The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Lego Figure holding a lego telescope. Photo

Henrik Hartman

Researcher (Leave of Absence)

Lego Figure holding a lego telescope. Photo

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

Author

  • M. A. Bautista
  • M. Melendez
  • Henrik Hartman
  • T. R. Gull
  • K. Lodders

Summary, in English

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.

Department/s

  • Lund Observatory - Undergoing reorganization

Publishing year

2011

Language

English

Pages

2643-2652

Publication/Series

Monthly Notices of the Royal Astronomical Society

Volume

410

Issue

4

Document type

Journal article

Publisher

Oxford University Press

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • atomic data
  • atomic processes
  • line: formation
  • stars: abundances
  • stars: individual: eta Carinae
  • ISM: atoms

Status

Published

ISBN/ISSN/Other

  • ISSN: 1365-2966