Imprints of fast-rotating massive stars in the Galactic Bulge

被引：0

作者：

Cristina Chiappini

Urs Frischknecht

Georges Meynet

Raphael Hirschi

Beatriz Barbuy

Marco Pignatari

Thibaut Decressin

André Maeder

机构：

[1] Astrophysikalisches Institut Potsdam,Department of Physics

[2] An der Sternwarte 16,undefined

[3] Geneva Observatory,undefined

[4] University of Geneva,undefined

[5] 51 Ch. des Maillettes,undefined

[6] Istituto Nazionale di Astrofisica,undefined

[7] Osservatorio Astronomico di Trieste,undefined

[8] Via G. B. Tiepolo 11,undefined

[9] University of Basel,undefined

[10] Klingelbergstrasse 82,undefined

[11] Astrophysics Group,undefined

[12] Keele University,undefined

[13] IPMU,undefined

[14] University of Tokyo,undefined

[15] Kashiwa,undefined

[16] University of São Paulo,undefined

[17] IAG,undefined

[18] Rua do Matão 1226,undefined

[19] Cidade Universitaria,undefined

来源：

Nature | 2011年 / 472卷

关键词：

D O I：

暂无

中图分类号：

学科分类号：

摘要：

NGC 6522, the oldest globular cluster in our Galaxy, probably witnessed the earliest phases of the chemical enrichment of the Universe, when massive stars formed soon after the Big Bang generated the 'metals' (elements heavier than helium) that were incorporated into the low-mass stars that have survived to the present. However, reported element abundances in stars from NGC 6522 provided contradictory evidence about the nature of the gas from which they were formed. A reanalysis of the earlier spectra, adding yttrium and strontium abundances and upper limits for carbon, points to a pattern of abundances best explained by the early presence of metal-poor fast-rotating massive stars. These 'spinstars' are prime candidates for recognition as the 'first stars' in the Universe.

引用

页码：454 / 457

页数：3

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