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eta Carinae: linelist for the emission spectrum of the Weigelt blobs in the 1700 to 10 400 angstrom wavelength region

Zethson, T.; Johansson, Sveneric LU ; Hartman, Henrik LU and Gull, T. R. (2012) In Astronomy & Astrophysics 540.
Abstract
Aims. We present line identifications in the 1700 to 10 400 angstrom region for the Weigelt blobs B and D, located 0.'' 1 to 0 ''.3 NNW of Eta Carinae. The aim of this work is to characterize the behavior of these luminous, dense gas blobs in response to the broad highstate and the short low-state of. Carinae during its 5.54-year spectroscopic period. Methods. The spectra were recorded in a low state (March 1998) and an early high state (February 1999) with the Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) from 1640 to 10 400 angstrom using the 52 '' x 0.1 aperture centered on Eta Carinae at position angle, PA = 332 degrees. Extractions of the reduced spectrum including both Weigelt B and D, 0.'' 28 in length along... (More)
Aims. We present line identifications in the 1700 to 10 400 angstrom region for the Weigelt blobs B and D, located 0.'' 1 to 0 ''.3 NNW of Eta Carinae. The aim of this work is to characterize the behavior of these luminous, dense gas blobs in response to the broad highstate and the short low-state of. Carinae during its 5.54-year spectroscopic period. Methods. The spectra were recorded in a low state (March 1998) and an early high state (February 1999) with the Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) from 1640 to 10 400 angstrom using the 52 '' x 0.1 aperture centered on Eta Carinae at position angle, PA = 332 degrees. Extractions of the reduced spectrum including both Weigelt B and D, 0.'' 28 in length along the slit, were used to identify the narrow, nebular emission lines, measure their wavelengths and estimate their fluxes. Results. A linelist of 2500 lines is presented for the high and low states of the combined Weigelt blobs B and D. The spectra are dominated by emission lines from the iron-group elements, but include lines from lighter elements including parity-permitted and forbidden lines. A number of lines are fluorescent lines pumped by H Ly alpha. Other lines show anomalous excitation. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
line: identification, circumstellar matter, stars: kinematics and, dynamics, stars: individual: eta Carinae
in
Astronomy & Astrophysics
volume
540
publisher
EDP Sciences
external identifiers
  • wos:000303315400147
  • scopus:84859604501
ISSN
0004-6361
DOI
10.1051/0004-6361/201116696
language
English
LU publication?
yes
id
a0756ff1-bc69-4cb9-814c-b4476cee3383 (old id 2561831)
date added to LUP
2012-06-01 11:46:21
date last changed
2017-03-26 03:50:53
@article{a0756ff1-bc69-4cb9-814c-b4476cee3383,
  abstract     = {Aims. We present line identifications in the 1700 to 10 400 angstrom region for the Weigelt blobs B and D, located 0.'' 1 to 0 ''.3 NNW of Eta Carinae. The aim of this work is to characterize the behavior of these luminous, dense gas blobs in response to the broad highstate and the short low-state of. Carinae during its 5.54-year spectroscopic period. Methods. The spectra were recorded in a low state (March 1998) and an early high state (February 1999) with the Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) from 1640 to 10 400 angstrom using the 52 '' x 0.1 aperture centered on Eta Carinae at position angle, PA = 332 degrees. Extractions of the reduced spectrum including both Weigelt B and D, 0.'' 28 in length along the slit, were used to identify the narrow, nebular emission lines, measure their wavelengths and estimate their fluxes. Results. A linelist of 2500 lines is presented for the high and low states of the combined Weigelt blobs B and D. The spectra are dominated by emission lines from the iron-group elements, but include lines from lighter elements including parity-permitted and forbidden lines. A number of lines are fluorescent lines pumped by H Ly alpha. Other lines show anomalous excitation.},
  author       = {Zethson, T. and Johansson, Sveneric and Hartman, Henrik and Gull, T. R.},
  issn         = {0004-6361},
  keyword      = {line: identification,circumstellar matter,stars: kinematics and,dynamics,stars: individual: eta Carinae},
  language     = {eng},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {eta Carinae: linelist for the emission spectrum of the Weigelt blobs in the 1700 to 10 400 angstrom wavelength region},
  url          = {http://dx.doi.org/10.1051/0004-6361/201116696},
  volume       = {540},
  year         = {2012},
}