Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments
Seismology of stars is strongly developing. To address this question we have formed an international collaboration, OPAC, to perform specific experimental measurements, compare opacity calculations, and improve the opacity calculations in stellar codes [1]. We consider the following opacity codes: S...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2013-11-01
|
| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20135914003 |
| _version_ | 1828946573208322048 |
|---|---|
| author | Gilles D. Turck-Chièze S. Busquet M. Thais F. Loisel G. Piau L. Ducret J.E. Blenski T. Blancard C. Cossé P. Faussurier G. Gilleron F. Pain J.C. Porcherot Q. Guzik J.A. Kilcrease D.P. Magee N.H. Harris J. Bastiani-Ceccotti S. Delahaye F. Zeippen C.J |
| author_facet | Gilles D. Turck-Chièze S. Busquet M. Thais F. Loisel G. Piau L. Ducret J.E. Blenski T. Blancard C. Cossé P. Faussurier G. Gilleron F. Pain J.C. Porcherot Q. Guzik J.A. Kilcrease D.P. Magee N.H. Harris J. Bastiani-Ceccotti S. Delahaye F. Zeippen C.J |
| author_sort | Gilles D. |
| collection | DOAJ |
| description | Seismology of stars is strongly developing. To address this question we have formed an international collaboration, OPAC, to perform specific experimental measurements, compare opacity calculations, and improve the opacity calculations in stellar codes [1]. We consider the following opacity codes: SCO, CASSANDRA, STA, OPAS, LEDCOP, OP, SCO-RCG. Their comparison has shown large differences for Fe and Ni in equivalent conditions of envelopes of type II supernova precursors, temperatures between 15 and 40 eV and densities of a few mg/cm3 [2–4]. LEDCOP, OPAS, SCO-RCG structure codes and STA give similar results and differ from OP ones for the lower temperatures and for spectral interval values [3]. In this work we discuss the role of Configuration Interaction (CI) and the influence of the number of used configurations. We present and include in the opacity code comparisons new HULLAC-v9 calculations [5, 6] that include full CI. To illustrate the importance of this effect we compare different CI approximations (modes) available in HULLAC-v9 [7]. These results are compared to previous predictions and to experimental data. Differences with OP results are discussed. |
| first_indexed | 2024-12-14T05:13:16Z |
| format | Article |
| id | doaj.art-74fa6d418ba246cf9247acc8473f362b |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T05:13:16Z |
| publishDate | 2013-11-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-74fa6d418ba246cf9247acc8473f362b2022-12-21T23:15:54ZengEDP SciencesEPJ Web of Conferences2100-014X2013-11-01591400310.1051/epjconf/20135914003Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experimentsGilles D.Turck-Chièze S.Busquet M.Thais F.Loisel G.Piau L.Ducret J.E.Blenski T.Blancard C.Cossé P.Faussurier G.Gilleron F.Pain J.C.Porcherot Q.Guzik J.A.Kilcrease D.P.Magee N.H.Harris J.Bastiani-Ceccotti S.Delahaye F.Zeippen C.JSeismology of stars is strongly developing. To address this question we have formed an international collaboration, OPAC, to perform specific experimental measurements, compare opacity calculations, and improve the opacity calculations in stellar codes [1]. We consider the following opacity codes: SCO, CASSANDRA, STA, OPAS, LEDCOP, OP, SCO-RCG. Their comparison has shown large differences for Fe and Ni in equivalent conditions of envelopes of type II supernova precursors, temperatures between 15 and 40 eV and densities of a few mg/cm3 [2–4]. LEDCOP, OPAS, SCO-RCG structure codes and STA give similar results and differ from OP ones for the lower temperatures and for spectral interval values [3]. In this work we discuss the role of Configuration Interaction (CI) and the influence of the number of used configurations. We present and include in the opacity code comparisons new HULLAC-v9 calculations [5, 6] that include full CI. To illustrate the importance of this effect we compare different CI approximations (modes) available in HULLAC-v9 [7]. These results are compared to previous predictions and to experimental data. Differences with OP results are discussed.http://dx.doi.org/10.1051/epjconf/20135914003 |
| spellingShingle | Gilles D. Turck-Chièze S. Busquet M. Thais F. Loisel G. Piau L. Ducret J.E. Blenski T. Blancard C. Cossé P. Faussurier G. Gilleron F. Pain J.C. Porcherot Q. Guzik J.A. Kilcrease D.P. Magee N.H. Harris J. Bastiani-Ceccotti S. Delahaye F. Zeippen C.J Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments EPJ Web of Conferences |
| title | Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments |
| title_full | Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments |
| title_fullStr | Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments |
| title_full_unstemmed | Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments |
| title_short | Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments |
| title_sort | iron and nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments |
| url | http://dx.doi.org/10.1051/epjconf/20135914003 |
| work_keys_str_mv | AT gillesd ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT turckchiezes ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT busquetm ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT thaisf ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT loiselg ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT piaul ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT ducretje ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT blenskit ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT blancardc ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT cossep ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT faussurierg ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT gilleronf ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT painjc ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT porcherotq ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT guzikja ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT kilcreasedp ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT mageenh ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT harrisj ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT bastianiceccottis ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT delahayef ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments AT zeippencj ironandnickelspectralopacitycalculationsinconditionsrelevantforpulsatingstellarenvelopesandexperiments |