Search Publications
Preparing for Gaia searches for optical counterparts of gravitational wave events during O4
Jonker, Peter G.; van Leeuwen, M.; Hodgkin, Simon +9 more
The discovery of gravitational wave (GW) events and the detection of electromagnetic counterparts from GW170817 has started the era of multimessenger GW astronomy. The field has been developing rapidly, and in this paper, we discuss the preparation for detecting these events with ESA's Gaia satellite, during the 4th observing run of the LIGO-Virgo…
The road to on-board crew autonomy: Using ISS' Columbus module as the basis for ground procedure automation
Hartmann, Carsten; Speth, Franca; Sabath, Dieter +1 more
Future human exploration missions require new concepts of operations since the international roadmap foresees stations with uncrewed periods (e.g. Lunar Gateway) and deep space missions with communication delays making real-time monitoring and control impossible (e.g. any vehicle on its way to or in orbit of Mars). As part of the commitment to ach…
Magnetic connectivity and solar energetic proton event intensity profiles at deka-MeV energy
Paassilta, Miikka; Raukunen, Osku; Vainio, Rami +3 more
We present an analysis of the time-intensity profiles of 25 solar energetic proton events at 18.2 MeV, modelled by fitting an analytical function form (a modified Weibull function) to the observed intensities. Additionally relying on previous work that characterized the magnetic connectivity between the event-related solar flare and the observer i…
Reconstructing the cruise-phase trajectory of deep-space probes in a general relativistic framework: An application to the Cassini gravitational wave experiment
Barriot, Jean-Pierre; O'Leary, Joseph
Einstein's theory of general relativity is playing an increasingly important role in fields such as interplanetary navigation, astrometry, and metrology. Modern spacecraft and interplanetary probe prediction and estimation platforms employ a perturbed Newtonian framework, supplemented with the Einstein-Infeld-Hoffmann n-body equations of motion. W…
New atomic data for C I Rydberg states compared with solar UV spectra
Del Zanna, G.; Storey, P. J.; Dufresne, R. P.
We use the Breit-Pauli R-matrix method to calculate accurate energies and radiative data for states in C I up to n = 30 and with l ≤ 3. We provide the full data set of decays to the five 2s2 2p2 ground configuration states 3P0,1,2, 1D2, and 1S0. This is the fir…
The Influence of Oxygen Ions on the Formation of a Thin Current Sheet in the Magnetotail
Malova, H. V.; Popov, V. Yu.; Zelenyi, L. M. +2 more
A thin current sheet in the Earth's magnetotail with characteristic thickness of one to several proton gyroradii is often observed during magnetospheric disturbances named substorms, when a relatively thick current configuration in the magnetotail is narrowed to an extremely small thickness and then can spontaneously be destroyed. The current-shee…
Sub-Auroral Flows and Associated Magnetospheric and Ionospheric Phenomena Developed During 7-8 September 2017
Horvath, Ildiko; Lovell, Brian C.
This study investigates the Sub-Auroral Polarization Streams (SAPS) and Sub-Auroral Ion Drifts (SAID) along with the associated magnetospheric and ionospheric phenomena developed during 7-8 September 2017. Then, a series of substorms occurred before and during the geomagnetic storm (SYM-Hmin = -146 nT). Results are obtained by utilizing…
The Pleiades flare stars in the Gaia era
Ghazaryan, S.; Hambaryan, V.; Hambardzumyan, L. +3 more
We study the six-dimensional arrangement of flare stars in the Pleiades cluster region using the third release of the Gaia–mission (Gaia DR3) and we provide preliminary, a new, original view of the spatial configuration of the flare "star-members" of the cluster.
Generating a unified catalogue of open clusters and their most probable members
Perren, G. I.; Pera, M. S.; Navone, H. D. +1 more
In this work we present the largest database of open clusters catalogued to date. To obtain it we combine almost a dozen existing databases of open clusters to generate a cross-matched list of more than 5000 unique objects, scattered throughout the Galaxy. In addition, we process around 2000 of these clusters with a new membership algorithm code; …
Chemical characterisation of the X-shooter Spectral Library (XSL): [Mg/Fe] and [Ca/Fe] abundances
Palicio, P. A.; Vazdekis, A.; Sánchez-Blázquez, P. +1 more
Context. The X-shooter Spectral Library (XSL) is a large empirical stellar library used as a benchmark for the development of stellar population models. The inclusion of α-element abundances is crucial to disentangling the chemical evolution of any stellar system.
Aims: The aim of this paper is to provide a catalogue of high-precision, accura…