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ExoMars 2016: Schiaparelli coasting, entry and descent post flight mission analysis
Bonetti, Davide; De Zaiacomo, Gabriele; Blanco, Gonzalo +4 more
The ExoMars programme is pursued as part of a broad cooperation between ESA and Roscosmos with significant contribution from NASA. Two missions compose the ExoMars programme with launches in 2016 and 2020. The ExoMars 2016 mission, led by ESA, has been launched by the Russian Proton on March 14th, 2016. The mission includes the Trace Gas Orbiter (…
In-flight verification of the calibration and performance of the ASTRO-H (Hitomi) Soft X-ray Spectrometer
Maeda, Yoshitomo; Ishida, Manabu; Petre, Robert +43 more
The Soft X-ray Spectrometer onboard the Astro-H (Hitomi) orbiting x-ray observatory featured an array of 36 silicon thermistor x-ray calorimeters optimized to perform high spectral resolution x-ray imaging spectroscopy of astrophysical sources in the 0.3- to 12-keV band. Extensive preflight calibration measurements are the basis for our modeling o…
New nearby white dwarfs from Gaia DR1 TGAS and UCAC5/URAT
Jahreiß, H.; Meusinger, H.; Scholz, R. -D.
Aims: Using an accurate Tycho-Gaia Astrometric Solution (TGAS) 25 pc sample that is nearly complete for GK stars and selecting common proper motion (CPM) candidates from the 5th United States Naval Observatory CCD Astrograph Catalog (UCAC5), we search for new white dwarf (WD) companions around nearby stars with relatively small proper motions…
Revised coordinates of variable stars in Cassiopeia
Nesci, R.
The identification of the variable stars published on IBVS 3573 has ben revised on the basis of the original (unpublished) finding charts. Cross check with the 2MASS catalog has been made to get more accurate coordinates and to confirm their nature from their , colors. The Mira stars, given their known periods, could be used with the astrometric p…
Deconvolving the HD 81809 Binary: Rotational and Activity Evidence for a Subgiant with a Sun-like Cycle
Egeland, Ricky
HD 81809 has one of the highest quality activity cycles from the sample of stars synoptically observed in the Mount Wilson Observatory HK Project. However, this object is in fact a binary system, raising the question as to which of the components is responsible for the observed cyclic activity and what are the properties of that active component. …
Mars radar clutter and surface roughness characteristics from MARSIS data
Schroeder, Dustin M.; Whitten, Jennifer L.; Campbell, Bruce A.
Radar sounder studies of icy, sedimentary, and volcanic settings can be affected by reflections from surface topography surrounding the sensor nadir location. These off-nadir ;clutter; returns appear at similar time delays to subsurface echoes and complicate geologic interpretation. Additionally, broadening of the radar echo in delay by surface re…
Stormy Weather in 3C 196.1: Nuclear Outbursts and Merger Events Shape the Environment of the Hybrid Radio Galaxy 3C 196.1
Lovisari, L.; Forman, W. R.; Liuzzo, E. +8 more
We present a multiwavelength analysis based on archival radio, optical, and X-ray data of the complex radio source 3C 196.1, whose host is the brightest cluster galaxy of a z = 0.198 cluster. HST data show Hα+[N II] emission aligned with the jet 8.4 GHz radio emission. An Hα+[N II] filament coincides with the brightest X-ray emission, the northern…
Is the Cometary Nucleus-extraction Technique Reliable?
Li, Jian-Yang; Hui, Man-To
We investigated the reliability of the cometary nucleus-extraction technique, and found the answer to this question: it depends. Our experiment reveals that, given an optically thin coma, generally, the smaller the signal ratio of nucleus to coma, the less reliable the cometary nucleus-extraction technique is. We strongly suggest the technique onl…
Catching Galactic open clusters in advanced stages of dynamical evolution
Maia, F. F. S.; Angelo, M. S.; Dias, W. S. +1 more
During their dynamical evolution, Galactic open clusters (OCs) gradually lose their stellar content mainly because of internal relaxation and tidal forces. In this context, the study of dynamically evolved OCs is necessary to properly understand such processes. We present a comprehensive Washington CT1 photometric analysis of six sparse…
Mass Composition of the Escaping Flux at Mars: MEX Observations
Nilsson, H.; Rojas-Castillo, D.; Stenberg Wieser, G.
Using more than 7 years of ion measurements from the ASPERA-3/IMA instrument onboard the Mars Express mission, we analyze the mass composition of the two main outflowing heavy ion species O2+ and O+. Using an improved multispecies fitting technique, we discriminate the molecular from atomic oxygen ion population. W…