Search Publications
X-ray characterisation of the massive galaxy cluster ClG J104803.7+313843 at z = 0.76 with XMM-Newton
Rossetti, M.; Bartalucci, I.; Molendi, S. +6 more
We present the characterisation of the massive cluster ClG J104803.7+313843 at z = 0.76 performed using a serendipitous XMM-Newton observation. High redshift and massive objects represent an ideal laboratory to benchmark our understanding of how clusters form and assembly formation is mainly driven by gravity. Leveraging the high throughput of XMM…
Characterising the orbit and circumstellar environment of the high-mass binary MWC 166 A
Mérand, Antoine; Monnier, John D.; Lanthermann, Cyprien +13 more
Context. Stellar evolution models are highly dependent on accurate mass estimates, especially for highly massive stars in the early stages of stellar evolution. The most direct method for obtaining model-independent stellar masses is derivation from the orbit of close binaries.
Aims: Our aim was to derive the first astrometric plus radial vel…
Plasma dynamics in the flaring loop observed by RHESSI
Kołomański, S.; Mrozek, T.; Falewicz, R. +1 more
Context. Hard X-rays (HXRs) contain the most direct information about the non-thermal electron population in solar flares. The approximation of the HXR emission mechanism (bremsstrahlung), known as the thick-target model, is well developed. It allows one to diagnose the physical conditions within a flaring structure. The thick-target model predict…
Connecting Solar Orbiter remote-sensing observations and Parker Solar Probe in situ measurements with a numerical MHD reconstruction of the Parker spiral
Telloni, Daniele; Susino, Roberto; Antonucci, Ester +21 more
As a key feature, NASA's Parker Solar Probe (PSP) and ESA-NASA's Solar Orbiter (SO) missions cooperate to trace solar wind and transients from their sources on the Sun to the inner interplanetary space. The goal of this work is to accurately reconstruct the interplanetary Parker spiral and the connection between coronal features observed remotely …
Companions to Kepler giant stars: A long-period eccentric sub-stellar companion to KIC 3526061 and a stellar companion to HD 187878
Cochran, William D.; Vítková, Michaela; Kabáth, Petr +12 more
Context. Our knowledge of populations and the occurrence of planets orbiting evolved intermediate-mass stars is still incomplete. In 2010 we started a planet search programme among 95 giant stars observed by the Kepler mission to increase the sample of giant stars with planets and with reliable estimates of stellar masses and radii.
Aims: We …
Gaia Early Data Release 3. Summary of the contents and survey properties
Prusti, T.; Mazeh, T.; Zucker, S. +423 more
Context. We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of radial velocities from Gaia DR2.
Aims: A summary of the contents of Gaia EDR3 is presented, accompanied by a discussion on the difference…
Gaia Early Data Release 3. The astrometric solution
Mora, A.; Esquej, P.; Jordan, S. +94 more
Context. Gaia Early Data Release 3 (Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3-21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational phase.
Aims: We describe the input data, the models, and the processing used for the astrometric con…
Gaia Early Data Release 3. Parallax bias versus magnitude, colour, and position
Biermann, M.; Klioner, S. A.; Lindegren, L. +14 more
Context. Gaia Early Data Release 3 (Gaia EDR3) gives trigonometric parallaxes for nearly 1.5 billion sources. Inspection of the EDR3 data for sources identified as quasars reveals that their parallaxes are biased, that is, they are systematically offset from the expected distribution around zero, by a few tens of microarcseconds.
Aims: We att…
The eROSITA X-ray telescope on SRG
Finoguenov, A.; Böhringer, H.; Haberl, F. +90 more
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the primary instrument on the Spectrum-Roentgen-Gamma (SRG) mission, which was successfully launched on July 13, 2019, from the Baikonour cosmodrome. After the commissioning of the instrument and a subsequent calibration and performance verification phase, eROSITA started a surv…
Gaia Early Data Release 3. Photometric content and validation
Gilmore, G.; Harrison, D. L.; Jordi, C. +39 more
Context. Gaia Early Data Release 3 (Gaia EDR3) contains astrometry and photometry results for about 1.8 billion sources based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational phase.
Aims: In this paper, we focus on the photometric content, describing the input data, the algori…