Search Publications
Plasma distribution around Comet 67P in the last month of the Rosetta mission
Szego, K.; Henri, P.; Nemeth, Z. +3 more
After accompanying comet 67P/Churyumov-Gerasimenko on its journey around the Sun and observing the evolution of its induced magnetosphere throughout the comet's life-cycle, the Rosetta operations concluded at the end of September 2016 with a controlled impact on the cometary nucleus. At that time, the comet was located more than 3.7 AU from the Su…
Micro- and nanolander on the surface of Ryugu - Commonalities, differences and lessons learned for future microgravity exploration
Ulamec, Stephan; Ho, Tra-Mi; Lange, Caroline +2 more
Recent Space missions to the small bodies in our Solar System have shown an increasing importance of in-situ investigations. Philae, the comet lander of the ESA Rosetta mission performed the first landing on such a small body and its results clearly enhanced the overall scientific output of the Rosetta mission. While Philae was a rather heavy (~10…
Identifying primitive noble gas components in lunar ferroan anorthosites
Gilmour, J. D.; Joy, K. H.; Pernet-Fisher, J. F.
Lunar ferroan anorthosites are the ideal samples for investigating primitive volatile systematics. Not only are these lithologies thought to be direct crystallization products of the Lunar Magma Ocean (LMO), but many samples display short (T38 < 5 Myr) cosmic ray exposure (CRE) ages, minimizing the effects of cosmic ray spallation re…
A survey for occultation astrometry of main belt: expected astrometric performances
Tanga, P.; Machado, P.; Corsaro, E. +1 more
Context. Occultations of stars by asteroids are an efficient method to study the properties of minor bodies, and can be exploited as tools to derive very precise asteroid astrometry relative to the target star. With the availability of stellar astrometry thanks to the ESA mission Gaia, the frequency of good predictions and the quality of the astro…
The first photometric investigation of the contact binary OQ Cam
Guo, Ya-Ni; Li, Kai; Xia, Qi-Qi +3 more
The first charge-coupled device photometric light curves in B, V, Rc, and Ic bands of the short-period contact binary star OQ Cam are presented. Through analyzing the light curves with the Wilson-Devinney code, it is found that OQ Cam is a W-type shallow contact binary star with a contact degree of f = 20.2%. Based on the O -…
Herschel-PACS photometry of the five major moons of Uranus
Balog, Z.; Marton, G.; Müller, T. G. +3 more
Aims: We aim to determine far-infrared fluxes at 70, 100, and 160 µm for the five major Uranus satellites, Titania, Oberon, Umbriel, Ariel, and Miranda. Our study is based on the available calibration observations at wavelengths taken with the PACS photometer aboard the Herschel Space Observatory.
Methods: The bright image of Uranu…
Astrometric study of Gaia DR2 stars for interstellar communication
Seto, Naoki; Kashiyama, Kazumi
We discuss the prospects of high precision pointing of our transmitter to habitable planets around Galactic main sequence stars. For an efficient signal delivery, the future sky positions of the host stars should be appropriately extrapolated with accuracy better than the beam opening angle $\Theta$ of the transmitter. Using the latest data releas…
Properties of CVSO 30 from TESS measurements: probably a binary T Tauri star with complex light curves and no obvious planets
Koen, Chris
'Transiting Exoplanet Survey Satellite' (TESS) photometry of CVSO 30 spanned 21.8 d, with a single large gap of 1.1 d. This allows alias-free determination of the two periodicities in the data. It is confirmed that both of these are non-sinusoidal: the dominant P1 = 0.4990 d has two detectable harmonics and P2 = 0.4486 d has …
The horizontal branch morphology of the globular cluster NGC 1261 using AstroSat
Rao, N. Kameswara; Subramaniam, Annapurni; Rani, Sharmila +2 more
We present the results obtained from the UV photometry of the globular cluster NGC 1261 using far-UV (FUV) and near-UV (NUV) images acquired with the Ultraviolet Imaging Telescope (UVIT) on-board the AstroSat satellite. We utilized the UVIT data combined with HST, GAIA, and ground-based optical photometric data to construct the different UV colour…
Characterization of very wide companion candidates to young stars with planets and disks
Alcalá, J. M.; D'Orazi, V.; Frasca, A. +6 more
Discovering wide companions of stellar systems allows us to constrain the dynamical environment and age of the latter. We studied four probable wide companions of four different stellar systems. The candidates were selected mainly based on their similar kinematic properties to the central star using Gaia DR2. The central stars are V4046 Sgr, HIP 7…