Search Publications
SOPHIE velocimetry of Kepler transit candidates. XIX. The transiting temperate giant planet KOI-3680b
Bouchy, F.; Deleuil, M.; Moutou, C. +15 more
Whereas thousands of transiting giant exoplanets are known today, only a few are well characterized with long orbital periods. Here we present KOI-3680b, a new planet in this category. First identified by the Kepler team as a promising candidate from the photometry of the Kepler spacecraft, we establish here its planetary nature from the radial ve…
Quincuncial adaptive closed Kohonen (QuACK) map for the irregularly shaped comet 67P/Churyumov-Gerasimenko
Grieger, B.
Context. Standard global map projections cannot display the complete surface of a highly irregular body such as the Rosetta target comet 67P/Churyumov-Gerasimenko because different points on the surface can have the same longitude and latitude.
Aims: We present a concept of generalized longitudes and latitudes that allows us to display the co…
Electron acceleration at comet 67P/Churyumov-Gerasimenko
Nilsson, H.; Eriksson, A.; Goldstein, R. +6 more
We report the observation by the Ion and Electron Sensor (IES) of energetic (>1 keV) electrons in the plasma environment of comet 67P Churyumov-Gerasimenko (67P). Most of the electrons in the cometary coma are expected to be of solar wind, photoionization, or electron impact origin and are therefore not expected to exceed some hundreds of eV in…
CIELO-RGS: a catalog of soft X-ray ionized emission lines
Grinberg, Victoria; Kretschmar, Peter; Guainazzi, Matteo +9 more
Context. High-resolution X-ray spectroscopy has advanced our understanding of the hot Universe by revealing physical properties like kinematics, temperature, and abundances of the astrophysical plasmas. Despite technical and scientific achievements, the lack of scientific products at a level higher than count spectra is hampering complete scientif…
Thermal X-ray emission identified from the millisecond pulsar PSR J1909-3744
Guillemot, L.; Webb, N. A.; Barret, D. +5 more
Context. Pulsating thermal X-ray emission from millisecond pulsars can be used to obtain constraints on the neutron star equation of state, but to date only five such sources have been identified. Of these five millisecond pulsars, only two have well-constrained neutron star masses, which improve the determination of the radius via modelling of th…
J-PLUS: Discovery and characterisation of ultracool dwarfs using Virtual Observatory tools
Hernández-Monteagudo, C.; Caballero, J. A.; Martín, E. L. +23 more
Context. Ultracool dwarfs are objects with spectral types equal to or later than M7. Most of them have been discovered using wide-field imaging surveys. The Virtual Observatory has proven to be very useful for efficiently exploiting these astronomical resources.
Aims: We aim to validate a Virtual Observatory methodology designed to discover a…
Analysis of the origin of water, carbon monoxide, and carbon dioxide in the Uranus atmosphere
Lampón, M.; Lara, L. M.; Rodrigo, R. +1 more
Context. We present here an analysis of the potential sources of oxygen species in the Uranus atmosphere.
Aims: Our aim is to explain the current measurements of H2O, CO, and CO2 in the Uranus atmosphere, which would allow us to constrain the influx of oxygen-bearing species and its origin in this planet.
Methods: W…
Generation of photoclinometric DTMs for application to transient changes on the surface of comet 67P/Churyumov-Gerasimenko
Vincent, J. -B.; Hayes, A. G.; Tang, Y. +4 more
Context. The wide spatial and temporal coverage of 67P/Churyumov-Gerasimenko (67P) by the Rosetta mission has revealed a surface created by scattered large-scale changes and numerous small-scale changes. The many small-scale changes are of particular interest because they are unexpected and ubiquitous. As their topographic relief is often smaller …
Chemical composition of the outer halo globular cluster Palomar 15
Rich, R. Michael; Xu, Siyi; Koch, Andreas
Globular clusters (GCs) in the outer Milky Way halo are important tracers of the assembly history of our Galaxy. Only a few of these objects show spreads in heavier elements beyond the canonical light-element variations that have essentially been found throughout the entire Galactic GC system, suggesting a more complex origin and evolution of thes…
The HST Key Project galaxies NGC 1326A, NGC 1425, and NGC 4548: New variable stars and massive star population
Hatzidimitriou, D.; Bonanos, A. Z.; Yang, M. +2 more
Studies of the massive star population in galaxies beyond the Local Group are the key to understanding the link between their numbers and modes of star formation in different environments. We present the analysis of the massive star population of the galaxies NGC 1326A, NGC 1425, and NGC 4548 using archival images obtained with the Hubble Space Te…