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Disentangling the H...
Disentangling the Hercules stream
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- Bensby, T. (författare)
- University of Michigan
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- Oey, M. S. (författare)
- University of Michigan
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- Feltzing, S. (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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visa fler...
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- Gustafsson, Bengt (författare)
- Uppsala universitet,Uppsala University,Teoretisk astrofysik
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visa färre...
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(creator_code:org_t)
- American Astronomical Society, 2007
- 2007
- Engelska.
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 655:2, s. 89-92
- Relaterad länk:
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http://arxiv.org/PS_... (free)
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http://arxiv.org/PS_...
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https://lup.lub.lu.s...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Using high-resolution spectra of nearby F and G dwarf stars, we have investigated the detailed abundance and age structure of the Hercules stream. We find that the stars in the stream have a wide range of stellar ages, metallicities, and element abundances. By comparing to existing samples of stars in the solar neighborhood with kinematics typical of the Galactic thin and thick disks, we find that the properties of the Hercules stream distinctly separate into the abundance and age trends of the two disks. Hence, we find it unlikely that the Hercules stream is a unique Galactic stellar population but rather is a mixture of thin and thick disk stars. This points toward a dynamical origin for the Hercules stream, probably caused by the Galactic bar.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- stars : abundances
- neighborhood
- solar
- Galaxy : formation
- galaxy : disk
- Galaxy : evolution
- stars : kinematics
- Astronomy and astrophysics
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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