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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…
Signatures of Hot Molecular Hydrogen Absorption from Protoplanetary Disks. I. Non-thermal Populations
Loyd, R. O. Parke; Kruczek, Nicholas; France, Kevin +2 more
The environment around protoplanetary disks (PPDs) regulates processes that drive the chemical and structural evolution of circumstellar material. We perform a detailed empirical survey of warm molecular hydrogen (H2) absorption observed against H I-Lyα (Lyα: λ1215.67) emission profiles for 22 PPDs, using archival Hubble Space Telescope…
Origin of the solar wind: A novel approach to link in situ and remote observations. A study for SPICE and SWA on the upcoming Solar Orbiter mission
Berger, Lars; Wimmer-Schweingruber, Robert; Peleikis, Thies +1 more
Context. During the last decades great progress has been achieved in understanding the properties and the origin of the solar wind. While the sources for the fast solar wind are well understood, the sources for the slow solar wind remain elusive.
Aims: The upcoming Solar Orbiter mission aims to improve our understanding of the sources of the …
On the frequency of star-forming galaxies in the vicinity of powerful AGNs: The case of SMM J04135+10277
Knudsen, K. K.; Drouart, G.; Lagos, C. D. P. +2 more
Context. In the last decade several massive molecular gas reservoirs were found <100 kpc distance from active galactic nuclei (AGNs), residing in gas-rich companion galaxies. The study of AGN-gas-rich companion systems opens the opportunity to determine whether the stellar mass of massive local galaxies was formed in their host after a merger e…
Laboratory study of methyl isocyanate ices under astrophysical conditions
Cernicharo, J.; Timón, V.; Maté, B. +5 more
Methyl isocyanate has been recently detected in comet 67P/Churyumov-Gerasimenko (67P/CG) and in the interstellar medium. New physicochemical studies on this species are now necessary as tools for subsequent studies in astrophysics. In this work, infrared spectra of solid CH3NCO have been obtained at temperatures of relevance for astrono…
High-redshift active galactic nuclei and the next decade of Chandra and XMM-Newton
Brandt, W. N.; Vito, F.
We briefly review how X-ray observations of high-redshift active galactic nuclei (AGNs) at z = 4-7 have played a critical role in understanding their basic demographics as well as their physical processes; for example, absorption by nuclear material and winds, accretion rates, and jet emission. We point out some key remaining areas of uncertainty,…
Magnetic field geometry and chemical abundance distribution of the He-strong star CPD -57°3509
Ilyin, I.; Przybilla, N.; Briquet, M. +9 more
The magnetic field of CPD -57°3509 was recently detected in the framework of the BOB (B fields in OB stars) collaboration. We acquired low-resolution spectropolarimetric observations of CPD -57°3509 with the FOcal Reducer low-dispersion Spectrograph 2 and high-resolution UV-Visual Echelle Spectrograph observations randomly distributed over a few m…