Thin and Thick Galactic Disks
Studies of elemental abundances in stars belonging to the thin and the thick disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence of [alpha/Fe] variations among F and G main sequence stars with the same [Fe/H] and interpreted these differences as due to radial gradients in...
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| creator | Nissen, Poul E |
| description | Studies of elemental abundances in stars belonging to the thin and the thick
disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence
of [alpha/Fe] variations among F and G main sequence stars with the same [Fe/H]
and interpreted these differences as due to radial gradients in the star
formation rate in the Galactic disk. Several recent studies suggest, however,
that the differences are mainly due to a separation in [alpha/Fe] between thin
and thick disk stars, indicating that these populations are discrete Galactic
components, as also found from several kinematical studies. Further evidence of
a chemical separation between the thick and the thin disk is obtained from
studies of [Mn/Fe] and the ratio between r- and s-process elements. The
interpretation of these new data in terms of formation scenarios and time
scales for the disk and halo components of our Galaxy is discussed. |
| doi_str_mv | 10.48550/arxiv.astro-ph/0310326 |
| format | Article |
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disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence
of [alpha/Fe] variations among F and G main sequence stars with the same [Fe/H]
and interpreted these differences as due to radial gradients in the star
formation rate in the Galactic disk. Several recent studies suggest, however,
that the differences are mainly due to a separation in [alpha/Fe] between thin
and thick disk stars, indicating that these populations are discrete Galactic
components, as also found from several kinematical studies. Further evidence of
a chemical separation between the thick and the thin disk is obtained from
studies of [Mn/Fe] and the ratio between r- and s-process elements. The
interpretation of these new data in terms of formation scenarios and time
scales for the disk and halo components of our Galaxy is discussed.</description><identifier>DOI: 10.48550/arxiv.astro-ph/0310326</identifier><language>eng</language><subject>Physics - Astrophysics of Galaxies ; Physics - Cosmology and Nongalactic Astrophysics ; Physics - Earth and Planetary Astrophysics ; Physics - High Energy Astrophysical Phenomena ; Physics - Instrumentation and Methods for Astrophysics ; Physics - Solar and Stellar Astrophysics</subject><creationdate>2003-10</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,885</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/astro-ph/0310326$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.astro-ph/0310326$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Nissen, Poul E</creatorcontrib><title>Thin and Thick Galactic Disks</title><description>Studies of elemental abundances in stars belonging to the thin and the thick
disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence
of [alpha/Fe] variations among F and G main sequence stars with the same [Fe/H]
and interpreted these differences as due to radial gradients in the star
formation rate in the Galactic disk. Several recent studies suggest, however,
that the differences are mainly due to a separation in [alpha/Fe] between thin
and thick disk stars, indicating that these populations are discrete Galactic
components, as also found from several kinematical studies. Further evidence of
a chemical separation between the thick and the thin disk is obtained from
studies of [Mn/Fe] and the ratio between r- and s-process elements. The
interpretation of these new data in terms of formation scenarios and time
scales for the disk and halo components of our Galaxy is discussed.</description><subject>Physics - Astrophysics of Galaxies</subject><subject>Physics - Cosmology and Nongalactic Astrophysics</subject><subject>Physics - Earth and Planetary Astrophysics</subject><subject>Physics - High Energy Astrophysical Phenomena</subject><subject>Physics - Instrumentation and Methods for Astrophysics</subject><subject>Physics - Solar and Stellar Astrophysics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotzr0OgjAUBeAuDkZ9BCOLI3DLbSmMxv_ExIWd3BYaGhAJGKNvL1Gnc4aTk4-xFYdAJFJCSP3LPQMaHv3d76oQkANG8ZQts8q1HrWFNxZTe0dqyDyc8XZuqIc5m1hqhnLxzxnLDvtse_Iv1-N5u7n4pNLYt9oKLBLJBZWoVCIpBR1xHQM3hoTUWERSaUBTYKx1CdIqS-MoFQikI5yx9e_2q8y73t2of-dfbd5V-V-LH_AAO_M</recordid><startdate>20031013</startdate><enddate>20031013</enddate><creator>Nissen, Poul E</creator><scope>GOX</scope></search><sort><creationdate>20031013</creationdate><title>Thin and Thick Galactic Disks</title><author>Nissen, Poul E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a796-fbf43d8514ae37785a90b21b601cca45b3d257b03cd36bbe05f7faa909430ab23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Physics - Astrophysics of Galaxies</topic><topic>Physics - Cosmology and Nongalactic Astrophysics</topic><topic>Physics - Earth and Planetary Astrophysics</topic><topic>Physics - High Energy Astrophysical Phenomena</topic><topic>Physics - Instrumentation and Methods for Astrophysics</topic><topic>Physics - Solar and Stellar Astrophysics</topic><toplevel>online_resources</toplevel><creatorcontrib>Nissen, Poul E</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Nissen, Poul E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thin and Thick Galactic Disks</atitle><date>2003-10-13</date><risdate>2003</risdate><abstract>Studies of elemental abundances in stars belonging to the thin and the thick
disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence
of [alpha/Fe] variations among F and G main sequence stars with the same [Fe/H]
and interpreted these differences as due to radial gradients in the star
formation rate in the Galactic disk. Several recent studies suggest, however,
that the differences are mainly due to a separation in [alpha/Fe] between thin
and thick disk stars, indicating that these populations are discrete Galactic
components, as also found from several kinematical studies. Further evidence of
a chemical separation between the thick and the thin disk is obtained from
studies of [Mn/Fe] and the ratio between r- and s-process elements. The
interpretation of these new data in terms of formation scenarios and time
scales for the disk and halo components of our Galaxy is discussed.</abstract><doi>10.48550/arxiv.astro-ph/0310326</doi><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics |
| title | Thin and Thick Galactic Disks |
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