Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-9dmbd Total loading time: 21.067 Render date: 2021-03-01T01:06:33.224Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

Exploring the vertical age structure of the Galactic disc

Published online by Cambridge University Press:  17 August 2016

Luca Casagrande
Affiliation:
Research School of Astronomy & Astrophysics, Mount Stromlo Observatory, The Australian National University, ACT 2611, Australia email: luca.casagrande@anu.edu.au
Corresponding
Rights & Permissions[Opens in a new window]

Abstract

While in external or high-redshift galaxies we can only measure integrated stellar properties at best, the Milky Way offers us the unique opportunity to study its individual baryonic components, including stars. We use oscillations measured in red giant stars by the Kepler satellite to derive stellar ages and explore the vertical age structure across few kpc of the Milky Way disc. We find that old stars dominate at increasing Galactic heights, whereas closer to the plane a rich zoology of ages exists. The age distribution of stars shows a smooth distribution over the last 10 Gyr, which together with a flat age-metallicity relation is consistent with a quiescent evolution for the Milky Way disc since a redshift of about two.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

Casagrande, L., Silva Aguirre, V., Stello, D., et al. 2014, ApJ, 787, 110 CrossRefGoogle Scholar
Casagrande, L., Silva Aguirre, V., Schlesinger, K. J., et al. 2015, MNRAS, in press.Google Scholar
Chaplin, W. J. & Miglio, A. 2013, ARA&A, 51, 353 CrossRefGoogle Scholar
van Dokkum, P. G., Leja, J., Nelson, E. J., et al. 2013, ApJ, 771, L35 CrossRefGoogle Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 76 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 1st March 2021. This data will be updated every 24 hours.

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.

Exploring the vertical age structure of the Galactic disc
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.

Exploring the vertical age structure of the Galactic disc
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.

Exploring the vertical age structure of the Galactic disc
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *