Gclusters :: Bibliographic item "gc508"

Release 11.12 ("Hergest Ridge")

Gclusters :: Bibliographic item "gc508"

Article ID: gc508

Author Sakari, Charli M. et al.

Title Detailed Chemical Abundances of Four Stars in the Unusual Globular Cluster Palomar 1
Journal The Astrophysical Journal, Volume 740, Issue 2, article id. 106, 22 pp.
Year of publication 2011 (on gclusters from 2015-12-17 11:09:09 )

Abstract Detailed chemical abundances for 21 elements are presented for four red giants in the anomalous outer halo globular cluster Palomar 1 (R GC = 17.2 kpc, Z = 3.6 kpc) using high-resolution (R = 36, 000) spectra from the High Dispersion Spectrograph on the Subaru Telescope. Pal 1 has long been considered unusual because of its low surface brightness, sparse red giant branch, young age, and its possible association with two extragalactic streams of stars. This paper shows that its chemistry further confirms its unusual nature. The mean metallicity of the four stars, [Fe/H] = -0.60 ± 0.01, is high for a globular cluster so far from the Galactic center, but is low for a typical open cluster. The [?/Fe] ratios, though in agreement with the Galactic stars within the 1? errors, agree best with the lower values in dwarf galaxies. No signs of the Na/O anticorrelation are detected in Pal 1, though Na appears to be marginally high in all four stars (...)

Tags Pal 1
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Article ID: gc508
Author	Sakari, Charli M. et al.
Title	Detailed Chemical Abundances of Four Stars in the Unusual Globular Cluster Palomar 1
Journal	The Astrophysical Journal, Volume 740, Issue 2, article id. 106, 22 pp.
Year of publication	2011 (on gclusters from 2015-12-17 11:09:09 )
Abstract	Detailed chemical abundances for 21 elements are presented for four red giants in the anomalous outer halo globular cluster Palomar 1 (R GC = 17.2 kpc, Z = 3.6 kpc) using high-resolution (R = 36, 000) spectra from the High Dispersion Spectrograph on the Subaru Telescope. Pal 1 has long been considered unusual because of its low surface brightness, sparse red giant branch, young age, and its possible association with two extragalactic streams of stars. This paper shows that its chemistry further confirms its unusual nature. The mean metallicity of the four stars, [Fe/H] = -0.60 ± 0.01, is high for a globular cluster so far from the Galactic center, but is low for a typical open cluster. The [?/Fe] ratios, though in agreement with the Galactic stars within the 1? errors, agree best with the lower values in dwarf galaxies. No signs of the Na/O anticorrelation are detected in Pal 1, though Na appears to be marginally high in all four stars (...)
Tags	Pal 1