Search Publications
Planetary Sensor Models Interoperability Using the Community Sensor Model Specification
Hare, T.; Laura, J. R.; Mapel, J.
This paper presents the photogrammetric foundations upon which the Community Sensor Model specification depends, describes common coordinate system and reference frame transformations that support conversion between image sensor (charge-coupled device) coordinates to some arbitrary body coordinate, and describes the U.S. Geological Survey Astrogeo…
Electrical properties of cometary dust particles derived from line shapes of TOF-SIMS spectra measured by the ROSETTA/COSIMA instrument
Langevin, Yves; Fischer, Henning; Koch, Andreas +21 more
Between Aug. 2014 and Sept. 2016, while ESA's cornerstone mission Rosetta was operating in the vicinity of the nucleus and in the coma of comet 67P/Churyumov-Gerasimenko, the COSIMA instrument collected a large number of dust particles with diameters up to a millimeter. Positive or negative ions were detected by a time-of-flight secondary ion mass…
BV (RI)c photometric study of three variable PMS stars in the field of V733 Cephei
Ibryamov, Sunay; Semkov, Evgeni; Peneva, Stoyanka +1 more
This paper reports results from the first long-term BV (RI)c photometric CCD observations of three variable pre-main-sequence stars collected during the period from February 2007 to January 2020. The investigated stars are located in the field of the PMS star V733 Cep within the Cepheus OB3 association. All stars from our study show rap…
Development of Forecast Algorithm for Coronal Mass Ejection Speed and Arrival Time Based on Propagation Tracking by Interplanetary Scintillation g-Value
Jang, Soojeong; Park, Sa-Rah; Jeon, Ho-Cheol +4 more
We have developed an algorithm for tracking coronal mass ejection (CME) propagation that allows us to estimate CME speed and its arrival time at Earth. The algorithm may be used either to forecast the CME's arrival on the day of the forecast or to update the CME tracking information for the next day's forecast. In our case study, we successfully t…
Thermal Analysis of the Solar Orbiter PHI Electronics Unit
Piqueras, Javier; Rodriguez, Pedro; Torralbo, Ignacio +4 more
Decadal Variability Survey in MACSJ1149
Strolger, Louis-Gregory; Sarajedini, Vicki L.; Della Costa, John, III
We present a long temporal baseline variability survey in the Frontier Field MACSJ1149. In this study, we identify active galactic nuclei (AGNs) and other transient sources via their variability using over a decade of Hubble Space Telescope (HST) images for thousands of galaxies in the cluster region and detect significant variability in galaxies …
Eclipsing binaries in the era of Gaia
Holl, B.; Mowlavi, N.; Lecoeur-Taïbi, I. +3 more
The ESA mission Gaia is expected to detect a few million eclipsing binaries, most of them hitherto unknown. We present an outline of the processing of these objects in the Gaia Data Processing and Analysis Consortium pipeline, with an emphasis on the scientific validation of the software components.
Study of the Streamer Current Sheet with White-Light and UV Observations
Feng, Li; Li, Hui; Shi, Guang-lu +2 more
Current sheets (CSs) are the main region where magnetic reconnections can convert magnetic energy into plasma thermal and kinetic energies. We have studied a CS in the streamer occurred on 3 January 2003 by combining the White-Light (WL) images observed by the Large Angle and Spectrometric Coronagraph (LASCO) and the EUV spectra detected by the Ul…
Martian fan deposits: Insights on depositional processes and origin from mass balance survey
Hynek, Brian M.; Williams, Rebecca M. E.; Di Achille, Gaetano +2 more
Fan deposits located at the mouths of Martian valleys have been interpreted as indicators of wet conditions during Mars history. However, the processes, time and amount of water needed to carve the valleys and form the fans are still debated. Here we present a detailed morphometric and mass balance analysis of valleys and fan-shaped deposits using…
High-Velocity Moving Groups in the Solar Neighborhood in Gaia DR2
Baluev, R. V.; Shaidulin, V. Sh.; Veselova, A. V.
We use an improved wavelet analysis technique to reconstruct the (U,V,W) velocity distribution for ≈250 000 stars from Gaia DR2, located in the solar neighborhood of 200 pc. The 2D wavelet transforms for three bivariate distributions (U,V), (U,W), and (V,W) were investigated. Though most of currently known (low-velocity) stellar moving groups are …