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Solar Wind Charge eXchange X-ray (SWCX) emission in the heliosphere and Earth's exosphere is a hard to avoid signal in soft X-ray observations of astrophysical targets. On the other hand, the X-ray imaging possibilities offered by the SWCX…

Solar and Stellar Astrophysics · Physics 2023-08-29 Dimitra Koutroumpa

In this paper, we estimate the X-ray emission from close-in exoplanets. We show that the Solar/Stellar Wind Charge Exchange Mechanism (SWCX) which produces soft X-ray emission is very effective for hot Jupiters. In this mechanism, X-ray…

Earth and Planetary Astrophysics · Physics 2015-03-25 K. G. Kislyakova , L. Fossati , C. P. Johnstone , M. Holmström , V. V. Zaitsev , H. Lammer

The study of solar wind charge exchange (SWCX) emission is vital to both the X-ray astrophysics and heliophysics communities. SWCX emission contaminates all astrophysical observations in X-rays regardless of the direction. Ignoring this…

High Energy Astrophysical Phenomena · Physics 2024-10-29 R. Ringuette , K. D. Kuntz , D. Koutroumpa , P. Kaaret , D. LaRocca , J. Richardson

The major sources of the Soft X-ray Background (SXRB), besides distinct structures as supernovae and superbubbles (e.g. Loop I), are: (i) an absorbed extragalactic emission following a power law, (ii) an absorbed thermal component ~2x10^6…

Astrophysics · Physics 2009-11-13 Dimitra Koutroumpa , Rosine Lallement , Vasili Kharchenko , Alex Dalgarno

Solar Wind Charge-Exchange (SWCX) emission is present in every X-ray observation of an astrophysical object. The emission is problematic when one cannot remove the foreground by the simultaneous measurement of a nearby field. SWCX emission…

High Energy Astrophysical Phenomena · Physics 2018-12-12 K. D. Kuntz

The ubiquitous diffuse soft (1/4 keV) X-ray background was one of the earliest discoveries of X-ray astronomy. At least some of the emission may arise from charge exchange between solar wind ions and neutral atoms in the heliosphere, but no…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Randall K. Smith , Adam R. Foster , Richard J. Edgar , Nancy S. Brickhouse

We present calculations of the heliospheric SWCX emission spectra and their contributions in the ROSAT 1/4 keV band. We compare our results with the soft X-ray diffuse background (SXRB) emission detected in front of 378 identified shadowing…

Astrophysics · Physics 2011-02-11 D. Koutroumpa , R. Lallement , J. C. Raymond , V. Kharchenko

We describe a method for identifying XMM-Newton observations that have been affected by Solar Wind Charge Exchange (SWCX) emission and present preliminary results of previously unidentified cases of such emission within the XMM-Newton…

Astrophysics · Physics 2009-11-13 J. A. Carter , S. Sembay

Soft x-ray emissions induced by solar wind ions that collide with neutral material in the solar system have been detected around planets, and were proposed as a remote probe for the solar wind interaction with the Martian exosphere. A…

Earth and Planetary Astrophysics · Physics 2023-02-08 G. Y. Liang , T. R. Sun , H. Y. Lu , X. L. Zhu , Y. Wu , S. B. Li , H. G. Wei , D. W. Yuan , W. Cui , X. W. Ma , G. Zhao

The hot Local Bubble surrounding the solar neighborhood has been primarily studied through observations of its soft X-ray emission. The measurements were obtained by attributing all of the observed local soft X-rays to the bubble. However,…

Astrophysics · Physics 2009-06-23 Robin L. Shelton

DXL (Diffuse X-ray emission from the Local Galaxy) is a sounding rocket mission designed to estimate the contribution of Solar Wind Charge eXchange (SWCX) to the Diffuse X-ray Background (DXB) and to help determine the properties of the…

SRG/eROSITA is situated in a halo orbit around L2 where the highly variable solar wind charge exchange (SWCX) emission from Earth's magnetosheath is expected to be negligible. The soft X-ray foreground emissions from the local hot bubble…

Astrophysics of Galaxies · Physics 2023-06-12 Michael C. H. Yeung , Michael J. Freyberg , Gabriele Ponti , Konrad Dennerl , Manami Sasaki , Andy Strong

Charge exchange (CX) has emerged in X-ray emission modeling as a significant process that must be considered in many astrophysical environment--particularly comets. Comets host an interaction between solar wind ions and cometary neutrals to…

High Energy Astrophysical Phenomena · Physics 2017-07-31 P. D. Mullen , R. S. Cumbee , D. Lyons , L. Gu , J. Kaastra , R. L. Shelton , P. C. Stancil

We study the 0.57 keV (O VII triplet) and 0.65 keV (O VIII) diffuse emission generated by charge transfer collisions between solar wind (SW) oxygen ions and interstellar H and He neutral atoms in the inner Heliosphere. These lines which…

Astrophysics · Physics 2009-11-13 D. Koutroumpa , F. Acero , R. Lallement , J. Ballet , V. Kharchenko

Aims. We study the soft X-ray emission induced by charge exchange (CX) collisions between solar-wind, highly charged ions and neutral atoms of the Martian exosphere. Methods. A 3D multi species hybrid simulation model with improved spatial…

Earth and Planetary Astrophysics · Physics 2015-06-11 Dimitra Koutroumpa , Ronan Modolo , Gerard Chanteur , Jean-Yves Chaufray , Vasili Kharchenko , Rosine Lallement

We wished to analyse a sample of observations from the XMM-Newton Science Archive to search for evidence of exospheric solar wind charge exchange (SWCX) emission. We analysed 3012 observations up to and including revolution 1773. The method…

Instrumentation and Methods for Astrophysics · Physics 2015-05-27 J. A. Carter , S. Sembay , A. M. Read

Solar wind charge exchange (SWCX) is the primary contamination to soft X-ray emission lines from the Milky Way (MW) hot gas. We report a solar-cycle ($\approx 10$ yr) temporal variation of observed \ion{O}{7} and \ion{O}{8} emission line…

Solar and Stellar Astrophysics · Physics 2022-05-11 Zhijie Qu , Dimitra Koutroumpa , Joel N. Bregman , Kip D. Kuntz , Philip Kaaret

We present results from a sample of XMM-Newton and Suzaku observations of interstellar clouds that cast shadows in the soft X-ray background (SXRB) - the first uniform analysis of such a sample from these missions. By fitting to the on- and…

Astrophysics of Galaxies · Physics 2015-08-06 David B. Henley , Robin L. Shelton

We study the EUV/soft X-ray emission generated by charge transfer between solar wind heavy ions and interstellar H and He neutral atoms in the inner Heliosphere. We present heliospheric maps and spectra for stationary solar wind, depending…

The past decade has seen a surge of interest in astrophysical charge exchange (CX). The impetus was the discovery of X-ray emission from comets in 1996, soon followed by the observation of CX emission in planetary atmospheres and throughout…

Astrophysics · Physics 2009-11-13 B. J. Wargelin , P. Beiersdorfer , G. V. Brown
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