Solar wind charge exchange contribution to the ROSAT all sky survey maps
- Department of Physics, University of Miami, Coral Gables, FL, 33124 (United States)
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771 (United States)
- Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045 (United States)
- LATMOS/IPSL, UVSQ Universit Paris-Saclay, UPMC Universit Paris 06, CNRS, Guyancourt (France)
- The Henry A. Rowland Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States)
- GEPI Observatoire de Paris, CNRS, Universite Paris Diderot, F-92190, Meudon (France)
- Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109 (United States)
- Department of Physics, University of Wisconsin, Madison, WI 53706 (United States)
- Department of Mechanical Engineering, Boston University, Boston, MA 02215 (United States)
DXL (Diffuse X-ray emission from the Local Galaxy) is a sounding rocket mission designed to estimate the contribution of solar wind charge eXchange (SWCX) to the diffuse X-ray background and to help determine the properties of the Local Hot Bubble. The detectors are large area thin-window proportional counters with a spectral response that is similar to that of the PSPC used in the ROSAT All Sky Survey (RASS). A direct comparison of DXL and RASS data for the same part of the sky viewed from quite different vantage points in the solar system, and the assumption of approximate isotropy for the solar wind, allowed us to quantify the SWCX contribution to all six RASS bands (R1–R7, excluding R3). We find that the SWCX contribution at l=140{sup ∘},b=0{sup ∘}, where the DXL path crosses the Galactic plane, is 33%±6%(statistical)±12%(systematic) for R1, 44%±6%±5% for R2, 18%±12%±11% for R4, 14%±11%±9% for R5, and negligible for the R6 and R7 bands. Reliable models for the distribution of neutral H and He in the solar system permit estimation of the contribution of interplanetary SWCX emission over the the whole sky and correction of the RASS maps. We find that the average SWCX contribution in the whole sky is 26%±6%±13% for R1, 30%±4%±4% for R2, 8%±5%±5% for R4, 6%±4%±4% for R5, and negligible for R6 and R7.
- OSTI ID:
- 22868666
- Journal Information:
- Astrophysical Journal, Vol. 829, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for preparing bis-(silylalkyl)carbonate esters
Revisiting the Local Leo Cold Cloud and revised constraints on the Local Hot Bubble