|
|
|
|
|
| ID:
742815.0,
MPI für Astronomie / Publikationen_mpia |
| The Pristine survey II: A sample of bright stars observed with FEROS |
| Authors: | Caffau, E.; Bonifacio, P.; Starkenburg, E.; Martin, N.; Youakim, K.; Henden, A. A.; González Hernández, J. I.; Aguado, D. S.; Prieto, C. A.; Venn, K.; Jablonka, P. | | Date of Publication (YYYY-MM-DD): | 2017 | | Title of Journal: | Astronomische Nachrichten | | Volume: | 338 | | Issue / Number: | 6 | | Start Page: | 686 | | End Page: | 695 | | Audience: | Not Specified | | Abstract / Description: | Extremely metal-poor (EMP) stars are old objects formed in the first Gyr of the Universe. They are rare and, to select them, the most successful strategy has been to build on large and low-resolution spectroscopic surveys. The combination of narrow- and broad band photometry provides a powerful and cheaper alternative to select metal-poor stars. The on-going Pristine Survey is adopting this strategy, conducting photometry with the CFHT MegaCam wide field imager and a narrow-band filter centred at 395.2 nm on the CaII-H and -K lines. In this paper we present the results of the spectroscopic follow-up conducted on a sample of 26 stars at the bright end of the magnitude range of the Survey (g<=15), using FEROS at the MPG/ESO 2.2 m telescope. From our chemical investigation on the sample, we conclude that this magnitude range is too bright to use the SDSS gri bands, which are typically saturated. Instead the Pristine photometry can be usefully combined with the APASS gri photometry to provide reliable metallicity estimates. | | External Publication Status: | published | | Document Type: | Article |
| Communicated by: | N. N. | | Affiliations: | MPI für Astronomie | | Identifiers: | ISSN:0004-6337
URL:http://adsabs.harvard.edu/abs/2017AN....338..686C
| |
|
|
|
The scope and number of records on eDoc is subject
to the collection policies defined by each institute
- see "info" button in the collection browse view.
|
|
Advanced