Chemical compositions of RV tauri stars and related objects
We have undertaken a comprehensive abundance analysis for a sample of relatively unexplored RV Tauri and RV Tauri like stars to further our understanding of post-Asymptotic Giant Branch (post-AGB) evolution. From our study based on high resolution spectra and a grid of model atmospheres, we find indications of mild s-processing for V820 Cen and IRAS 06165+3158. On the other hand, SU Gem and BT Lac exhibit the effects of mild dust-gas winnowing. We have also compiled the existing abundance data on RV Tauri objects and find that a large fraction of them are afflicted by dust-gas winnowing and aided by the present work, we find a small group of two RV Tauris showing mild s-process enhancement in our Galaxy. With two out of three reported s-process enhanced objects belonging to RV Tauri spectroscopic class C, these intrinsically metal-poor objects appear to be promising candidates to analyse the possible s-processing in RV Tauri stars.
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Universidad Nacional Autónoma de México, Instituto de Astronomía
2014
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oai:scielo:S0185-110120140001000072014-05-19Chemical compositions of RV tauri stars and related objectsSumangala Rao,S.Giridhar,Sunetra stars/abundances stars/AGB and post-AGB stars/variables We have undertaken a comprehensive abundance analysis for a sample of relatively unexplored RV Tauri and RV Tauri like stars to further our understanding of post-Asymptotic Giant Branch (post-AGB) evolution. From our study based on high resolution spectra and a grid of model atmospheres, we find indications of mild s-processing for V820 Cen and IRAS 06165+3158. On the other hand, SU Gem and BT Lac exhibit the effects of mild dust-gas winnowing. We have also compiled the existing abundance data on RV Tauri objects and find that a large fraction of them are afflicted by dust-gas winnowing and aided by the present work, we find a small group of two RV Tauris showing mild s-process enhancement in our Galaxy. With two out of three reported s-process enhanced objects belonging to RV Tauri spectroscopic class C, these intrinsically metal-poor objects appear to be promising candidates to analyse the possible s-processing in RV Tauri stars.info:eu-repo/semantics/openAccessUniversidad Nacional Autónoma de México, Instituto de AstronomíaRevista mexicana de astronomía y astrofísica v.50 n.1 20142014-04-01info:eu-repo/semantics/articletext/htmlhttp://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012014000100007en |
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Sumangala Rao,S. Giridhar,Sunetra |
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Sumangala Rao,S. Giridhar,Sunetra Chemical compositions of RV tauri stars and related objects |
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Sumangala Rao,S. Giridhar,Sunetra |
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Sumangala Rao,S. |
title |
Chemical compositions of RV tauri stars and related objects |
title_short |
Chemical compositions of RV tauri stars and related objects |
title_full |
Chemical compositions of RV tauri stars and related objects |
title_fullStr |
Chemical compositions of RV tauri stars and related objects |
title_full_unstemmed |
Chemical compositions of RV tauri stars and related objects |
title_sort |
chemical compositions of rv tauri stars and related objects |
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We have undertaken a comprehensive abundance analysis for a sample of relatively unexplored RV Tauri and RV Tauri like stars to further our understanding of post-Asymptotic Giant Branch (post-AGB) evolution. From our study based on high resolution spectra and a grid of model atmospheres, we find indications of mild s-processing for V820 Cen and IRAS 06165+3158. On the other hand, SU Gem and BT Lac exhibit the effects of mild dust-gas winnowing. We have also compiled the existing abundance data on RV Tauri objects and find that a large fraction of them are afflicted by dust-gas winnowing and aided by the present work, we find a small group of two RV Tauris showing mild s-process enhancement in our Galaxy. With two out of three reported s-process enhanced objects belonging to RV Tauri spectroscopic class C, these intrinsically metal-poor objects appear to be promising candidates to analyse the possible s-processing in RV Tauri stars. |
publisher |
Universidad Nacional Autónoma de México, Instituto de Astronomía |
publishDate |
2014 |
url |
http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012014000100007 |
work_keys_str_mv |
AT sumangalaraos chemicalcompositionsofrvtauristarsandrelatedobjects AT giridharsunetra chemicalcompositionsofrvtauristarsandrelatedobjects |
_version_ |
1756220862869012480 |