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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

We study roles of the thermosphere and exosphere on the Martian ionospheric structure and ion escape rates in the process of the solar wind-Mars interaction. We employ a four-species multifluid MHD (MF-MHD) model to simulate the Martian…

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

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 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

We present the analysis of an observation by XMM-Newton that exhibits strongly variable, low-energy diffuse X-ray line emission. We reason that this emission is due to localised solar wind charge exchange (SWCX), originating from a passing…

High Energy Astrophysical Phenomena · Physics 2015-05-14 J. A Carter , S. Sembay , A. M. Read

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

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

We present an XMM-Newton spectrum of diffuse X-ray emission from within the solar system. The spectrum is dominated by probable C VI lines at 0.37 keV and 0.46 keV, an O VII line at 0.56 keV, O VIII lines at 0.65 keV and ~0.8 keV, Ne IX…

Astrophysics · Physics 2009-11-10 S. L. Snowden , M. R. Collier , K. D. Kuntz

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…

We report results of a theoretical investigation of polarization of the X-ray emissions induced in charge-exchange collisions of fully stripped solar wind ions C$^{6+}$ and O$^{8+}$ with the heliospheric hydrogen atoms. The polarization of…

Earth and Planetary Astrophysics · Physics 2013-11-14 Marko Gacesa , Hans-Reinhard Müller , Robin Côté , Vasili Kharchenko

We present an analysis of a pair of Suzaku spectra of the soft X-ray background (SXRB), obtained from pointings on and off a nearby shadowing filament in the southern Galactic hemisphere. Because of the different Galactic column densities…

Astrophysics · Physics 2014-11-18 David B. Henley , Robin L. Shelton

Looking at the Mars-solar wind interaction on a larger spatial scale than the near Mars region, the planet can be seen as an ion source interacting with the solar wind, in many ways like a comet, but with a smaller ion source region. Here…

Space Physics · Physics 2015-12-09 Mats Holmstrom , Xiao-Dong Wang

Mars was observed in X-rays during April 3-5 2008 for 82 ksec with the Japanese Suzaku observatory. Mars has been known to emit X-rays via the scattering of solar X-rays and via the charge exchange between neutral atoms in the exosphere and…

Earth and Planetary Astrophysics · Physics 2016-06-08 Kumi Ishikawa , Yuichiro Ezoe , Takaya Ohashi , Naoki Terada , Yoshifumi Futaana

Experimental and theoretical state-selective X-ray spectra resulting from single-electron capture in charge exchange (CX) collisions of Ne^10+ with He, Ne, and Ar are presented for a collision velocity of 933 km s^-1 (4.54 keV nucleon^-1),…

High Energy Astrophysical Phenomena · Physics 2015-05-19 R. Ali , P. A. Neill , P. Beiersdorfer , C. L. Harris , D. R. Schultz , P. C. Stancil

Solar wind charged particles interact with diffuse gas within the heliosphere, producing soft X-rays. This solar wind charge exchange (SWCX) process produces foreground emission that complicates interpretation of X-ray observations. In this…

Solar and Stellar Astrophysics · Physics 2026-04-30 K. Dennerl , G. Ponti , X. Zheng , M. J. Freyberg , S. Friedrich , Th. Müller , M. C. H. Yeung

The precipitation of energetic neutral atoms, produced through charge exchange collisions between solar wind ions and thermal atmospheric gases, is investigated for the Martian atmosphere. Connections between parameters of precipitating…

Earth and Planetary Astrophysics · Physics 2015-06-19 Nicholas Lewkow , Vasili Kharchenko

We propose a new method to estimate ion escape from unmagnetized planets that combines observations and models. Assuming that upstream solar wind conditions are known, a computer model of the interaction between the solar wind and the…

Earth and Planetary Astrophysics · Physics 2022-02-01 M. Holmstrom

In this Letter, we make use of sophisticated 3D numerical simulations to assess the extent of atmospheric ion and photochemical losses from Mars over time. We demonstrate that the atmospheric ion escape rates were significantly higher (by…

It has been proposed that the charge exchange (CX) process at the interface between hot and cool interstellar gases could contribute significantly to the observed soft X-ray emission in star forming galaxies. We analyze the XMM-Newton/RGS…

Astrophysics of Galaxies · Physics 2015-06-22 Shuinai Zhang , Q. Daniel Wang , Li Ji , Randall K. Smith , Adam R. Foster , Xin Zhou
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