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Snow precipitation on Mars driven by cloud-induced night-time convection
Montmessin, Franck; Hinson, David P.; Forget, François +4 more
Although it contains less water vapour than Earth's atmosphere, the Martian atmosphere hosts clouds. These clouds, composed of water-ice particles, influence the global transport of water vapour and the seasonal variations of ice deposits. However, the influence of water-ice clouds on local weather is unclear: it is thought that Martian clouds are…
Astrophysical properties of star clusters in the Magellanic Clouds homogeneously estimated by ASteCA
Perren, G. I.; Vázquez, R. A.; Piatti, A. E.
Aims: We seek to produce a homogeneous catalog of astrophysical parameters of 239 resolved star clusters, located in the Small and Large Magellanic Clouds, observed in the Washington photometric system.
Methods: The cluster sample was processed with the recently introduced Automated Stellar Cluster Analysis (ASteCA) package, which ensure…
KIC 4150611: a rare multi-eclipsing quintuple with a hybrid pulsator
Kambe, E.; Maehara, H.; Hełminiak, K. G. +5 more
Aims: We aim to analyse KIC 4150611 (HD 181469) - an interesting, bright quintuple system that includes a hybrid δ Sct/γ Dor pulsator. Four periods of eclipses - 94.2, 8.65, 1.52 and 1.43 d - have been observed by the Kepler satellite, and three point sources (A, B, and C) are seen in high angular resolution images.
Methods: From spectro…
The 999th Swift gamma-ray burst: Some like it thermal. A multiwavelength study of GRB 151027A
Prandoni, I.; Covino, S.; D'Avanzo, P. +23 more
We present a multiwavelength study of GRB 151027A. This is the 999th gamma-ray burst detected by the Swift satellite and it has a densely sampled emission in the X-ray and optical band and has been observed and detected in the radio up to 140 days after the prompt. The multiwavelength light curve from 500 s to 140 days can be modelled through a st…
What planetary nebulae can tell us about jets in core collapse supernovae
Soker, Noam; Bear, Ealeal
We compare the morphology of the core collapse supernova remnant (CCSNR) W49B with the morphology of many planetary nebulae (PNe), and deduce the orientation of the jets that shaped this CCSNR and estimate their energy. We find morphological features that are shared by some PNe and by the CCSNR W49B. In PNe these features, such as a barrel-shaped …
VALES. II. The physical conditions of interstellar gas in normal star-forming galaxies up to z = 0.2 revealed by ALMA
Ivison, R. J.; van Kampen, E.; Cooray, A. +18 more
We use new Band 3 CO(1-0) observations taken with the Atacama Large Millimeter/submillimeter Array (ALMA) to study the physical conditions in the interstellar gas of a sample of 27 dusty main-sequence star-forming galaxies at 0.03 < z < 0.2 present in the Valparaíso ALMA Line Emission Survey (VALES). The sample is drawn from far-IR bright ga…
New Evidence for Charge-sign-dependent Modulation During the Solar Minimum of 2006 to 2009
Potgieter, M. S.; Vos, E. E.; Munini, R. +1 more
The PAMELA space experiment, in orbit since 2006, has measured cosmic rays (CRs) through the most recent period of minimum solar activity with the magnetic field polarity as A < 0. During this entire time, galactic electrons and protons have been detected down to 70 MV and 400 MV, respectively, and their differential variation in intensity with…
Microlensing Constraints on the Mass of Single Stars from HST Astrometric Measurements
Udalski, A.; Rejkuba, M.; Anderson, J. +13 more
We report on the first results from a large-scale observing campaign aiming to use astrometric microlensing to detect and place limits on the mass of single objects, including stellar remnants. We used the Hubble Space Telescope to monitor stars near the Galactic Center for three years, and we measured the brightness and positions of ∼2 million st…
The dust environment of comet 67P/Churyumov-Gerasimenko: results from Monte Carlo dust tail modelling applied to a large ground-based observation data set
Della Corte, Vincenzo; Lara, Luisa M.; Moreno, Fernando +6 more
We present an extensive data set of ground-based observations and models of the dust environment of comet 67P/Churyumov-Gerasimenko covering a large portion of the orbital arc from about 4.5 au pre-perihelion through 3.0 au post-perihelion, acquired during the current orbit. In addition, we have also applied the model to a dust trail image acquire…
Solar Energetic Particle Events with Protons Above 500 MeV Between 1995 and 2015 Measured with SOHO/EPHIN
Dresing, N.; Heber, B.; Kühl, P. +1 more
The Sun is an effective particle accelerator that produces solar energetic particle (SEP) events, during which particles of up to several GeVs can be observed. These events, when they are observed at Earth with the neutron monitor network, are called ground-level enhancements (GLEs). Although these events with their high-energy component have been…