Search Publications
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…
CHEOPS finds KELT-1b darker than expected in visible light. Discrepancy between the CHEOPS and TESS eclipse depths
Guterman, P.; Alonso, R.; Deleuil, M. +78 more
Recent studies based on photometry from the Transiting Exoplanet Survey Satellite (TESS) have suggested that the dayside of KELT-1b, a strongly irradiated brown dwarf, is significantly brighter in visible light than what would be expected based on Spitzer observations in the infrared. We observed eight eclipses of KELT-1b with CHaracterising ExOPl…
The SN Ia runaway LP 398-9: detection of circumstellar material and surface rotation
Hermes, J. J.; Blouin, Simon; Zakamska, Nadia L. +12 more
A promising progenitor scenario for Type Ia supernovae (SNeIa) is the thermonuclear detonation of a white dwarf in a close binary system with another white dwarf. After the primary star explodes, the surviving donor can be spontaneously released as a hypervelocity runaway. One such runaway donor candidate is LP 398-9, whose orbital trajectory trac…
The (Black Hole Mass)-(Spheroid Stellar Density) Relations: M BH-µ (and M BH-Σ) and M BH-ρ
Graham, Alister W.; Davis, Benjamin L.; Sahu, Nandini
This paper is the fourth in a series presenting (galaxy morphology, and thus galaxy formation)-dependent black hole (BH) mass, M BH, scaling relations. We have used a sample of 119 galaxies with directly measured M BH and host spheroid parameters obtained from multicomponent decomposition of, primarily, 3.6 µm Spitzer i…