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The abundance of iron-peak elements and the dust composition in eta Carinae: manganese

Bautista, M. A.; Melendez, M.; Hartman, Henrik LU ; Gull, T. R. and Lodders, K. (2011) In Monthly Notices of the Royal Astronomical Society 410(4). p.2643-2652
Abstract
We study the chemical abundances of the strontium filament found in the ejecta of eta Carinae. In particular, we derive the abundances of iron-peak elements from the spectra of their singly ionized ions present in the optical/infrared (IR) spectra. In this paper we analyse the spectrum of Mn II using a new non-local thermodynamic equilibrium (non-LTE) model for this system. In constructing this models we carried out theoretical calculations of radiative transition rates and electron impact excitation rate coefficients. We find that relative to Ni the gas-phase abundance ratio of Mn is roughly solar, similar to the Cr abundance but in contrast to the large enhancements in the abundances of Sc and Ti. We interpret this result as an... (More)
We study the chemical abundances of the strontium filament found in the ejecta of eta Carinae. In particular, we derive the abundances of iron-peak elements from the spectra of their singly ionized ions present in the optical/infrared (IR) spectra. In this paper we analyse the spectrum of Mn II using a new non-local thermodynamic equilibrium (non-LTE) model for this system. In constructing this models we carried out theoretical calculations of radiative transition rates and electron impact excitation rate coefficients. We find that relative to Ni the gas-phase abundance ratio of Mn is roughly solar, similar to the Cr abundance but in contrast to the large enhancements in the abundances of Sc and Ti. We interpret this result as an indication of non-equilibrium condensation in the ejecta of eta Carinae. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomic data, atomic processes, line: formation, stars: abundances, stars: individual: eta Carinae, ISM: atoms
in
Monthly Notices of the Royal Astronomical Society
volume
410
issue
4
pages
2643 - 2652
publisher
Wiley-Blackwell
external identifiers
  • wos:000286211000047
  • scopus:78751616010
ISSN
1365-2966
DOI
10.1111/j.1365-2966.2010.17642.x
language
English
LU publication?
yes
id
ba51e9d1-28d5-485f-a069-7917e7e0e85a (old id 1882411)
date added to LUP
2011-04-04 13:37:11
date last changed
2017-01-01 04:11:08
@article{ba51e9d1-28d5-485f-a069-7917e7e0e85a,
  abstract     = {We study the chemical abundances of the strontium filament found in the ejecta of eta Carinae. In particular, we derive the abundances of iron-peak elements from the spectra of their singly ionized ions present in the optical/infrared (IR) spectra. In this paper we analyse the spectrum of Mn II using a new non-local thermodynamic equilibrium (non-LTE) model for this system. In constructing this models we carried out theoretical calculations of radiative transition rates and electron impact excitation rate coefficients. We find that relative to Ni the gas-phase abundance ratio of Mn is roughly solar, similar to the Cr abundance but in contrast to the large enhancements in the abundances of Sc and Ti. We interpret this result as an indication of non-equilibrium condensation in the ejecta of eta Carinae.},
  author       = {Bautista, M. A. and Melendez, M. and Hartman, Henrik and Gull, T. R. and Lodders, K.},
  issn         = {1365-2966},
  keyword      = {atomic data,atomic processes,line: formation,stars: abundances,stars: individual: eta Carinae,ISM: atoms},
  language     = {eng},
  number       = {4},
  pages        = {2643--2652},
  publisher    = {Wiley-Blackwell},
  series       = {Monthly Notices of the Royal Astronomical Society},
  title        = {The abundance of iron-peak elements and the dust composition in eta Carinae: manganese},
  url          = {http://dx.doi.org/10.1111/j.1365-2966.2010.17642.x},
  volume       = {410},
  year         = {2011},
}