinematics of B-F Stars as a Function of Their Dereddened Color from Gaia and PCRV Data
Gontcharov, G. A.
Parallaxes with an accuracy better than 10% and proper motions from the Gaia DR1 TGAS catalogue, radial velocities from the Pulkovo Compilation of Radial Velocities (PCRV), accurate Tycho-2 photometry, theoretical PARSEC, MIST, YaPSI, BaSTI isochrones, and the most accurate reddening and interstellar extinction estimates have been used to analyze …
The Complexities of Interstellar Dust and the Implications for the Small-scale Structure in the Cosmic Microwave Background
Verschuur, G. L.; Schmelz, J. T.
A detailed comparison of the full range of PLANCK and Wilkinson Microwave Anisotropy Probe data for small (2° × 2°) areas of sky and the Cosmic Microwave Background Internal Linear Combination (ILC) maps reveals that the structure of foreground dust may be more complex than previously thought. If 857 and 353 GHz emission is dominated by galactic d…
Lineaments on the Surface of the Consolidated Material of the Comet 67P/Churyumov-Gerasimenko Nucleus
Keller, H. U.; Hviid, S. F.; Mall, U. +3 more
Morphologic analysis of the fragments (500 × 500 pixels) of images of comet 67P/Churyumov- Gerasimenko obtained with the OSIRIS camera for 18 regions, where the consolidated material is exposed on the surface, has been carried out. In terms of resolution, the images form a series from 0.04 to 1.29 m/pixel; consequently, the areas covered by these …
Rotational properties of magnetic chemically peculiar stars
Paunzen, E.; Bernhard, K.; Hümmerich, S. +1 more
The magnetic chemically peculiar (mCP) stars of the upper main sequence exhibit strong and globally organized magnetic fields that are inclined to the rotational axis and facilitate the development of surface abundance inhomogeneities resulting in photometric and spectroscopic variability. Photometric time series data are much easier to obtain tha…
Importance of MHD Waves Observed with Hinode
Matsumoto, Takuma
Short- and long-term variability of the ultrashort-period eclipsing RS CVn star V0648 Aur
Paunzen, E.; Srdoc, G.; Bernhard, K. +2 more
Based on observations between 2006 and 2018, revised elements of the ultrashort-period eclipsing RS CVn variable V0648 Aur are given: HJD MinI =2457800.356(3) + 0.42246710(7)°E. An analysis of the observed times of minima reveals a probable near sinusoidal oscillation with a period of about 800 days. The corresponding (O-C) values of the secondary…
Rosetta et après: le futur de l'exploration des comètes.
Crovisier, J.
This article reviews the results obtained by the Rosetta space probe on comet 67P/Churyumov-Gerasimenko and the expectations of future space exploration of comets.
Corrigendum to "The opposition effect in Saturn's main rings as seen by Cassini ISS: 2. Constraints on the ring particles and their regolith with analytical radiative transfer models" Icarus; Vol 253 (2015); Pages 311-345
Estelle, Déau
The authors report a correction to their paper relative to the Hapke (2002, 2008) parameters:
Adiabatic Heating of Electrons in the Magnetospheric Current Sheet
Petrukovich, A. A.; Artemyev, A. V.; Lukin, A. S. +1 more
Electron dynamics and acceleration in an electromagnetic field configuration modeling the current sheet configuration of the Earth's magnetotail region is investigated. A focus is made on the role of the dawn‑dusk magnetic field component By in the convection electron heating by an electric field Ey. For numerical integration…
Short timescale UV variability study in NGC 4151 using IUE data
Doddamani, Vijayakumar H.; Vedavathi, P.
IUE has made very successful long term and intense short time-scale monitoring spectroscopic study of NGC 4151, a Seyfert 1 galaxy for over nearly 18 years from its launch in 1978 to 1996. The long-term observations have been useful in understanding the complex relation between UV continuum and emission line variability Seyfert galaxies. In this p…