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A sedimentary origin for intercrater plains north of the Hellas basin: Implications for climate conditions and erosion rates on early Mars
Mangold, Nicolas; Ori, Gian Gabriele; Salese, Francesco +4 more
Understanding the origin (volcanic or sedimentary) and timing of intercrater plains is crucial for deciphering the geological evolution of Mars. We have produced a detailed geological map of the intercrater plains north of the Hellas basin, based on images from the Mars Express High-Resolution Stereo Camera, the Mars Reconnaissance High-Resolution…
The panchromatic spectroscopic evolution of the classical CO nova V339 Delphini (Nova Del 2013) until X-ray turnoff
Buil, C.; Scaringi, S.; Shore, S. N. +10 more
Context. Classical novae are the product of thermonuclear runaway-initiated explosions occurring on accreting white dwarfs.
Aims: V339 Del (Nova Delphinus 2013) was one of the brightest classical novae of the last hundred years. Spectroscopy and photometry are available from γ-rays through infrared at stages that have frequently not been obse…
Ion Acceleration at the Quasi-parallel Bow Shock: Decoding the Signature of Injection
Burgess, D.; Sundberg, Torbjörn; Haynes, Christopher T. +1 more
Collisionless shocks are efficient particle accelerators. At Earth, ions with energies exceeding 100 keV are seen upstream of the bow shock when the magnetic geometry is quasi-parallel, and large-scale supernova remnant shocks can accelerate ions into cosmic-ray energies. This energization is attributed to diffusive shock acceleration however, for…
The impact of the SZ effect on cm-wavelength (1-30 GHz) observations of galaxy cluster radio relics
Vazza, Franco; Basu, Kaustuv; Erler, Jens +1 more
Radio relics in galaxy clusters are believed to be associated with powerful shock fronts that originate during cluster mergers, and are a testbed for the acceleration of relativistic particles in the intracluster medium. Recently, radio relic observations have pushed into the cm-wavelength domain (1-30 GHz) where a break from the standard synchrot…
Gliese 710 will pass the Sun even closer. Close approach parameters recalculated based on the first Gaia data release
Dybczyński, Piotr A.; Berski, Filip
Context. First results based on Gaia data show that the well-known star Gliese 710 will be the closest flyby star in the next several Myrs and its minimum distance from the Sun will be almost five times smaller than that suggested by pre-Gaia solution.
Aims: The aim of this work is to investigate the proximity parameters and the influence of …
Do siblings always form and evolve simultaneously? Testing the coevality of multiple protostellar systems through SEDs
Fedele, D.; van Dishoeck, E. F.; Murillo, N. M. +1 more
Context. Multiplicity is common in field stars and among protostellar systems. Models suggest two paths of formation: turbulent fragmentation and protostellar disk fragmentation.
Aims: We attempt to find whether or not the coevality frequency of multiple protostellar systems can help to better understand their formation mechanism. The coevali…
Young, Star-forming Galaxies and Their Local Counterparts: The Evolving Relationship of Mass-SFR-Metallicity Since z ∼ 2.1
Trump, Jonathan R.; Schneider, Donald P.; Gronwall, Caryl +5 more
We explore the evolution of the Stellar Mass-Star Formation Rate (SFR)-Metallicity relation using a set of 256 COSMOS and GOODS galaxies in the redshift range 1.90 < z < 2.35. We present the galaxies’ rest-frame optical emission-line fluxes derived from IR-grism spectroscopy with the Hubble Space Telescope and combine these data with SFRs an…
HDO and SO2 thermal mapping on Venus. III. Short-term and long-term variations between 2012 and 2016
Encrenaz, T.; Atreya, S. K.; Bézard, B. +6 more
We present the analysis of a four-year observational campaign using the TEXES high-resolution imaging spectrometer at the NASA Infrared Telescope Facility to map sulfur dioxide and deuterated water over the disk of Venus. Data have been recorded in two spectral ranges around 1345 cm-1 (7.4 µm) and 530 cm-1 (19 µm)…
Charged particle signatures of the diamagnetic cavity of comet 67P/Churyumov-Gerasimenko
Szego, K.; Goetz, C.; Henri, P. +9 more
One of the scientific objectives of the Rosetta mission is to investigate the diamagnetic cavity of comet 67P/Churyumov-Gerasimenko. We employed combined data of several instruments of the Rosetta Plasma Consortium to identify and study diamagnetic cavity crossing events. Using electron data from the Ion Electron Sensor to complement the Magnetome…
Properties of planetward ion flows in Venus' magnetotail
Futaana, Y.; Zhang, T. L.; Rong, Z. J. +3 more
Venus is gradually losing some of its atmosphere in the form of ions through its induced magnetotail. Some of these ions have been reported previously to flow back to the planet. Proposed drivers are magnetic reconnection and deflection of pickup ions in the magnetic field. We analyze protons and oxygen ions with eV to keV energies acquired by the…