UBVRI monitoring of five late-type pre-main-sequence stars
Two T Tauri stars (DF Tau and DK Tau) and three pre-main-sequence K stars with weak line emission (WK X-Ray 1, WK X-Ray 2, and FK X-Ray 3) were monitored with UBVRI photometry over a 14-night period during October 1982. Neither T Tauri star shows an obvious rotational modulation in the light curve,...
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| Veröffentlicht in: | The Astronomical journal 1984-07, Vol.89, p.1015-1021 |
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| container_title | The Astronomical journal |
| container_volume | 89 |
| creator | Rydgren, A. E. Zak, D. S. Vrba, F. J. Chugainov, P. F. Zajtseva, G. V. |
| description | Two T Tauri stars (DF Tau and DK Tau) and three pre-main-sequence K stars with weak line emission (WK X-Ray 1, WK X-Ray 2, and FK X-Ray 3) were monitored with UBVRI photometry over a 14-night period during October 1982. Neither T Tauri star shows an obvious rotational modulation in the light curve, but DF Tau did experience a multi-day flare-like brightening similar to the events seen in this star by Zajtseva and Lyutyi (1976). The light variations of the three weak-emission stars are well described by sine curves with periods of 5.6, 2.8, and 7.0 days, respectively; these values presumably represent the axial rotation periods of these stars. The results provide further evidence for K-type pre-main-sequence stars which rotate at least as fast as T Tauri stars but lack strong line and continuum emission. |
| doi_str_mv | 10.1086/113597 |
| format | Article |
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E. ; Zak, D. S. ; Vrba, F. J. ; Chugainov, P. F. ; Zajtseva, G. V.</creator><creatorcontrib>Rydgren, A. E. ; Zak, D. S. ; Vrba, F. J. ; Chugainov, P. F. ; Zajtseva, G. V.</creatorcontrib><description>Two T Tauri stars (DF Tau and DK Tau) and three pre-main-sequence K stars with weak line emission (WK X-Ray 1, WK X-Ray 2, and FK X-Ray 3) were monitored with UBVRI photometry over a 14-night period during October 1982. Neither T Tauri star shows an obvious rotational modulation in the light curve, but DF Tau did experience a multi-day flare-like brightening similar to the events seen in this star by Zajtseva and Lyutyi (1976). The light variations of the three weak-emission stars are well described by sine curves with periods of 5.6, 2.8, and 7.0 days, respectively; these values presumably represent the axial rotation periods of these stars. The results provide further evidence for K-type pre-main-sequence stars which rotate at least as fast as T Tauri stars but lack strong line and continuum emission.</description><identifier>ISSN: 0004-6256</identifier><identifier>DOI: 10.1086/113597</identifier><language>eng</language><ispartof>The Astronomical journal, 1984-07, Vol.89, p.1015-1021</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c990-55cb13e91099fd6bb602a88ac65214413f9fe8b630e4b11881106c2c2bb176893</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27922,27923</link.rule.ids></links><search><creatorcontrib>Rydgren, A. E.</creatorcontrib><creatorcontrib>Zak, D. S.</creatorcontrib><creatorcontrib>Vrba, F. J.</creatorcontrib><creatorcontrib>Chugainov, P. F.</creatorcontrib><creatorcontrib>Zajtseva, G. V.</creatorcontrib><title>UBVRI monitoring of five late-type pre-main-sequence stars</title><title>The Astronomical journal</title><description>Two T Tauri stars (DF Tau and DK Tau) and three pre-main-sequence K stars with weak line emission (WK X-Ray 1, WK X-Ray 2, and FK X-Ray 3) were monitored with UBVRI photometry over a 14-night period during October 1982. Neither T Tauri star shows an obvious rotational modulation in the light curve, but DF Tau did experience a multi-day flare-like brightening similar to the events seen in this star by Zajtseva and Lyutyi (1976). The light variations of the three weak-emission stars are well described by sine curves with periods of 5.6, 2.8, and 7.0 days, respectively; these values presumably represent the axial rotation periods of these stars. 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V.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>198407</creationdate><title>UBVRI monitoring of five late-type pre-main-sequence stars</title><author>Rydgren, A. E. ; Zak, D. S. ; Vrba, F. J. ; Chugainov, P. F. ; Zajtseva, G. V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c990-55cb13e91099fd6bb602a88ac65214413f9fe8b630e4b11881106c2c2bb176893</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1984</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rydgren, A. E.</creatorcontrib><creatorcontrib>Zak, D. S.</creatorcontrib><creatorcontrib>Vrba, F. J.</creatorcontrib><creatorcontrib>Chugainov, P. F.</creatorcontrib><creatorcontrib>Zajtseva, G. V.</creatorcontrib><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>Rydgren, A. E.</au><au>Zak, D. S.</au><au>Vrba, F. J.</au><au>Chugainov, P. F.</au><au>Zajtseva, G. V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>UBVRI monitoring of five late-type pre-main-sequence stars</atitle><jtitle>The Astronomical journal</jtitle><date>1984-07</date><risdate>1984</risdate><volume>89</volume><spage>1015</spage><epage>1021</epage><pages>1015-1021</pages><issn>0004-6256</issn><abstract>Two T Tauri stars (DF Tau and DK Tau) and three pre-main-sequence K stars with weak line emission (WK X-Ray 1, WK X-Ray 2, and FK X-Ray 3) were monitored with UBVRI photometry over a 14-night period during October 1982. Neither T Tauri star shows an obvious rotational modulation in the light curve, but DF Tau did experience a multi-day flare-like brightening similar to the events seen in this star by Zajtseva and Lyutyi (1976). The light variations of the three weak-emission stars are well described by sine curves with periods of 5.6, 2.8, and 7.0 days, respectively; these values presumably represent the axial rotation periods of these stars. The results provide further evidence for K-type pre-main-sequence stars which rotate at least as fast as T Tauri stars but lack strong line and continuum emission.</abstract><doi>10.1086/113597</doi><tpages>7</tpages></addata></record> |
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| ispartof | The Astronomical journal, 1984-07, Vol.89, p.1015-1021 |
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| source | EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| title | UBVRI monitoring of five late-type pre-main-sequence stars |
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