Skip to main content Accessibility help
×
Home
Hostname: page-component-78bd46657c-j4m62 Total loading time: 0.201 Render date: 2021-05-09T13:29:26.107Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

On the circumstellar effects on the Li and Ca abundances in massive Galactic O-rich AGB stars

Published online by Cambridge University Press:  30 December 2019

V. Pérez-Mesa
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38206 La Laguna, Tenerife, Spain email: vperezme@iac.es Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
O. Zamora
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38206 La Laguna, Tenerife, Spain email: vperezme@iac.es Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
D. A. García-Hernández
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38206 La Laguna, Tenerife, Spain email: vperezme@iac.es Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
Y. Ossorio
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38206 La Laguna, Tenerife, Spain email: vperezme@iac.es Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
T. Masseron
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38206 La Laguna, Tenerife, Spain email: vperezme@iac.es Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain
B. Plez
Affiliation:
Laboratoire Univers et Particules de Montpellier, Université de Montpellier2, CNRS, 34095 Montpellier, France
A. Manchado
Affiliation:
Instituto de Astrofísica de Canarias (IAC), E-38206 La Laguna, Tenerife, Spain email: vperezme@iac.es Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain Consejo Superior de Investigaciones Científicas (CSIC), E-28006 Madrid, Spain
A. I. Karakas
Affiliation:
Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, VIC3800, Australia
M. Lugaro
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, 1121 Budapest, Hungary
Corresponding
E-mail address:

Abstract

We explore the circumstellar effects on the Li and Ca abundances determination in a complete sample of massive Galactic AGB stars. The Li abundance is an indicator of the hot bottom burning (HBB) activation, while the total Ca abundance could be affected by overproduction of the short-lived radionuclide 41Ca by the s-process. Li abundances were previously studied with hydrostatic models, while Ca abundances are determined here for the first time. The pseudo-dynamical abundances of Li and Ca are very similar to the hydrostatic ones, indicating that circumstellar effects are almost negligible. The new Li abundances confirm the (super-)Li-rich character of the sample Li-detected stars, supporting the HBB activation in massive Galactic AGB stars. Most sample stars display nearly solar Ca abundances that are consistent with predictions from the s-process nucleosynthesis models. A minority of the sample stars show a significant Ca depletion. Possible reasons for their (unexpected) low Ca content are given.

Type
Contributed Papers
Copyright
© International Astronomical Union 2019 

Access options

Get access to the full version of this content by using one of the access options below.

References

Cristallo, S., Straniero, O., Piersanti, L., & Gobrecht, D., 2015, ApJs, 219, 40 CrossRefGoogle Scholar
García-Hernández, D. A., García-Lario, P., Plez, B., et al., 2006, Science, 314, 1751 CrossRefGoogle Scholar
García-Hernández, D. A., García-Lario, P., Plez, B., et al., 2007, A&A, 462, 711 Google Scholar
García-Hernández, D. A., Zamora, O., Yagüe, A., et al., 2013, A&A, 555, L3 Google Scholar
Karakas, A. I., & Lugaro, M., 2016, ApJ, 825, 26 CrossRefGoogle Scholar
Pérez-Mesa, V., Zamora, O., García-Hernández, D. A., et al., 2017, A&A, 606, A20 Google Scholar
Pérez-Mesa, V., Zamora, O., García-Hernández, D. A., et al., 2018, in prep.Google Scholar
Ventura, P., & D’Antona, F., 2009, A&A, 499, 835 Google Scholar
Zamora, O., García-Hernández, D. A., Plez, B., & Manchado, A., 2014, A&A, 564, L4 Google Scholar

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

On the circumstellar effects on the Li and Ca abundances in massive Galactic O-rich AGB stars
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

On the circumstellar effects on the Li and Ca abundances in massive Galactic O-rich AGB stars
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

On the circumstellar effects on the Li and Ca abundances in massive Galactic O-rich AGB stars
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *