Lithium line variations in weak-lined T Tauri stars
We have observed seven weak-lined T Tauri stars to examine the effects of magnetic activity on the Li I 6707 A equivalent width and line profile. Six of the seven program stars were observed at least twice per evening on four consecutive nights. Variable Li I equivalent width is certainly present in...
Gespeichert in:
Veröffentlicht in: | The Astronomical journal 1993-04, Vol.105 (4), p.1519-1524 |
---|---|
Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | 1524 |
---|---|
container_issue | 4 |
container_start_page | 1519 |
container_title | The Astronomical journal |
container_volume | 105 |
creator | PATTERER, R. J RAMSEY, L HUENEMOERDER, D. P WELTY, A. D |
description | We have observed seven weak-lined T Tauri stars to examine the effects of magnetic activity on the Li I 6707 A equivalent width and line profile. Six of the seven program stars were observed at least twice per evening on four consecutive nights. Variable Li I equivalent width is certainly present in two targets, which are the only known binaries (single-lined spectroscopic) in our sample, and likely in three others. The amplitude of the variability is consistent with previous estimates of activity effects. The variability itself supports hypotheses that observed spread in Li I equivalent widths may be explained by magnetic activity. It is unclear whether or not the binary nature of our two detections is significant. We find no indication that similarity to RS CVn systems, other than rapid rotation, is responsible for the variable activity detected. (Author) |
doi_str_mv | 10.1086/116531 |
format | Article |
fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_26050692</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>26050692</sourcerecordid><originalsourceid>FETCH-LOGICAL-c313t-1737cd07747db9d9b041b0c99119dd92883c9d4fdb1e9377e005c4ba2eb3c57f3</originalsourceid><addsrcrecordid>eNpFkM1KxDAURoMoWEd9hizEXfXeJm2SpQw6CgNuxnVJkxSj_RlzW8W312EGXX3wcTiLw9glwg2Crm4Rq1LgEcuwFDoXWuMxywBA5lVRVqfsjOgNAFGDzJhYx-k1zj3v4hD4p03RTnEciMeBfwX7nu9-zzd8Y-cUOU020Tk7aW1H4eKwC_bycL9ZPubr59XT8m6dO4FiylEJ5TwoJZVvjDcNSGzAGYNovDeF1sIZL1vfYDBCqQBQOtnYIjTClaoVC3a9927T-DEHmuo-kgtdZ4cwzlQXFZRQmeIfdGkkSqGttyn2Nn3XCPWuSb1v8gteHYyWnO3aZAcX6Y-WCrTSIH4Aex5eKQ</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>26050692</pqid></control><display><type>article</type><title>Lithium line variations in weak-lined T Tauri stars</title><source>EZB-FREE-00999 freely available EZB journals</source><source>Alma/SFX Local Collection</source><creator>PATTERER, R. J ; RAMSEY, L ; HUENEMOERDER, D. P ; WELTY, A. D</creator><creatorcontrib>PATTERER, R. J ; RAMSEY, L ; HUENEMOERDER, D. P ; WELTY, A. D</creatorcontrib><description>We have observed seven weak-lined T Tauri stars to examine the effects of magnetic activity on the Li I 6707 A equivalent width and line profile. Six of the seven program stars were observed at least twice per evening on four consecutive nights. Variable Li I equivalent width is certainly present in two targets, which are the only known binaries (single-lined spectroscopic) in our sample, and likely in three others. The amplitude of the variability is consistent with previous estimates of activity effects. The variability itself supports hypotheses that observed spread in Li I equivalent widths may be explained by magnetic activity. It is unclear whether or not the binary nature of our two detections is significant. We find no indication that similarity to RS CVn systems, other than rapid rotation, is responsible for the variable activity detected. (Author)</description><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.1086/116531</identifier><identifier>CODEN: ANJOAA</identifier><language>eng</language><publisher>Chicago, IL: University of Chicago Press</publisher><subject>Astronomy ; Earth, ocean, space ; Exact sciences and technology ; Pre-main sequence objects, young stellar objects (yso's) and protostars (t tauri stars, orion population, herbig-haro objects, bok globules, bipolar outflows, cometary nebulae, etc.) ; Stars</subject><ispartof>The Astronomical journal, 1993-04, Vol.105 (4), p.1519-1524</ispartof><rights>1993 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c313t-1737cd07747db9d9b041b0c99119dd92883c9d4fdb1e9377e005c4ba2eb3c57f3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4708780$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>PATTERER, R. J</creatorcontrib><creatorcontrib>RAMSEY, L</creatorcontrib><creatorcontrib>HUENEMOERDER, D. P</creatorcontrib><creatorcontrib>WELTY, A. D</creatorcontrib><title>Lithium line variations in weak-lined T Tauri stars</title><title>The Astronomical journal</title><description>We have observed seven weak-lined T Tauri stars to examine the effects of magnetic activity on the Li I 6707 A equivalent width and line profile. Six of the seven program stars were observed at least twice per evening on four consecutive nights. Variable Li I equivalent width is certainly present in two targets, which are the only known binaries (single-lined spectroscopic) in our sample, and likely in three others. The amplitude of the variability is consistent with previous estimates of activity effects. The variability itself supports hypotheses that observed spread in Li I equivalent widths may be explained by magnetic activity. It is unclear whether or not the binary nature of our two detections is significant. We find no indication that similarity to RS CVn systems, other than rapid rotation, is responsible for the variable activity detected. (Author)</description><subject>Astronomy</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Pre-main sequence objects, young stellar objects (yso's) and protostars (t tauri stars, orion population, herbig-haro objects, bok globules, bipolar outflows, cometary nebulae, etc.)</subject><subject>Stars</subject><issn>0004-6256</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNpFkM1KxDAURoMoWEd9hizEXfXeJm2SpQw6CgNuxnVJkxSj_RlzW8W312EGXX3wcTiLw9glwg2Crm4Rq1LgEcuwFDoXWuMxywBA5lVRVqfsjOgNAFGDzJhYx-k1zj3v4hD4p03RTnEciMeBfwX7nu9-zzd8Y-cUOU020Tk7aW1H4eKwC_bycL9ZPubr59XT8m6dO4FiylEJ5TwoJZVvjDcNSGzAGYNovDeF1sIZL1vfYDBCqQBQOtnYIjTClaoVC3a9927T-DEHmuo-kgtdZ4cwzlQXFZRQmeIfdGkkSqGttyn2Nn3XCPWuSb1v8gteHYyWnO3aZAcX6Y-WCrTSIH4Aex5eKQ</recordid><startdate>19930401</startdate><enddate>19930401</enddate><creator>PATTERER, R. J</creator><creator>RAMSEY, L</creator><creator>HUENEMOERDER, D. P</creator><creator>WELTY, A. D</creator><general>University of Chicago Press</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>19930401</creationdate><title>Lithium line variations in weak-lined T Tauri stars</title><author>PATTERER, R. J ; RAMSEY, L ; HUENEMOERDER, D. P ; WELTY, A. D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c313t-1737cd07747db9d9b041b0c99119dd92883c9d4fdb1e9377e005c4ba2eb3c57f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Astronomy</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Pre-main sequence objects, young stellar objects (yso's) and protostars (t tauri stars, orion population, herbig-haro objects, bok globules, bipolar outflows, cometary nebulae, etc.)</topic><topic>Stars</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>PATTERER, R. J</creatorcontrib><creatorcontrib>RAMSEY, L</creatorcontrib><creatorcontrib>HUENEMOERDER, D. P</creatorcontrib><creatorcontrib>WELTY, A. D</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>PATTERER, R. J</au><au>RAMSEY, L</au><au>HUENEMOERDER, D. P</au><au>WELTY, A. D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Lithium line variations in weak-lined T Tauri stars</atitle><jtitle>The Astronomical journal</jtitle><date>1993-04-01</date><risdate>1993</risdate><volume>105</volume><issue>4</issue><spage>1519</spage><epage>1524</epage><pages>1519-1524</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><coden>ANJOAA</coden><abstract>We have observed seven weak-lined T Tauri stars to examine the effects of magnetic activity on the Li I 6707 A equivalent width and line profile. Six of the seven program stars were observed at least twice per evening on four consecutive nights. Variable Li I equivalent width is certainly present in two targets, which are the only known binaries (single-lined spectroscopic) in our sample, and likely in three others. The amplitude of the variability is consistent with previous estimates of activity effects. The variability itself supports hypotheses that observed spread in Li I equivalent widths may be explained by magnetic activity. It is unclear whether or not the binary nature of our two detections is significant. We find no indication that similarity to RS CVn systems, other than rapid rotation, is responsible for the variable activity detected. (Author)</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/116531</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0004-6256 |
ispartof | The Astronomical journal, 1993-04, Vol.105 (4), p.1519-1524 |
issn | 0004-6256 1538-3881 |
language | eng |
recordid | cdi_proquest_miscellaneous_26050692 |
source | EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
subjects | Astronomy Earth, ocean, space Exact sciences and technology Pre-main sequence objects, young stellar objects (yso's) and protostars (t tauri stars, orion population, herbig-haro objects, bok globules, bipolar outflows, cometary nebulae, etc.) Stars |
title | Lithium line variations in weak-lined T Tauri stars |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-04T22%3A52%3A50IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Lithium%20line%20variations%20in%20weak-lined%20T%20Tauri%20stars&rft.jtitle=The%20Astronomical%20journal&rft.au=PATTERER,%20R.%20J&rft.date=1993-04-01&rft.volume=105&rft.issue=4&rft.spage=1519&rft.epage=1524&rft.pages=1519-1524&rft.issn=0004-6256&rft.eissn=1538-3881&rft.coden=ANJOAA&rft_id=info:doi/10.1086/116531&rft_dat=%3Cproquest_cross%3E26050692%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=26050692&rft_id=info:pmid/&rfr_iscdi=true |