Search Publications
New transient ULX candidate in NGC 4254: evidence of circumbinary disc?
Allak, Sinan
This paper presents the identification of a new transient ultraluminous X-ray source (ULX) candidate (ULX-3) with reaching a peak luminosity of ~4 × 1039 erg s-1 in NGC 4254 by using archival Chandra, Swift/X-Ray Telescope, Hubble Space Telescope, and JWST observations. From precise astrometric calculations, unique optical, n…
The Study of X-Ray Spectrum of Coma Galaxy Cluster
Pulatova, N.; Tugay, A.; Zadorozhna, L. +4 more
The X-ray spectrum of the Coma galaxy cluster was studied using the data from the XMM-Newton observatory. We combined 7 observations performed with the MOS camera of XMM-Newton in the 40' × 40' region centered at the Coma cluster. The analyzed observations were performed in 2000-2005 and have a total duration of 196ksec. We focus on the analysis o…
Exploring the environment, magnetic fields, and feedback effects of massive high-redshift galaxies with [C II]
Knudsen, K. K.; König, S.; Gullberg, B. +3 more
Context. Massive galaxies are expected to grow through different transformative evolutionary phases. High-redshift starburst galaxies and quasars are thought to be such phases and thus provide insight into galaxy evolution. Several physical mechanisms are predicted to play an important role in driving these phases; for example, interaction with co…
Influence of an Upstream Dynamic Pressure Pulse on Venus-Solar Wind Interaction by Multispecies Magnetohydrodynamic Simulation
Cao, Jinbin; Li, Yun; Xiong, Ruijing +4 more
As an unmagnetized planet, Venus does not have a global dipole magnetic field like Earth. The solar wind interacts directly with the Venusian ionosphere. In this paper, the interaction between solar wind and the Venusian upper atmosphere is investigated by conducting a three-dimensional multispecies magnetohydrodynamic (MHD) model, in which the Ve…
Study of a sample of faint Be stars in the exofield of CoRoT. III. Global spectroscopic characterization and astrophysical parameters of the central stars
Frémat, Y.; Zorec, J.; Hubert, A. M. +1 more
Context. The search and interpretation of non-radial pulsations from Be star light curves observed with the CoRoT satellite requires high-quality stellar astrophysical parameters.
Aims: The present work is devoted to the spectroscopic study of a sample of faint Be stars observed by CoRoT in the fourth long run (LRA02).
Methods: The astro…
Characterising the interior of five inner Saturnian moons using Cassini ISS data
Lainey, V.; Rambaux, N.; Zhang, Q. +2 more
Context. The Cassini-Huygens space mission provided a huge amount of data for the Saturnian system. While the mission ended in September 2017, there is still much information to be retrieved from the data.
Aims: Here, from their orbital motion, we infer the interior of the five inner Saturnian moons, Atlas, Prometheus, Pandora, Janus, and Epi…
A statistical analysis of the structure of the interstellar medium in the disc of the Milky Way
Whitworth, A. P.; Bates, M. L.
We construct Convolutional Neural Networks (CNNs) trained on exponentiated fractional Brownian motion (xfBm) images, and use these CNNs to analyse Hi-GAL images of surface density in the Galactic Plane. The CNNs estimate the Hurst parameter, ${\cal H}$ (a measure of the power spectrum), and the scaling exponent, ${\cal S}$ (a measure of the range …
Debris rings from extrasolar irregular satellites
Hansen, Bradley M. S.; Hayakawa, Kevin T.
Irregular satellites are the minor bodies found orbiting all four Solar system giant planets, with large semimajor axes, eccentricities, and inclinations. Previous studies have determined that the Solar system's irregular satellites are extremely collisionally evolved populations today, having lost ~99 per cent of their initial mass over the cours…
L 363-38 b: A planet newly discovered with ESPRESSO orbiting a nearby M dwarf star
Sartori, Lia F.; Lendl, Monika; Cugno, Gabriele +7 more
Context. Planets around stars in the solar neighbourhood will be prime targets for characterisation with upcoming large space- and ground-based facilities. Since large-scale exoplanet searches will not be feasible with such telescopes, it is crucial to use currently available data and instruments to find possible target planets before next-generat…
VISIONS: the VISTA Star Formation Atlas. II. The data processing pipeline
Meingast, Stefan; Rottensteiner, Alena; Bouy, Hervé +3 more
The VISIONS public survey provides large-scale, multi-epoch imaging of five nearby star-forming regions at sub-arcsecond resolution in the near-infrared. All data collected within the program and provided by the European Southern Observatory (ESO) science archive are processed with a custom end-to-end pipeline infrastructure to provide science-rea…