Skip to main content Accessibility help
×
Home
Hostname: page-component-55b6f6c457-hjh89 Total loading time: 0.19 Render date: 2021-09-25T07:55:45.087Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true, "newUsageEvents": true }

Does 3rd dredge-up reduce AGB mass-loss?

Published online by Cambridge University Press:  30 December 2019

Stefan Uttenthaler
Affiliation:
Kuffner Observatory, Johann-Staud-Straße 10, 1160 Vienna, Austria email: stefan.uttenthaler@gmail.com
Iain McDonald
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, Manchester, M13 9PL, UK
Klaus Bernhard
Affiliation:
Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V. (BAV), Berlin, Germany American Association of Variable Star Observers (AAVSO), Cambridge, MA, USA
Sergio Cristallo
Affiliation:
INAF – Osservatorio Astronomico, 64100Italy INFN – Sezione di Perugia, Italy
David Gobrecht
Affiliation:
Instituut voor Sterrenkunde, Celestijnenlaan 200D, bus 2401, 3001 Leuven, Belgium
Rights & Permissions[Opens in a new window]

Abstract

HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We follow up on a previous finding that Miras containing the third dredge-up (3DUP) indicator technetium (Tc) in their atmosphere form a different sequence of K – [22] colour as a function of pulsation period than Miras without Tc. A near-to-mid-infrared colour such as K – [22] is a good probe for the dust mass-loss rate (MLR) of these AGB stars. Contrary to what one might naïvely expect, Tc-poor Miras show redderK – [22] colours (i.e. higher dust MLRs) than Tc-rich Miras at a given period. In the follow-up work, the previous sample is extended and the analysis is expanded towards other colours and ISO dust spectra to check if the previous finding is due to a specific dust feature in the 22 μm band. We also investigate if the same two sequences can be revealed in the gas MLR. Different hypotheses to explain the observation of two sequences in the P vs. K – [22] diagram are discussed and tested, but so far none of them convincingly explains the observations.

Type
Contributed Papers
Copyright
© International Astronomical Union 2019 

References

Feast, M.W. 1963, MNRAS, 125, 367 CrossRefGoogle Scholar
Glassgold, A.E. 1995, ApJ, 438, L111 CrossRefGoogle Scholar
Riebel, D., Boyer, M.L., Srinivasan, S., et al. 2015, ApJ, 807, 1 CrossRefGoogle Scholar
Scholz, M., Ireland, M.J., & Wood, P.R. 2014, A&A, 565, A119 Google Scholar
Uttenthaler, S. 2013, A&A, 556, A38 Google Scholar
Uttenthaler, S., McDonald, I., Bernhard, K., et al. 2018, submitted to A&A Google Scholar
You have Access

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.

Does 3rd dredge-up reduce AGB mass-loss?
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.

Does 3rd dredge-up reduce AGB mass-loss?
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.

Does 3rd dredge-up reduce AGB mass-loss?
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *