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The MDOR/PDOR on-line module for MISO, the planning software of Solar Orbiter instruments
Susino, Roberto; Antonucci, Ester; Fineschi, Silvano +24 more
Solar Orbiter is a solar mission that will approach the Sun down to a minimum perihelion of 0.28 AU and will increase its orbit inclination with respect to the ecliptic up to a maximum angle of 34 deg. For imagers aboard Solar Orbiter there will be three 10-days remote sensing windows per orbit. Observations shall be carefully planned at least 6 m…
MACHO 311.37557.169: A VY Scl star
Brown, Michael J. I.; Schwope, Axel D.; Traulsen, Iris +1 more
Optical surveys, such as the MACHO project, often uncover variable stars whose classification requires follow‑up observations by other instruments. We performed X‑ray spectroscopy and photometry of the unusual variable star MACHO 311.37557.169 with XMM‑Newton in April 2018, supplemented by archival X‑ray and optical spectrographic data. The star h…
Landing site characterization for Tsiolkovskiy crater
Massironi, Matteo; Pozzobon, Riccardo; Tognon, Gloria
On the southern hemisphere of the lunar farside lies the interesting Tsiolkovskiy crater that presents on its floor one of the few exposures of mare volcanism on the far side and an unusually well-shaped central peak.Its morphology and the remotely-sensed detection of minerals such as olivine and Purest Anorthosite (PAN), make Tsiolkovskiy crater …
Editorial: Improving the Understanding of Kinetic Processes in Solar Wind and Magnetosphere: From CLUSTER to MMS
Perrone, Denise; Lavraud, Benoit; Chasapis, Alexandros +1 more
ARCHI: pipeline for light curve extraction of CHEOPS background stars
Guterman, P.; Hoyer, S.; Sousa, Sérgio G. +6 more
High precision time-series photometry from space is being used for a number of scientific cases. In this context, the recently launched CHaracterizing ExOPlanet Satellite (CHEOPS) (ESA) mission promises to bring 20 ppm precision over an exposure time of 6 h, when targeting nearby bright stars, having in mind the detailed characterization of exopla…
Evaluating `twin' parallaxes for binary stars
Jofré, P.; Samadi-Ghadim, A.
Employing Gaia DR2 stellar parallaxes, we tried to first evaluate how `twin parallaxes' are compared with Gaia parallaxes. In the meantime, we checked how different is the performance of twin/Gaia parallaxes for binary stars than for single stars. Our study on a sample of Gaia DR2-RAVE DR5 stars shows that for 70% of them, the twin parallaxes agre…
Results of Astrometric Observations of Distant Satellites of Jupiter with the New Telescope of the Caucasian Mountain Observatory, Sternberg Astronomical Institute, Moscow State University
Emelyanov, N. V.; Safonov, B. S.; Vozyakova, O. V. +1 more
Replenishment of the database of observations of distant satellites of planets is always useful, since the accuracy of the motion models and ephemeris depends not only on the accuracy of observations. Accuracy improves with increasing observation time. Therefore, observations made even with the same accuracy are in demand. Astrometric observations…
Photometry and spectroscopy of massive stars observed during K2 Campaign 8
Eidam, Jéssica M.; Andrade, Laerte; Emilio, Marcelo +4 more
We report in this paper spectroscopic and photometric analysis of eight massive stars observed during Campaign 8 of the Kepler/K2 mission from 2016 January to March. Spectroscopic data were obtained on these stars at OPD/LNA, Brazil, and their stellar parameters determined using SME. Periodic analyses of the light curves were performed through CLE…
Supersolar metallicity in G0-G3 main-sequence stars with V < 15. II. An extension of the sample
Bertone, E.; López-Valdivia, R.; Chávez, M. +1 more
We present the spectroscopic analysis at intermediate resolution of a new sample of 146 Sun-like stars (of spectral types G0-G3 and luminosity class V), which complements the data set of 233 targets previously investigated. Aimed at identifying objects with supersolar metallicity, we conducted observations at the Observatorio Astrofísico Guillermo…
The preliminary orbit of the new massive binary HD 93249
Gamen, R.; Barbá, R.; Morrell, N. I. +1 more
The OWN Survey is a high-resolution spectroscopic monitoring of Southern O and WN-type stars, whose multiplicity status is unknown. This project started more than ten years ago and it has discovered an important number of new binaries and other multiple systems. In this context, we present the first spectroscopic orbit of HD~93249, the brightest m…