SIMBAD references

2015A&A...578A.116C - Astronomy and Astrophysics, volume 578A, 116-116 (2015/6-1)

The normal chemistry of multiple stellar populations in the dense globular cluster NGC 6093 (M 80).

CARRETTA E., BRAGAGLIA A., GRATTON R.G., D'ORAZI V., LUCATELLO S., SOLLIMA A., MOMANY Y., CATANZARO G. and LEONE F.

Abstract (from CDS):

We present the abundance analysis of 82 red giant branch stars in the dense, metal-poor globular cluster NGC 6093 (M 80), the largest sample of stars analysed in this way for this cluster. From high-resolution UVES spectra of 14 stars and intermediate resolution GIRAFFE spectra for the other stars we derived abundances of O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, Eu. On our UVES metallicity scale the mean metal abundance of M 80 is [Fe/H]=-1.791±0.006±0.076 (±statistical ±systematic error) with σ=0.023 (14 stars). M 80 shows star-to-star variations in proton-capture elements, and the extension of the Na-O anti-correlation perfectly fit the relations with (i) total cluster mass; (ii) horizontal branch morphology; and (iii) cluster concentration previously found by our group. The chemistry of multiple stellar populations in M 80 does not look extreme. The cluster is also a representative of halo globular clusters concerning the pattern of α-capture and Fe-group elements. However we found that a significant contribution from the s-process is required to account for the distribution of neutron-capture elements. A minority of stars in M 80 seem to exhibit slightly enhanced abundances of s-process species, compatible with those observed in M 22 and NGC 1851, although further confirmation from larger samples is required.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: Population II - globular clusters: general - globular clusters: individual: NGC 6093 (M 80) - stars: atmospheres

VizieR on-line data: <Available at CDS (J/A+A/578/A116): table2.dat table3.dat table5.dat table6.dat table7.dat table8.dat table9.dat>

Nomenclature: Tables 2-3,5-9: [CBG2015] NNNNN N=143 among (Nos 208-22172).

Simbad objects: 165

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2015A&A...578A.116C and select 'bookmark this link' or equivalent in the popup menu


2021.06.14-21:44:49

© Université de Strasbourg/CNRS

    • Contact