NO HEAVY-ELEMENT DISPERSION IN THE GLOBULAR CLUSTER M92

Journal Article · Thu Oct 20 00:00:00 EDT 2011 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/740/2/L38· OSTI ID:21565379

Cohen, Judith G., E-mail: [e-mail] ^[1]

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1. Palomar Observatory, Mail Stop 249-17, California Institute of Technology, Pasadena, CA 91125 (United States)

Although there have been recent claims that there is a large dispersion in the abundances of the heavy neutron capture elements in the old Galactic globular cluster M92, we show that the measured dispersion for the absolute abundances of four of the rare earth elements within a sample of 12 luminous red giants in M92 ({<=}0.07 dex) does not exceed the relevant sources of uncertainty. As expected from previous studies, the heavy elements show the signature of the r-process. Their abundance ratios are essentially identical to those of M30, another nearby globular cluster of similar metallicity.

• OSTI ID: 21565379
• Journal Information: Astrophysical Journal Letters, Vol. 740, Issue 2; Other Information: DOI: 10.1088/2041-8205/740/2/L38; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ELEMENT ABUNDANCE
GALAXY CLUSTERS
NEUTRON REACTIONS
RARE EARTHS
ABUNDANCE
BARYON REACTIONS
ELEMENTS
HADRON REACTIONS
METALS
NUCLEAR REACTIONS
NUCLEON REACTIONS