Photometric period and rotational brightness modulation of V833 Tau
Photometric data covering 1994–2009, obtained at the Crimean Astrophysical Observatory or retrieved from the ASAS and SuperWASP catalogs, were used to analyze the brightness variations of the rapidly rotating star V833 Tau, whose activity level is close to saturation. Combined with previously publis...
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| Veröffentlicht in: | Astronomy reports 2017-02, Vol.61 (2), p.130-137 |
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| creator | Bondar’, N. I. |
| description | Photometric data covering 1994–2009, obtained at the Crimean Astrophysical Observatory or retrieved from the ASAS and SuperWASP catalogs, were used to analyze the brightness variations of the rapidly rotating star V833 Tau, whose activity level is close to saturation. Combined with previously published results, these data represent for the first time all stages in the development of the star’s 19- year activity cycle. The photometric period and rotational-modulation amplitude for different epochs are determined, and the qualitative pattern of the spots is considered. The photometric period is close to the orbital period, but always exceeds it, indicating that surface inhomogeneities are located far from the equatorial plane. With the high spottedness of the star, reaching 28% at the cycle maximum, the rotationalmodulation amplitude is 0.05−0.1
m
, and increases during the growth and decline phases of the 19-year cycle. The rotational modulation is due to spots with higher latitudes than in the case of the Sun, and concentrating on active longitudes. |
| doi_str_mv | 10.1134/S1063772917010024 |
| format | Article |
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m
, and increases during the growth and decline phases of the 19-year cycle. The rotational modulation is due to spots with higher latitudes than in the case of the Sun, and concentrating on active longitudes.</description><identifier>ISSN: 1063-7729</identifier><identifier>EISSN: 1562-6881</identifier><identifier>DOI: 10.1134/S1063772917010024</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Amplitudes ; Astronomy ; Astrophysics ; Brightness ; Longitude ; Modulation ; Observations and Techniques ; Photometry ; Physics ; Physics and Astronomy ; Spots ; Stars ; Stars & galaxies ; Stellar rotation</subject><ispartof>Astronomy reports, 2017-02, Vol.61 (2), p.130-137</ispartof><rights>Pleiades Publishing, Ltd. 2017</rights><rights>Astronomy Reports is a copyright of Springer, 2017.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c382t-65d0abd58b448ff86585c6827c347a8b6a0116873be73987a49c46acef37d3c63</citedby><cites>FETCH-LOGICAL-c382t-65d0abd58b448ff86585c6827c347a8b6a0116873be73987a49c46acef37d3c63</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S1063772917010024$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S1063772917010024$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Bondar’, N. I.</creatorcontrib><title>Photometric period and rotational brightness modulation of V833 Tau</title><title>Astronomy reports</title><addtitle>Astron. Rep</addtitle><description>Photometric data covering 1994–2009, obtained at the Crimean Astrophysical Observatory or retrieved from the ASAS and SuperWASP catalogs, were used to analyze the brightness variations of the rapidly rotating star V833 Tau, whose activity level is close to saturation. Combined with previously published results, these data represent for the first time all stages in the development of the star’s 19- year activity cycle. The photometric period and rotational-modulation amplitude for different epochs are determined, and the qualitative pattern of the spots is considered. The photometric period is close to the orbital period, but always exceeds it, indicating that surface inhomogeneities are located far from the equatorial plane. With the high spottedness of the star, reaching 28% at the cycle maximum, the rotationalmodulation amplitude is 0.05−0.1
m
, and increases during the growth and decline phases of the 19-year cycle. The rotational modulation is due to spots with higher latitudes than in the case of the Sun, and concentrating on active longitudes.</description><subject>Amplitudes</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Brightness</subject><subject>Longitude</subject><subject>Modulation</subject><subject>Observations and Techniques</subject><subject>Photometry</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Spots</subject><subject>Stars</subject><subject>Stars & galaxies</subject><subject>Stellar rotation</subject><issn>1063-7729</issn><issn>1562-6881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqNkU1LAzEQhoMoWKs_wFvAi5fVzOZrepTiFxQUrF6XbDbbbtluarJ78N-bth5EETzNMO_zvswwhJwDuwLg4voFmOJa5xPQDBjLxQEZgVR5phDhMPVJzrb6MTmJccUYAHI1ItPnpe_92vWhsXTjQuMrarqKBt-bvvGdaWkZmsWy71yMdO2rod3Nqa_pG3JO52Y4JUe1aaM7-6pj8np3O58-ZLOn-8fpzSyzHPM-U7JipqwklkJgXaOSKK3CXFsutMFSmbSUQs1Lp_kEtRETK5Sxrua64lbxMbnc526Cfx9c7It1E61rW9M5P8QCEAWAZCD-gWqdYM22qRc_0JUfQjp8RzGUUgpIFOwpG3yMwdXFJjRrEz4KYMX2A8WvDyRPvvfExHYLF74l_2n6BD_HhRo</recordid><startdate>20170201</startdate><enddate>20170201</enddate><creator>Bondar’, N. 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I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c382t-65d0abd58b448ff86585c6827c347a8b6a0116873be73987a49c46acef37d3c63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Amplitudes</topic><topic>Astronomy</topic><topic>Astrophysics</topic><topic>Brightness</topic><topic>Longitude</topic><topic>Modulation</topic><topic>Observations and Techniques</topic><topic>Photometry</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Spots</topic><topic>Stars</topic><topic>Stars & galaxies</topic><topic>Stellar rotation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bondar’, N. 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I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photometric period and rotational brightness modulation of V833 Tau</atitle><jtitle>Astronomy reports</jtitle><stitle>Astron. Rep</stitle><date>2017-02-01</date><risdate>2017</risdate><volume>61</volume><issue>2</issue><spage>130</spage><epage>137</epage><pages>130-137</pages><issn>1063-7729</issn><eissn>1562-6881</eissn><abstract>Photometric data covering 1994–2009, obtained at the Crimean Astrophysical Observatory or retrieved from the ASAS and SuperWASP catalogs, were used to analyze the brightness variations of the rapidly rotating star V833 Tau, whose activity level is close to saturation. Combined with previously published results, these data represent for the first time all stages in the development of the star’s 19- year activity cycle. The photometric period and rotational-modulation amplitude for different epochs are determined, and the qualitative pattern of the spots is considered. The photometric period is close to the orbital period, but always exceeds it, indicating that surface inhomogeneities are located far from the equatorial plane. With the high spottedness of the star, reaching 28% at the cycle maximum, the rotationalmodulation amplitude is 0.05−0.1
m
, and increases during the growth and decline phases of the 19-year cycle. The rotational modulation is due to spots with higher latitudes than in the case of the Sun, and concentrating on active longitudes.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S1063772917010024</doi><tpages>8</tpages></addata></record> |
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| subjects | Amplitudes Astronomy Astrophysics Brightness Longitude Modulation Observations and Techniques Photometry Physics Physics and Astronomy Spots Stars Stars & galaxies Stellar rotation |
| title | Photometric period and rotational brightness modulation of V833 Tau |
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