Chemical similarities between Galactic bulge and local thick disk red giant stars.pdf

下载文档

4
0
约2.87万字
约 5页
2017-04-06 发布于江苏
举报
版权申诉
保障服务

Chemical similarities between Galactic bulge and local thick disk red giant stars.pdf

1、本文档共5页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

Chemical similarities between Galactic bulge and local thick disk red giant stars

a r X i v : 0 8 0 4 .4 1 2 4 v 1 [ a s t r o - p h ] 2 5 A p r 2 0 0 8 Astronomy Astrophysics manuscript no. bulge c? ESO 2008 April 25, 2008 Letter to the Editor Chemical similarities between Galactic bulge and local thick disk red giant stars J. Mele?ndez 1,2 , M. Asplund 3 , A. Alves-Brito 4 , K. Cunha 5,6 , B. Barbuy 4 , M.S. Bessell 2 , C. Chiappini 7,8 , K.C. Freeman 2 , I. Ram??rez 9 , V.V. Smith 5 , and D. Yong 2 1 Centro de Astrof??sica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal 2 Research School of Astronomy and Astrophysics, The Australian National University, Cotter Road, Weston, ACT 2611, Australia 3 Max Planck Institute for Astrophysics, Postfach 1317, 85741 Garching, Germany 4 Universidade de Sa?o Paulo, IAG, Rua do Mata?o 1226, Cidade Universita?ria, Sa?o Paulo 05508-900, Brazil 5 National Optical Astronomy Observatory, Casilla 603, La Serena, Chile 6 On leave from Observato?rio Nacional, Rio de Janeiro, Brazil 7 Geneva Observatory, Ch. des Maillettes 51, 1290 Sauverny, Switzerland 8 OAT/INAF, Via Tiepolo 11, Trieste 34131, Italy 9 McDonald Observatory and Department of Astronomy, University of Texas, RLM 15.306, Austin, TX 78712-1083, USA Received: January 15, 2008; accepted: April 18, 2008 ABSTRACT Context. The evolution of the Milky Way bulge and its relationship with the other Galactic populations is still poorly understood. The bulge has been suggested to be either a merger-driven classical bulge or the product of a dynamical instability of the inner disk. Aims. To probe the star formation history, the initial mass function and stellar nucleosynthesis of the bulge, we performed an elemental abundance analysis of bulge red giant stars. We also completed an identical study of local thin disk, thick disk and halo giants to establish the chemical differences and similarities between the various populations. Methods. High-resolution infrared spectra of 19 bulge giants and 49 comparison giants in the solar neighborho