Search Publications
Missions
Journals
Publication Years
BepiColombo Ground Segment and Mission Operations
Murakami, G.; Martinez, S.; Budnik, F. +7 more
The ESA/JAXA BepiColombo mission to Mercury was launched in October 2018. It includes two scientific Mercury orbiters, flying as a single stack during the seven years interplanetary transfer, and as individual spacecraft operated by their respective space Agencies ESA and JAXA once deployed in their respective scientific orbit around Mercury. Thre…
On the Variation of Intermittency of Fast and Slow Solar Wind With Radial Distance, Heliospheric Latitude, and Solar Cycle
Wawrzaszek, Anna; Echim, Marius
Intermittency, an important property of astrophysical plasma turbulence, is studied extensively during last decades fromin-situmeasurements of the solar wind plasma and magnetic field in the ecliptic plane and at higher latitudes, and heliocentric distances between 0.3 and 5 Astronomical Units. In this paper, we review the main findings on intermi…
Linearized Field Deblending: Point-spread Function Photometry for Impatient Astronomers
Luger, Rodrigo; Hedges, Christina; Barentsen, Geert +2 more
NASA's Kepler, K2, and TESS missions employ simple aperture photometry to derive time-series photometry, where an aperture is estimated for each star, and pixels containing each star are summed to create a single light curve. This method is simple, but in crowded fields, the derived time series can be highly contaminated. The alternate method of f…
Space observations of AA Doradus provide consistent mass determinations. New HW-Vir systems observed with TESS
Heber, U.; Irrgang, A.; Reed, M. D. +5 more
We present an overview of eclipsing systems of the HW-Virginis (HW-Vir) type, based on space observations from the Transiting Exoplanet Survey Satellite (TESS) mission. We perform a detailed analysis of the properties of AA Doradus (AA Dor), which was monitored for almost a full year. This excellent time series data set permitted us to search for …
Rieger-type periodicity in the total irradiance of the Sun as a star during solar cycles 23-24
Reiners, A.; Lanza, A. F.; Oliver, R. +4 more
Context. Total solar irradiance allows for the use of the Sun as a star for studying observations of stellar light curves from recent space missions.
Aims: We aim to study how the mid-range periodicity observed in solar activity indices influences the total solar irradiance.
Methods: We studied periodic variations of total solar irradian…
New Positions of Triton Based on Gaia DR2 and New Image-processing Methods
Zhang, H. Y.; Yan, D.; Qiao, R. C. +2 more
The large time span and precise observational data of natural satellites is of great significance for updating their ephemerides and studying their dynamic characteristics. With the help of the new image-processing methods and the Gaia DR2 catalog, all CCD images of Triton taken with the 1.56 m telescope of Shanghai Astronomical Observatory during…
Broadband X-ray spectra and timing of the accreting millisecond pulsar Swift J1756.9-2508 during its 2018 and 2019 outbursts
Huang, Y.; Tsygankov, S. S.; Bozzo, E. +8 more
The accreting millisecond X-ray pulsar Swift J1756.9-2508 launched into an outburst in April 2018 and June 2019 - 8.7 years after the previous period of activity. We investigated the temporal, timing, and spectral properties of these two outbursts using data from NICER, XMM-Newton, NuSTAR, INTEGRAL, Swift, and Insight-HXMT. The two outbursts exhib…
Effect of orbital trapping by bar resonances in the local U-V velocity field
Fernández-Trincado, José G.; Moreno, Edmundo; Chaves-Velasquez, Leonardo +2 more
The effects in the local U-V velocity field due to orbital trapping by bar resonances have been studied computing 15 resonant families in a non-axisymmetric Galactic potential, considering the bar's angular velocity between 35 and 57.5 ${\rm \, km\, s^{-1}{kpc}^{-1}}$. Only cases in the low, 37.5, 40 ${\rm \, km\, s^{-1}{kpc}^{-1}}$, and high, 55,…
A universal relationship between stellar masses and binding energies of galaxies
Chen, Yanmei; Mao, Shude; Shi, Yong +3 more
In this study, we demonstrate that stellar masses of galaxies (Mstar) are universally correlated through a double power-law function with the product of the dynamical velocities (Ve) and sizes to one-fourth power ($R_{\rm e}^{0.25}$) of galaxies, both measured at the effective radii. The product $V_{\rm e}R_{\rm e}^{0.25}$ re…
Miec: A Bayesian hierarchical model for the analysis of nearby young open clusters
Miret-Roig, N.; Bouy, H.; Sarro, L. M. +4 more
Context. The analysis of luminosity and mass distributions of young stellar clusters is essential to understanding the star-formation process. However, the gas and dust left over by this process extinct the light of the newborn stars and can severely bias both the census of cluster members and itsss luminosity distribution.
Aims: We aim to de…