Lithium abundance in cluster giants: constraints on meridional circulation transport on the main sequence
The observed Li abundances in giants are used here to constrain meridional circulation transport on the main sequence. It is shown how meridional circulation, operating over the main-sequence lifetime, can lead to Li depletion in the upper radiative envelope and eventually to extreme Li underabundan...
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| Veröffentlicht in: | The Astrophysical journal 1989-12, Vol.347 (2), p.821-834 |
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| container_end_page | 834 |
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| container_issue | 2 |
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| container_title | The Astrophysical journal |
| container_volume | 347 |
| creator | CHARBONNEAU, P MICHAUD, G PROFFITT, C. R |
| description | The observed Li abundances in giants are used here to constrain meridional circulation transport on the main sequence. It is shown how meridional circulation, operating over the main-sequence lifetime, can lead to Li depletion in the upper radiative envelope and eventually to extreme Li underabundance in first-ascent giants, following convective dilution on the lower giant branch. In the mass range 1.2-2.0 solar, stars with equatorial rotational velocities greater than 30-35 km/s on the ZAMS should destroy most of their Li. These result are compared to recent Li abundance determination in three moderately old clusters, NGC 7789, NGC 752, and M67. Reasonably good agreement is found with data on M67 and NGC 752, but surprising disagreement with data on NGC 7789 is found. Possible explanations are considered. 60 refs. |
| doi_str_mv | 10.1086/168172 |
| format | Article |
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R</creatorcontrib><title>Lithium abundance in cluster giants: constraints on meridional circulation transport on the main sequence</title><title>The Astrophysical journal</title><description>The observed Li abundances in giants are used here to constrain meridional circulation transport on the main sequence. It is shown how meridional circulation, operating over the main-sequence lifetime, can lead to Li depletion in the upper radiative envelope and eventually to extreme Li underabundance in first-ascent giants, following convective dilution on the lower giant branch. In the mass range 1.2-2.0 solar, stars with equatorial rotational velocities greater than 30-35 km/s on the ZAMS should destroy most of their Li. These result are compared to recent Li abundance determination in three moderately old clusters, NGC 7789, NGC 752, and M67. Reasonably good agreement is found with data on M67 and NGC 752, but surprising disagreement with data on NGC 7789 is found. Possible explanations are considered. 60 refs.</description><subject>640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources</subject><subject>ABUNDANCE</subject><subject>ALKALI METALS</subject><subject>ANGULAR MOMENTUM</subject><subject>Astronomy</subject><subject>ATMOSPHERES</subject><subject>CARBON 13</subject><subject>CARBON ISOTOPES</subject><subject>CHEMICAL COMPOSITION</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>Earth, ocean, space</subject><subject>ELEMENT ABUNDANCE</subject><subject>ELEMENTS</subject><subject>EVEN-ODD NUCLEI</subject><subject>Exact sciences and technology</subject><subject>Giant and subgiant stars</subject><subject>GIANT STARS</subject><subject>ISOTOPES</subject><subject>LIGHT NUCLEI</subject><subject>LITHIUM</subject><subject>MAIN SEQUENCE STARS</subject><subject>MASS TRANSFER</subject><subject>MATHEMATICAL MODELS</subject><subject>METALS</subject><subject>MOTION</subject><subject>Normal stars (by class): general or individual</subject><subject>NUCLEI</subject><subject>ROTATION</subject><subject>STABLE ISOTOPES</subject><subject>STAR CLUSTERS</subject><subject>STAR EVOLUTION</subject><subject>STAR MODELS</subject><subject>STARS</subject><subject>STELLAR ATMOSPHERES</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNo9kE1LxDAURYMoOI76G4KIu2oymaSJOxG_YMCNgrvy-po4kTYdk3ThvzdDxdXjwHkX7iXknLNrzrS64UrzenVAFlwKXa2FrA_JgjG2rpSoP47JSUpfe1wZsyB-4_PWTwOFdgodBLTUB4r9lLKN9NNDyOmW4hhSjuAL0DHQwUbf-TFAT9FHnHrIhWgxQtqNMe-dvLV0KB802e_JltxTcuSgT_bs7y7J--PD2_1ztXl9erm_21S4YiZX2AJDoYyVYFvNnJDOGlZASMb02kjHsG07xxFdi8J1RjEOVgOCqnnxl-Rizh1T9k1Cny1uS4FgMTc1N8IYWaSrWcI4phSta3bRDxB_Gs6a_YrNvGIRL2dxBwmhd6Ui-vRvK6WNNkz8AvSPc60</recordid><startdate>19891201</startdate><enddate>19891201</enddate><creator>CHARBONNEAU, P</creator><creator>MICHAUD, G</creator><creator>PROFFITT, C. R</creator><general>University of Chicago Press</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19891201</creationdate><title>Lithium abundance in cluster giants: constraints on meridional circulation transport on the main sequence</title><author>CHARBONNEAU, P ; MICHAUD, G ; PROFFITT, C. R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c209t-cba0c369e5aeb80f35fe905ae35008495f0cbbdf1ccfbc3fd9601ae8aca6710f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1989</creationdate><topic>640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources</topic><topic>ABUNDANCE</topic><topic>ALKALI METALS</topic><topic>ANGULAR MOMENTUM</topic><topic>Astronomy</topic><topic>ATMOSPHERES</topic><topic>CARBON 13</topic><topic>CARBON ISOTOPES</topic><topic>CHEMICAL COMPOSITION</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>Earth, ocean, space</topic><topic>ELEMENT ABUNDANCE</topic><topic>ELEMENTS</topic><topic>EVEN-ODD NUCLEI</topic><topic>Exact sciences and technology</topic><topic>Giant and subgiant stars</topic><topic>GIANT STARS</topic><topic>ISOTOPES</topic><topic>LIGHT NUCLEI</topic><topic>LITHIUM</topic><topic>MAIN SEQUENCE STARS</topic><topic>MASS TRANSFER</topic><topic>MATHEMATICAL MODELS</topic><topic>METALS</topic><topic>MOTION</topic><topic>Normal stars (by class): general or individual</topic><topic>NUCLEI</topic><topic>ROTATION</topic><topic>STABLE ISOTOPES</topic><topic>STAR CLUSTERS</topic><topic>STAR EVOLUTION</topic><topic>STAR MODELS</topic><topic>STARS</topic><topic>STELLAR ATMOSPHERES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>CHARBONNEAU, P</creatorcontrib><creatorcontrib>MICHAUD, G</creatorcontrib><creatorcontrib>PROFFITT, C. R</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>CHARBONNEAU, P</au><au>MICHAUD, G</au><au>PROFFITT, C. R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Lithium abundance in cluster giants: constraints on meridional circulation transport on the main sequence</atitle><jtitle>The Astrophysical journal</jtitle><date>1989-12-01</date><risdate>1989</risdate><volume>347</volume><issue>2</issue><spage>821</spage><epage>834</epage><pages>821-834</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>The observed Li abundances in giants are used here to constrain meridional circulation transport on the main sequence. It is shown how meridional circulation, operating over the main-sequence lifetime, can lead to Li depletion in the upper radiative envelope and eventually to extreme Li underabundance in first-ascent giants, following convective dilution on the lower giant branch. In the mass range 1.2-2.0 solar, stars with equatorial rotational velocities greater than 30-35 km/s on the ZAMS should destroy most of their Li. These result are compared to recent Li abundance determination in three moderately old clusters, NGC 7789, NGC 752, and M67. Reasonably good agreement is found with data on M67 and NGC 752, but surprising disagreement with data on NGC 7789 is found. Possible explanations are considered. 60 refs.</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/168172</doi><tpages>14</tpages></addata></record> |
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| ispartof | The Astrophysical journal, 1989-12, Vol.347 (2), p.821-834 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_osti_scitechconnect_7193995 |
| source | Alma/SFX Local Collection |
| subjects | 640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources ABUNDANCE ALKALI METALS ANGULAR MOMENTUM Astronomy ATMOSPHERES CARBON 13 CARBON ISOTOPES CHEMICAL COMPOSITION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Earth, ocean, space ELEMENT ABUNDANCE ELEMENTS EVEN-ODD NUCLEI Exact sciences and technology Giant and subgiant stars GIANT STARS ISOTOPES LIGHT NUCLEI LITHIUM MAIN SEQUENCE STARS MASS TRANSFER MATHEMATICAL MODELS METALS MOTION Normal stars (by class): general or individual NUCLEI ROTATION STABLE ISOTOPES STAR CLUSTERS STAR EVOLUTION STAR MODELS STARS STELLAR ATMOSPHERES |
| title | Lithium abundance in cluster giants: constraints on meridional circulation transport on the main sequence |
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