Search Publications
The photochemical fractionation of oxygen isotopologues in Titan's atmosphere
Dobrijevic, M.; Loison, J. C.; Hickson, K. M. +1 more
The origin of CO and the external source of H2O in the atmosphere of Titan is still a matter of debate. We investigated the chemical fractionation of oxygen isotopologues in order to give new constraints on the origin of oxygen species. We created a new chemical scheme and we developed a 1-D time-dependent photochemical model to compute…
Joint two-point observations of LF-waves at 67P/Churyumov—Gerasimenko
Glassmeier, K. -H.; Richter, I.; Fornacon, K. -H. +5 more
After the Rosetta mission reached its target comet 67P/Churyumov-Gerasimenko, the lander Philae touched down on the surface on 2014 November 12. During the First-Science-Sequence after touchdown the lander magnetometer ROMAP and the orbiter magnetometer RPC-MAG were both operating simultaneously which allowed for in situ magnetic two-point observa…
The effect of like-charge attraction on aerosol growth in the atmosphere of Titan
Lindgren, Eric B.; Stamm, Benjamin; Chan, Ho-Kei +3 more
The formation of aerosols in the atmosphere of Titan is based extensively on ion-neutral chemistry and physical condensation processes. Herein it is shown that the formation of aerosols may also occur through an alternative pathway that involves the physical aggregation of negatively charged particles, which are known to be abundant in the satelli…
Chromospheric impact of an exploding solar granule
Bello González, N.; Rezaei, R.; Fischer, C. E.
Context. Observations of multi-wavelength and therefore height-dependent information following events throughout the solar atmosphere and unambiguously assigning a relation between these rapidly evolving layers are rare and difficult to obtain. Yet, they are crucial for our understanding of the physical processes that couple the different regimes …
Simultaneous Constraints on the Mass and Radius of Aql X-1 from Quiescence and X-Ray Burst Observations
Chen, Li; Falanga, Maurizio; Li, Zhaosheng +2 more
The measurement of neutron star mass and radius is one of the most direct ways to distinguish between various dense matter equations of state. The mass and radius of accreting neutron stars hosted in low-mass X-ray binaries can be constrained by several methods, including photospheric radius expansion from type I X-ray bursts and from quiescent sp…
UV production of methane from surface and sedimenting IDPs on Mars in light of REMS data and with insights for TGO
Moores, John E.; Smith, Christina L.; Schuerger, Andrew C.
This paper refines model predictions for the production of methane from UV-irradiated interplanetary dust particles (IDPs) now that the Rover Environmental Monitoring Station (REMS) instrument onboard the Mars Science Laboratory (MSL) Rover has made the first measurements of the UV environment on the surface of Mars, at Gale Crater. Once these mea…
Asymmetries in the Magnetosheath Field Draping on Venus' Nightside
Volwerk, M.; Bertucci, C.; Delva, M. +1 more
Draping features of the interplanetary magnetic field around nonmagnetic bodies, especially Venus, have been studied in detail in numerical simulations and also from observations. Existing analytical and numerical work for nonperpendicular interplanetary magnetic field and solar wind velocity direction show a kink in the draped fieldlines in the n…
Main Cause of the Poloidal Plasma Motion Inside a Magnetic Cloud Inferred from Multiple-Spacecraft Observations
Wang, Yuming; Shen, Chenglong; Liu, Rui +3 more
Although the dynamical evolution of magnetic clouds (MCs) has been one of the foci of interplanetary physics for decades, only few studies focus on the internal properties of large-scale MCs. Recent work by Wang et al. (J. Geophys. Res.120, 1543, 2015) suggested the existence of the poloidal plasma motion in MCs. However, the main cause of this mo…
Galactic Sources Detected in the NuSTAR Serendipitous Survey
Hailey, Charles J.; Mori, Kaya; Aird, James +13 more
The Nuclear Spectroscopic Telescope Array (NuSTAR) provides an improvement in sensitivity at energies above 10 keV by two orders of magnitude over non-focusing satellites, making it possible to probe deeper into the Galaxy and universe. Lansbury and collaborators recently completed a catalog of 497 sources serendipitously detected in the 3-24 keV …
A relationship of polycyclic aromatic hydrocarbon features with galaxy merger in star-forming galaxies at z < 0.2
Oyabu, Shinki; Yamagishi, Mitsuyoshi; Kaneda, Hidehiro +5 more
Using the AKARI, Wide-field Infrared Survey Explorer (WISE), Infrared Astronomical Satellite (IRAS), Sloan Digital Sky Survey (SDSS) and Hubble Space Telescope (HST) data, we investigated the relation of polycyclic aromatic hydrocarbon (PAH) mass (MPAH), very small grain mass (MVSG), big grain mass (MBG) and stella…