Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aj....136..614m&link_type=abstract
The Astronomical Journal, Volume 136, Issue 2, pp. 614-620 (2008).
Astronomy and Astrophysics
Astronomy
14
Globular Clusters: General, Globular Clusters: Individual: Arp 2: Terzan 8
Scientific paper
To compare the globular clusters (GCs) associated with the Sagittarius Galaxy (Sgr) we report the results obtained from new high-resolution spectra of red giant stars in Terzan 8 and Arp 2, collected with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph at Las Campanas Observatory. For Ter 8 we find [Fe I/H] = -2.37 ± 0.04 and [Fe II/H] = -2.30 ± 0.07, while for Arp 2 [Fe I/H] = -1.77 ± 0.04 and [Fe II/H] = -1.89 ± 0.07. Other elements, usually of interest, show the following results. For oxygen, we obtain [O/Fe] = 0.71 ± 0.17 for Ter 8 and [O/Fe] = 0.21 ± 0.22 for Arp 2. For the α-elements (Mg, Si, Ca, Ti), the mean values are 0farcs37 ± 0.14 dex for Ter 8 and 0.31 ± 0.11 for Arp 2. These values are not too different from the Galactic GCs at a similar [Fe/H] value. Regarding Cu, we find quite underabundant results for both clusters: [Cu/Fe] = -0.96 for Ter 8 and [Cu/Fe] = -0.93 for Arp 2. The heavy s-process elements Ba and Nd show no excesses in Ter 8 and Arp 2. Our only r-process element, Eu, shows an excess of 0.45 dex in Arp 2, based on the only useful line at 6645 Å.
McWilliam Andrew
Mottini Marta
Wallerstein George
No associations
LandOfFree
ARP 2 and Terzan 8: a Detailed Chemical Analysis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with ARP 2 and Terzan 8: a Detailed Chemical Analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ARP 2 and Terzan 8: a Detailed Chemical Analysis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1171809