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A dual velocity in the highly ionized wind of the luminous narrow line Seyfert galaxy PG 1211+143
Vaughan, S.; Reeves, J. N.; Pounds, K. A. +1 more
An extended XMM-Newton observation of the luminous narrow line Seyfert galaxy PG 1211+143 in 2014 has revealed a complex high velocity outflow, with components distinguished in velocity, ionization and short-term variability. We report here the detection of previously unseen spectral structure in Fe K absorption, finding a second velocity componen…
Spectral mapping of V348 Puppis: spiral arms in the period gap
Saito, R. K.; Baptista, R.
We report the analysis of Hubble Space Telescope (HST) UV-optical spectroscopy of the nova-like variable V348 Puppis with eclipse mapping techniques. We measured the eclipse width at disc centre and determined a lower limit on the mass ratio of q > 0.3, with a tight relation between q and the binary inclination i. For 0.31 ≤ q ≤ 0.6, we have 79…
Coronal partings
Dumin, Yurii V.; Nikulin, Igor F.
The basic observational properties of "coronal partings"-the special type of quasi-one-dimensional magnetic structures, identified by a comparison of the coronal X-ray and EUV images with solar magnetograms-are investigated. They represent the channels of opposite polarity inside the unipolar large-scale magnetic fields, formed by the rows of magn…
X-Raying the Dark Side of Venus—Scatter from Venus’ Magnetotail?
Weber, M.; Peres, G.; Reale, F. +3 more
We analyze significant X-ray, EUV, and UV emission coming from the dark side of Venus observed with Hinode/XRT and Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA) during a transit across the solar disk that occurred in 2012. As a check we have analyzed an analogous Mercury transit that occurred in 2006. We have used the latest ve…
Interstellar Pickup Ion Production in the Global Heliosphere and Heliosheath
Wu, Y.; Guo, X.; Florinski, V.
Interstellar pickup ions (PUIs) play a significant part in mediating the solar wind (SW) interaction with the interstellar medium. In this paper, we examine the details of spatial variation of the PUI velocity distribution function (VDF) in the SW by solving the PUI transport equation. We assume the PUI distribution is isotropic resulting from str…
Temporal Evolution of Solar Energetic Particle Spectra
Dalla, Silvia; Doran, Donald J.
During solar flares and coronal mass ejections, Solar Energetic Particles (SEPs) may be released into the interplanetary medium and near-Earth locations. The energy spectra of SEP events at 1 AU are typically averaged over the entire event or studied in a few snapshots. In this article we analyze the time evolution of the energy spectra of four la…
Unveiing the X‑ray/UV properties of disk winds in active galactic nuclei using broad and mini‑broad absorption line quasars
Giustini, M.
We present the results of the uniform analysis of 46 XMM-Newton observations of six BAL and seven mini-BAL QSOs belonging to the Palomar-Green Quasar catalogue. Moderate-quality X-ray spectroscopy was performed with the EPIC-pn, and allowed to characterise the general source spectral shape to be complex, significantly deviating from a power law em…
Discovery of hard phase lags in the pulsed emission of GRO J1744-28
Sanna, A.; Di Salvo, T.; Burderi, L. +4 more
We report on the discovery and energy dependence of hard phase lags in the 2.14 Hz pulsed profiles of GRO J1744-28. We used data from XMM-Newton and NuSTAR. We were able to well constrain the lag spectrum with respect to the softest (0.3-2.3 keV) band: the delay shows increasing lag values reaching a maximum delay of ∼12 ms, between 6 and 6.4 keV.…
Observations of the surface of Titan by the Radar Altimeters on the Huygens Probe
Lorenz, R. D.; Plettemeier, D.; Witasse, O. +8 more
Results from the radar altimeters on board the Huygens probe are reported, noting the content of data archived on the NASA Planetary Data System and its ESA counterpart. These instruments provide unique high-resolution information on the topography and electrical properties of the Titan surface over a ∼15 km track across a boundary between a brigh…
Trapping of Noble Gases by Radiative Association with H3 + in the Protosolar Nebula
Mousis, O.; Pauzat, F.; Bacchus-Montabonel, M. -C. +1 more
The heavy noble gas deficiencies observed in Titan’s atmosphere and in comets have been proposed to be related to a sequestration process by {{{H}}}3+ in the gas phase at the early protosolar nebula. Chemical thermodynamics and astrophysics modeling are favorable to this hypothesis, as presented in preceding papers. However, …