TY - JOUR
T1 - Solar-wind ion-driven X-ray emission from cometary and planetary atmospheres
T2 - Measurements and theoretical predictions of charge-exchange cross-sections and emission spectra for O6+ + H2O, CO, CO2, CH4, N2, NO, N2O, and Ar
AU - Machacek, J. R.
AU - Mahapatra, D. P.
AU - Schultz, D. R.
AU - Ralchenko, Yu
AU - Moradmand, A.
AU - El Ghazaly, M. O.A.
AU - Chutjian, A.
N1 - Publisher Copyright:
� 2015. The American Astronomical Society. All rights reserved..
PY - 2015/8/10
Y1 - 2015/8/10
N2 - Relevant to modeling and understanding X-ray emission from cometary and planetary atmospheres, total cross-sections for 1.17 and 2.33 keV/u O6+ colliding with H2O, CO, CO2, CH4, N2, NO, N2O, and Ar have been measured for the processes of single, double, and triple charge exchanges. Using these measurements as benchmarks, synthetic emission spectra spanning the X-ray, UV, and visible range have been calculated based on theoretical treatment of the transfer of between one and six electrons from the target neutrals to the projectile ion, followed by radiative and non-radiative decay of the highly excited states produced in these collisions. The results help add to the base of knowledge required to simulate ion-neutral processes in astrophysical environments; refine the present understanding of these fundamental atomic processes; and guide future observations, laboratory measurements, and theoretical predictions.
AB - Relevant to modeling and understanding X-ray emission from cometary and planetary atmospheres, total cross-sections for 1.17 and 2.33 keV/u O6+ colliding with H2O, CO, CO2, CH4, N2, NO, N2O, and Ar have been measured for the processes of single, double, and triple charge exchanges. Using these measurements as benchmarks, synthetic emission spectra spanning the X-ray, UV, and visible range have been calculated based on theoretical treatment of the transfer of between one and six electrons from the target neutrals to the projectile ion, followed by radiative and non-radiative decay of the highly excited states produced in these collisions. The results help add to the base of knowledge required to simulate ion-neutral processes in astrophysical environments; refine the present understanding of these fundamental atomic processes; and guide future observations, laboratory measurements, and theoretical predictions.
KW - atomic processes
KW - comets: general
KW - molecular processes
KW - solar wind
UR - http://www.scopus.com/inward/record.url?scp=84945267158&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/809/1/75
DO - 10.1088/0004-637X/809/1/75
M3 - Article
SN - 0004-637X
VL - 809
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 75
ER -