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  1. Article

    Open Access

    The Lunar Environment Heliophysics X-ray Imager (LEXI) Mission

    The Lunar Environment heliospheric X-ray Imager (LEXI) is a wide field-of-view soft X-ray telescope developed to study solar wind-magnetosphere coupling. LEXI is part of the Blue Ghost 1 mission comprised of 1...

    B. M. Walsh, K. D. Kuntz, S. Busk, T. Cameron, D. Chornay in Space Science Reviews (2024)

  2. No Access

    Article

    A disk-dominated and clumpy circumgalactic medium of the Milky Way seen in X-ray emission

    The Milky Way galaxy is surrounded by a circumgalactic medium1 that may play a key role in galaxy evolution as the source of gas for star formation and a repository of metals and energy produced by star formation...

    P. Kaaret, D. Koutroumpa, K. D. Kuntz, K. Jahoda, J. Bluem, H. Gulick in Nature Astronomy (2020)

  3. No Access

    Article

    Solar wind charge exchange: an astrophysical nuisance

    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...

    K. D. Kuntz in The Astronomy and Astrophysics Review (2018)

  4. Article

    Open Access

    Imaging Plasma Density Structures in the Soft X-Rays Generated by Solar Wind Charge Exchange with Neutrals

    Both heliophysics and planetary physics seek to understand the complex nature of the solar wind’s interaction with solar system obstacles like Earth’s magnetosphere, the ionospheres of Venus and Mars, and come...

    David G. Sibeck, R. Allen, H. Aryan, D. Bodewits, P. Brandt in Space Science Reviews (2018)

  5. No Access

    Article

    The origin of the local 1/4-keV X-ray flux in both charge exchange and a hot bubble

    The contribution of solar-wind ions exchanging electrons with helium and hydrogen near the Sun is shown to be only about 40 per cent of the 1/4-keV X-ray flux observed in the Galactic plane; this supports the ...

    M. Galeazzi, M. Chiao, M. R. Collier, T. Cravens, D. Koutroumpa, K. D. Kuntz in Nature (2014)

  6. No Access

    Article

    Exception tests the rules

    Detailed observations of an intermittent ultraluminous X-ray source indicate that its emission is unlikely to be powered by mass accretion onto an intermediate-mass black hole as previously thought. See Letter ...

    K. D. Kuntz in Nature (2013)

  7. No Access

    Chapter and Conference Paper

    The Chandra View of M101: What Can We Learn About the Milky Way?

    M101 is a nearby face-on spiral galaxy which can be used to study the hot ISM in the MilkyWay. We have used a deep Chandra image of M101 to characterize the X-ray emission. The X-ray emission follows the optical ...

    K. D. Kuntz in How does the Galaxy Work? (2004)

  8. No Access

    Chapter and Conference Paper

    Small-scale 1/4keV fluctuations due to the local hot bubble

    To determine fluctuations in the 1/4 keV emission due to the LHB, without contamination due to sources within the galactic disk, the Galactic halo or the extragalactic background, we have formed a mosaic of PS...

    K. D. Kuntz, S. L. Snowden, R. S. Warwick in The Local Bubble and Beyond Lyman-Spitzer-… (1998)