A High Spectral Resolution Study of the Soft X-Ray Background with the X-Ray Quantum Calorimeter

Dallas Wulf, Megan E. Eckart, Massimiliano Galeazzi, Felix Jaeckel, Richard L. Kelley, Caroline A. Kilbourne, Kelsey M. Morgan, F. Scott Porter, Dan McCammon, Andrew E. Szymkowiak

Research output: Contribution to journalArticle

Abstract

We present here a combined analysis of four high spectral resolution observations of the Diffuse X-ray Background, made using the University of Wisconsin-Madison/Goddard Space Flight Center X-ray Quantum Calorimeter sounding rocket payload. The observed spectra support the existence of a ∼0.1 keV Local Hot Bubble and a ∼0.2 keV Hot Halo, with discrepancies between repeated observations compatible with expected contributions of time-variable emission from Solar Wind Charge Exchange. An additional component of ∼0.9 keV emission observed only at low galactic latitudes can be consistently explained by unresolved dwarf M stars.

Original languageEnglish (US)
Article number120
JournalAstrophysical Journal
Volume884
Issue number2
DOIs
StatePublished - Oct 20 2019

Keywords

  • X-rays: ISM
  • X-rays: diffuse background
  • instrumentation: spectrographs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Wulf, D., Eckart, M. E., Galeazzi, M., Jaeckel, F., Kelley, R. L., Kilbourne, C. A., Morgan, K. M., Porter, F. S., McCammon, D., & Szymkowiak, A. E. (2019). A High Spectral Resolution Study of the Soft X-Ray Background with the X-Ray Quantum Calorimeter. Astrophysical Journal, 884(2), [120]. https://doi.org/10.3847/1538-4357/ab41f8