Release 11.12 ("Hergest Ridge")
Release 11.12 ("Hergest Ridge")
| Article ID: gc512 | |
| Author | Lardo, C.; Mucciarelli, A.; Bastian, N. |
| Title | The iron dispersion of the globular cluster M2, revised |
| Journal | MNRAS, Volume 457, Issue 1, p.51-63 |
| Year of publication | 2016 (on gclusters from 2016-03-22 11:46:43 ) |
| Abstract | M2 has been claimed to possess three distinct stellar components that are enhanced in iron relative to each other. We use equivalent width measurements from 14 red giant branch stars (...) e perform the chemical analysis using three different methods to constrain effective temperatures and surface gravities. When atmospheric parameters are derived spectroscopically, we measure a trimodal metallicity distribution (...) We find that the metallicity distribution from Fe II lines strongly differs from the distribution obtained from Fe I features when photometric gravities are adopted.(...) M2 is composed by a dominant population (around 99 per cent) homogeneous in iron and a minority component (around 1 per cent) enriched in iron with respect to the main cluster population. |
| Tags | NGC 7089 |
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