Search Publications
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…
The case for a high-redshift origin of GRB 100205A
Cenko, S. B.; Lyman, J. D.; Berger, E. +15 more
The number of long gamma-ray bursts (GRBs) known to have occurred in the distant Universe (z > 5) is small (∼15); however, these events provide a powerful way of probing star formation at the onset of galaxy evolution. In this paper, we present the case for GRB 100205A being a largely overlooked high-redshift event. While initially noted as a h…
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…
Ultraviolet Mg II emission from fast neutral ejecta around Eta Carinae
Smith, Nathan; Morse, Jon A.
We present the first images of the nebula around η Carinae obtained with the Wide Field Camera 3 (WFC3) onboard the Hubble Space Telescope (HST), including an ultraviolet (UV) image in the F280N filter that traces Mg II emission, plus contemporaneous imaging in the F336W, F658N, and F126N filters that trace near-UV continuum, [N II], and [Fe II], …
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…
A Hot Saturn Near (but Unassociated with) the Open Cluster NGC 1817
Vanderburg, Andrew; Rampalli, Rayna; Bieryla, Allyson +14 more
We report on the discovery of a hot Saturn-sized planet (9.916 ± 0.985 R ⊕) around a late F-star, K2-308, observed in Campaign 13 of the K2 mission. We began studying this planet candidate because prior to the release of Gaia DR2, the host star was thought to have been a member (≥slant 90 % membership probability) of the ≈ 1 {Gyr} open …
The BepiColombo Laser Altimeter (BELA): a post-launch summary
Thomas, Nicolas; Hussmann, Hauke; Lara, Luisa M.
We provide a brief description of the BepiColombo Laser Altimeter experiment for the joint ESA-JAXA mission to Mercury, BepiColombo. The text describes the main elements of the instrument and discusses several of the problems encountered during the instrument development. The actions taken to mitigate the issues are also described and the resultin…
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 layering-related linear features on comet 67P/Churyumov-Gerasimenko
Penasa, Luca; Boehnhardt, Hermann; Remetean, Emile +4 more
We analysed layering-related linear features on the surface of comet 67P/Churyumov-Gerasimenko (67P) to determine the internal configuration of the layerings within the nucleus. We used high-resolution images from the OSIRIS Narrow Angle Camera onboard the Rosetta spacecraft, projected on to the SHAP7 shape model of the nucleus, to map 171 layerin…