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

Journal Article · · The Astrophysical Journal (Online)
 [1];  [2];  [3];  [1];  [2];  [2];  [1];  [2];  [1];  [4]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  3. Univ. of Miami, Coral Gables, FL (United States)
  4. Yale Univ., New Haven, CT (United States)
+ Show Author Affiliations
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.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
National Aeronautic and Space Administration (NASA); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1604292
Report Number(s):
LLNL-JRNL--805905; arXiv:1909.07432v1; 1011187
Journal Information:
The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 2 Vol. 884; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
X-rays: ISM
X-rays: diffuse background