Search Publications
Dynamic field line draping at comet 67P/Churyumov-Gerasimenko during the Rosetta dayside excursion
Henri, Pierre; Nilsson, Hans; Behar, Etienne +9 more
Context. The Rosetta dayside excursion took place in September-October 2015 when comet 67P/Churyumov-Gerasimenko (67P/CG) was located at 1.36 AU from the Sun after it had passed perihelion on 13 August 2015 at 1.25 AU. At this time, the comet was near its most active period, and its interaction with the solar wind was expected to be at its most in…
Non-linear flow modelling of a Martian Lobate Debris Apron
Schmidt, Louise Steffensen; Hvidberg, Christine Schøtt; Kim, Jung Rack +1 more
XRB continuum fitting with sensitive high-energy X-ray detectors
Fabian, A. C.; Tomsick, J. A.; Buisson, D. J. K. +4 more
The launch of the Nuclear Spectroscopic Telescope Array (NuSTAR) heralded a new era of sensitive high-energy X-ray spectroscopy for X-ray binaries (XRBs). In this paper we show how multiple physical parameters can be measured from the accretion disc spectrum when the high-energy side of the disc spectrum can be measured precisely using NuSTAR. Thi…
Rosetta/OSIRIS observations of the 67P nucleus during the April 2016 flyby: high-resolution spectrophotometry
Lamy, P. L.; Lara, L. M.; Bertaux, J. -L. +35 more
Context. From August 2014 to September 2016, the Rosetta spacecraft followed comet 67P/Churyumov-Gerasimenko along its orbit. After the comet passed perihelion, Rosetta performed a flyby manoeuvre over the Imhotep-Khepry transition in April 2016. The OSIRIS/Narrow-Angle-Camera (NAC) acquired 112 observations with mainly three broadband filters (ce…
Constraining Stellar Parameters and Atmospheric Dynamics of the Carbon AGB star V Oph
Ohnaka, Keiichi; Carpenter, Kenneth G.; Rau, Gioia +2 more
Molecules and dust produced by the atmospheres of cool evolved stars contribute to a significant amount of the total material found in the interstellar medium. To understand the mechanism behind the mass loss of these stars, it is of pivotal importance to investigate the structure and dynamics of their atmospheres. Our goal is to verify if the ext…
The Weakening Outburst of the Young Eruptive Star V582 Aur
Cseh, B.; Kriskovics, L.; Pál, A. +17 more
V582 Aur is a pre-main-sequence FU Orionis type eruptive star, which entered a brightness minimum in 2016 March due to changes in the line-of-sight extinction. Here, we present and analyze new optical B, V, R C , and I C band multiepoch observations and new near-infrared J, H, and K S band photometric measurem…
A Statistical Study of the Magnetic Imprints of X-class Solar Flares
Ding, Mingde; Guo, Yang; Zhang, Yining +3 more
Magnetic imprints, the rapid and irreversible evolution of photospheric magnetic fields as feedback from flares in the corona, have been confirmed by many previous studies. These studies showed that the horizontal field will permanently increase at the polarity inversion line (PIL) after eruptions, indicating that a more horizontal geometry of the…
New photometric investigation of the low-mass-ratio contact binary star V1853 Orionis
Qian, Sheng-Bang; He, Jia-Jia; Sarotsakulchai, Thawicharat +3 more
Four-color charge-coupled device (CCD) light curves in the B, V, Rc and Ic bands of the total-eclipsing binary system V1853 Orionis (V1853 Ori) are presented. By comparing our light curves with those published by previous investigators, it is determined that the O’Connell effect on the light curves has disappeared. By analyzing those multi-color l…
Improved Chandrayaan-1 M3 data: A northwest portion of the Aristarchus Plateau and contiguous maria
Shkuratov, Yu.; Surkov, Ye.; Ivanov, M. +5 more
We provide and test a method to obtain significant improvement of available Chandrayaan-1 M3 data. The advance is achieved using the Gaussian λ-convolution of spectra and Fourier filtration of images. The main result is imagery of the reflectance across different wavelengths as well as parameters of 1 µm and 2 µm absorption …
ALMA Observations of the Molecular Gas in the Elliptical Galaxy NGC 3557
Espada, Daniel; Cepa, Jordi; Vila-Vilaro, Baltasar +3 more
We present the results of CO interferometric observations of the southern elliptical galaxy NGC 3557 with ALMA. We have detected both the CO(1-0) emission line and a relatively strong continuum at 3 mm. The continuum shows a flat-spectrum central unresolved source (at our angular resolution of 0.″7) and two jets, associated with the larger-scale e…