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eROSITA calibration and performance verification phase: High-mass X-ray binaries in the Magellanic Clouds
Haberl, F.; Udalski, A.; Freyberg, M. J. +8 more
Context. During its performance verification phase, the soft X-ray instrument eROSITA on board the Spektrum-Roentgen-Gamma (SRG) spacecraft observed large regions in the Magellanic Clouds in which almost 40 known high-mass X-ray binaries (HMXBs, including candidates) are located.
Aims: We looked for new HMXBs in the eROSITA data, searched for…
The origin of early-type runaway stars from open clusters
Heber, U.; Irrgang, A.; Bhat, A.
Runaway stars are ejected from their place of birth in the Galactic disk, with some young B-type runaways found several tens of kiloparsecs from the plane traveling at speeds beyond the escape velocity, which calls for violent ejection processes. Young open clusters are a likely place of origin, and ejection may be either through N-body interactio…
A Temperature Trend for Clouds and Hazes in Exoplanet Atmospheres
Swain, Mark R.; Estrela, Raissa; Roudier, Gael M.
The transmission spectra of exoplanet atmospheres observed with the Hubble Space Telescope (HST) in the near-infrared range (1.1-1.65 µm) frequently show evidence for some combination of clouds and hazes. Identification of systematic trends in exoplanet clouds and hazes is potentially important for understanding atmospheric composition and t…
Thermal Properties of 1847 WISE-observed Asteroids
Masiero, Joseph R.; Tholen, David J.; Hung, Denise +1 more
We present new thermophysical model fits of 1847 asteroids, deriving thermal inertia, diameter, and Bond and visible geometric albedo. We use thermal flux measurements obtained by the Wide-field Infrared Survey Explorer (WISE) during its fully cryogenic phase, when both the 12 µm (W3) and 22 µm (W4) bands were available. We take shape …
Modelling the secular evolution of protoplanetary disc dust sizes - a comparison between the viscous and magnetic wind case
Tabone, Benoît; Zagaria, Francesco; Rosotti, Giovanni P. +1 more
For many years, protoplanetary discs have been thought to evolve viscously: angular momentum redistribution leads to accretion and outward disc spreading. Recently, the hypothesis that accretion is due, instead, to angular momentum removal by magnetic winds gained new popularity: no disc spreading is expected in this case. In this paper, we run se…
The Magnetic Field in the Milky Way Filamentary Bone G47
Jackson, James M.; Sanhueza, Patricio; Guzmán, Andrés +21 more
Star formation primarily occurs in filaments where magnetic fields are expected to be dynamically important. The largest and densest filaments trace the spiral structure within galaxies. Over a dozen of these dense (~104 cm-3) and long (>10 pc) filaments have been found within the Milky Way, and they are often referred to …
Massive Multi-Mission Statistical Study and Analytical Modeling of the Earth's Magnetopause: 1. A Gradient Boosting Based Automatic Detection of Near-Earth Regions
Lavraud, B.; Jeandet, A.; Aunai, N. +3 more
We present an automatic classification method of the three near-Earth regions, the magnetosphere, the magnetosheath and the solar wind from their in situ data measurement by multiple spacecraft. Based on gradient boosting classifier, this very simple and very fast method outperforms the detection routines based on manually set thresholds. The meth…
Martian Dust Storms and Gravity Waves: Disentangling Water Transport to the Upper Atmosphere
Medvedev, Alexander S.; Yiǧit, Erdal; Hartogh, Paul +2 more
Simulations with the Max Planck Institute Martian general circulation model for Martian years 28 and 34 reveal details of the water "pump" mechanism and the role of gravity wave (GW) forcing. Water is advected to the upper atmosphere mainly by upward branches of the meridional circulation: in low latitudes during equinoxes and over the south pole …
Magnetic cloud prediction model for forecasting space weather relevant properties of Earth-directed coronal mass ejections
Nandy, Dibyendu; Pal, Sanchita; Kilpua, Emilia K. J.
Context. Coronal mass ejections (CMEs) are major eruptive events on the Sun that result in the ejection of large-scale magnetic clouds (MCs) in interplanetary space, consisting of plasma with enhanced magnetic fields whose direction changes coherently when measured in situ. The severity of CME-induced geomagnetic perturbations and space weather im…
Revisiting the evolved hypergiants in the Magellanic Clouds
Borges Fernandes, M.; Kraus, M.; Maravelias, G. +2 more
The massive stars that survive the phase of red supergiants (RSGs) spend the rest of their life in extremity. Their unstable atmospheres facilitate the formation and episodic ejection of shells that alter the stellar appearance and surroundings. In the present study, we revise the evolutionary state of eight hypergiants in the Magellanic Clouds, f…