### Abstract

Original language | English |
---|---|

Article number | A10 |

Number of pages | 8 |

Journal | Astronomy and Astrophysics |

Volume | 599 |

Early online date | 20 Feb 2017 |

DOIs | |

Publication status | E-pub ahead of print - 20 Feb 2017 |

### Fingerprint

### Keywords

- astro-ph.HE
- atomic data
- atomic processes
- radiative recombination
- electron energy loss rate

### Cite this

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*Astronomy and Astrophysics*, vol. 599, A10. https://doi.org/10.1051/0004-6361/201629708

**The electron energy-loss rate due to radiative recombination.** / Mao, Junjie; Kaastra, Jelle; Badnell, N. R.

Research output: Contribution to journal › Article

TY - JOUR

T1 - The electron energy-loss rate due to radiative recombination

AU - Mao, Junjie

AU - Kaastra, Jelle

AU - Badnell, N. R.

PY - 2017/2/20

Y1 - 2017/2/20

N2 - For photoionized plasmas, electron energy-loss rates due to radiative recombination (RR) are required for thermal equilib- rium calculations, which assume a local balance between the energy gain and loss. While many calculations of total and/or partial RR rates are available from literature, specific calculations of associated RR electron energy-loss rates are lacking. Here we focus on electron energy-loss rates due to radiative recombination of H-like to Ne-like ions for all the elements up to and including zinc (Z = 30), over a wide temperature range. We use the AUTOSTRUCTURE code to calculate the level-resolved photoionization cross section and modify the ADASRR code so that we can simultaneously obtain level-resolved RR rate coefficients and associated RR electron energy-loss rate coefficients. The total RR rates and electron energy-loss rates of H i and He i are compared with those found in literature. Furthermore, we utilize and parameterize the weighted electron energy-loss factors (dimensionless) to characterize total electron energy-loss rates due to RR. The RR electron energy-loss data are archived according to the Atomic Data and Analysis Structure (ADAS) data class adf48. The RR electron energy-loss data are also incorporated into the SPEX code for detailed modelling of photoionized plamsas.

AB - For photoionized plasmas, electron energy-loss rates due to radiative recombination (RR) are required for thermal equilib- rium calculations, which assume a local balance between the energy gain and loss. While many calculations of total and/or partial RR rates are available from literature, specific calculations of associated RR electron energy-loss rates are lacking. Here we focus on electron energy-loss rates due to radiative recombination of H-like to Ne-like ions for all the elements up to and including zinc (Z = 30), over a wide temperature range. We use the AUTOSTRUCTURE code to calculate the level-resolved photoionization cross section and modify the ADASRR code so that we can simultaneously obtain level-resolved RR rate coefficients and associated RR electron energy-loss rate coefficients. The total RR rates and electron energy-loss rates of H i and He i are compared with those found in literature. Furthermore, we utilize and parameterize the weighted electron energy-loss factors (dimensionless) to characterize total electron energy-loss rates due to RR. The RR electron energy-loss data are archived according to the Atomic Data and Analysis Structure (ADAS) data class adf48. The RR electron energy-loss data are also incorporated into the SPEX code for detailed modelling of photoionized plamsas.

KW - astro-ph.HE

KW - atomic data

KW - atomic processes

KW - radiative recombination

KW - electron energy loss rate

UR - https://arxiv.org/abs/1612.01017v1

U2 - 10.1051/0004-6361/201629708

DO - 10.1051/0004-6361/201629708

M3 - Article

VL - 599

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A10

ER -