collisional ionization rates (trac #385)

reported by: @CloudyLex

X-ray emission from thin plasmas. Collisional ionization for atoms and ions of H to Zn

I. Urdampilleta, J. S. Kaastra, M. Mehdipour

(Submitted on 20 Feb 2017 (v1), last revised 3 Mar 2017 (this version, v2))

Every observation of astrophysical objects involving a spectrum requires atomic data 
for the interpretation of line fluxes, line ratios and ionization state of the emitting 
plasma. One of the processes which determines it is collisional ionization. In this 
study an update of the direct ionization (DI) and excitation-autoionization (EA) 
processes is discussed for the H to Zn-like isoelectronic sequences. In the last years 
new laboratory measurements and theoretical calculations of ionization cross 
sections have become available. We provide an extension and update of previous 
published reviews in the literature. We include the most recent experimental 
measurements and fit the cross sections of all individual shells of all ions from H to 
Zn. These data are described using an extension of Younger's and Mewe's formula, 
suitable for integration over a Maxwellian velocity distribution to derive the subshell 
ionization rate coefficients. These ionization rate coefficients are incorporated in the 
high-resolution plasma code and spectral fitting tool SPEX V3.0.

Comments:   Accepted for publication in A&A, 22 pages, 18 figures

Subjects:   High Energy Astrophysical Phenomena (astro-ph.HE); Astrophysics of 
Galaxies (astro-ph.GA)

Cite as:    arXiv:1702.06007 [astro-ph.HE]
    (or arXiv:1702.06007v2 [astro-ph.HE] for this version)

Migrated from https://www.nublado.org/ticket/385

{
    "status": "new",
    "changetime": "2019-02-04T13:02:49Z",
    "_ts": "1549285369825011",
    "description": "{{{\nX-ray emission from thin plasmas. Collisional ionization for atoms and ions of H to Zn\n\nI. Urdampilleta, J. S. Kaastra, M. Mehdipour\n\n(Submitted on 20 Feb 2017 (v1), last revised 3 Mar 2017 (this version, v2))\n\nEvery observation of astrophysical objects involving a spectrum requires atomic data \nfor the interpretation of line fluxes, line ratios and ionization state of the emitting \nplasma. One of the processes which determines it is collisional ionization. In this \nstudy an update of the direct ionization (DI) and excitation-autoionization (EA) \nprocesses is discussed for the H to Zn-like isoelectronic sequences. In the last years \nnew laboratory measurements and theoretical calculations of ionization cross \nsections have become available. We provide an extension and update of previous \npublished reviews in the literature. We include the most recent experimental \nmeasurements and fit the cross sections of all individual shells of all ions from H to \nZn. These data are described using an extension of Younger's and Mewe's formula, \nsuitable for integration over a Maxwellian velocity distribution to derive the subshell \nionization rate coefficients. These ionization rate coefficients are incorporated in the \nhigh-resolution plasma code and spectral fitting tool SPEX V3.0.\n\nComments:\tAccepted for publication in A&A, 22 pages, 18 figures\n\nSubjects:\tHigh Energy Astrophysical Phenomena (astro-ph.HE); Astrophysics of \nGalaxies (astro-ph.GA)\n\nCite as:\tarXiv:1702.06007 [astro-ph.HE]\n \t(or arXiv:1702.06007v2 [astro-ph.HE] for this version)\n\n}}}",
    "reporter": "gary",
    "cc": "",
    "resolution": "",
    "time": "2017-03-27T14:22:09Z",
    "component": "atomic/molecular data base",
    "summary": "collisional ionization rates",
    "priority": "good to do",
    "keywords": "",
    "version": "trunk",
    "milestone": "no milestone",
    "owner": "nobody",
    "type": "enhancement"
}

cloudy-astrophysics / bug-tracker-migration-test

collisional ionization rates (trac #385) #387