Signatures of an Intermediate-Age Metal-Rich Bulge Population
(2012) Conference on the Galactic Archaeology - Near-Field Cosmology and the Formation of the Milky Way 458. p.203-204- Abstract
- We have determined detailed elemental abundances and stellar ages for a sample of now 38 microlensed dwarf and subgiant stars in the Galactic bulge. Stars with sub-solar metallicities are all old and have enhanced alpha-element abundances - very similar to what is seen for local thick disk stars. The metal-rich stars on the other hand show a wide variety of stellar ages, ranging from 3-4 Gyr to 12 Gyr, and an average around 7-8 Gyr. The existence of young and metal-rich stars are in conflict with recent photometric studies of the bulge which claim that the bulge only contains old stars.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3287967
- author
- organization
- publishing date
- 2012
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way (Astronomical Society of the Pacific Conference Series)
- volume
- 458
- pages
- 203 - 204
- publisher
- Astronomical Society of the Pacific (ASP)
- conference name
- Conference on the Galactic Archaeology - Near-Field Cosmology and the Formation of the Milky Way
- conference dates
- 2011-11-01 - 2011-11-04
- external identifiers
-
- wos:000309700000054
- ISBN
- 978-1-58381-798-8
- language
- English
- LU publication?
- yes
- id
- fd66e2fa-7878-4848-a7e3-bb05f1bcb567 (old id 3287967)
- date added to LUP
- 2016-04-04 10:02:07
- date last changed
- 2020-06-16 15:04:58
@inproceedings{fd66e2fa-7878-4848-a7e3-bb05f1bcb567, abstract = {{We have determined detailed elemental abundances and stellar ages for a sample of now 38 microlensed dwarf and subgiant stars in the Galactic bulge. Stars with sub-solar metallicities are all old and have enhanced alpha-element abundances - very similar to what is seen for local thick disk stars. The metal-rich stars on the other hand show a wide variety of stellar ages, ranging from 3-4 Gyr to 12 Gyr, and an average around 7-8 Gyr. The existence of young and metal-rich stars are in conflict with recent photometric studies of the bulge which claim that the bulge only contains old stars.}}, author = {{Bensby, Thomas and Feltzing, Sofia and Gould, A. and Johnson, J. A. and Asplund, M. and Adén, Daniel and Melendez, J. and Cohen, J. G. and Thompson, I. and Lucatello, S. and Gal-Yam, A.}}, booktitle = {{Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way (Astronomical Society of the Pacific Conference Series)}}, isbn = {{978-1-58381-798-8}}, language = {{eng}}, pages = {{203--204}}, publisher = {{Astronomical Society of the Pacific (ASP)}}, title = {{Signatures of an Intermediate-Age Metal-Rich Bulge Population}}, volume = {{458}}, year = {{2012}}, }