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

Abstract

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

21 pages, 6 figures, accepted for publication in ApJ

References in corpus (8)

• The Galactic Centre Chimney
• The origin of the 'local' 1/4 keV X-ray flux in both charge exchange and a hot bubble
• The Structure of the Local Hot Bubble
• Resolving the Origin of the Diffuse Soft X-ray Background
• X-ray and UV spectroscopy of Galactic diffuse hot gas along the LMC X--3 sight line
• Determining The Galactic Halo's Emission Measure from UV and X-ray Observations
• Observed Limits on Charge Exchange Contributions to the Diffuse X-ray Background
• Contribution of Unresolved Point Sources to the Diffuse X-ray Background below 1 keV

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• Scientific Objectives of the Hot Universe Baryon Surveyor (HUBS) Mission
• The SRG/eROSITA diffuse soft X-ray background. I. The local hot bubble in the western Galactic hemisphere
• A detailed look at the thermal and non-thermal X-ray emission from the Vela supernova remnant with SRG/eROSITA
• The Relative Supernovae Contribution to the Chemical Enrichment History of Abell 1837
• eROSITA X-ray Analysis of the PeVatron Candidate Westerlund 1
• Optimal Filtering of Overlapped Pulses in Microcalorimeter Data
• A new understanding of the Gemini-Monoceros X-ray enhancement from discoveries with eROSITA
• Point source contribution to the Diffuse X-ray Background below 1 keV and its effect on our understanding of the circum-galactic medium
• In Search of an Interface between Warm and Hot Gas within the Local Bubble
• Studying the multi-phase interstellar medium in the Large Magellanic Cloud with SRG/eROSITA -- I. Analysis of diffuse X-ray emission