On the Origin of the Dichotomy of Stellar Activity Cycles
The presence of possible correlations between stellar rotation rate Ω and the frequency of the activity cycle ω cyc is still much debated. We implement a new Bayesian classification algorithm based on a simultaneous regression analysis of multiple scaling laws and we demonstrate the existence of two...
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| Veröffentlicht in: | Astrophysical journal. Letters 2022-11, Vol.939 (2), p.L26 |
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| container_title | Astrophysical journal. Letters |
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| creator | Bonanno, Alfio Corsaro, Enrico |
| description | The presence of possible correlations between stellar rotation rate Ω and the frequency of the activity cycle
ω
cyc
is still much debated. We implement a new Bayesian classification algorithm based on a simultaneous regression analysis of multiple scaling laws and we demonstrate the existence of two different scalings in the
log
10
ω
cyc
–
log
10
Ω
plane for an extended Mt. Wilson sample of 67 stars. Thanks to metallicity measurements obtained from both ESA Gaia and high-resolution spectroscopy, we argue that the origin of this dichotomy is likely related to the chemical composition: stars whose magnetic cycle frequency increases with rotation rate are less metallic than stars whose magnetic cycle frequency decreases with stellar rotation rates. On the contrary, no clear difference in chromospheric magnetic activity indicators characterizes the two branches. |
| doi_str_mv | 10.3847/2041-8213/ac9c05 |
| format | Article |
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ω
cyc
is still much debated. We implement a new Bayesian classification algorithm based on a simultaneous regression analysis of multiple scaling laws and we demonstrate the existence of two different scalings in the
log
10
ω
cyc
–
log
10
Ω
plane for an extended Mt. Wilson sample of 67 stars. Thanks to metallicity measurements obtained from both ESA Gaia and high-resolution spectroscopy, we argue that the origin of this dichotomy is likely related to the chemical composition: stars whose magnetic cycle frequency increases with rotation rate are less metallic than stars whose magnetic cycle frequency decreases with stellar rotation rates. On the contrary, no clear difference in chromospheric magnetic activity indicators characterizes the two branches.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/ac9c05</identifier><language>eng</language><publisher>Austin: The American Astronomical Society</publisher><subject>Algorithms ; Chemical composition ; Metallicity ; Regression analysis ; Scaling laws ; Spectroscopy ; Stars ; Stellar activity ; Stellar magnetic fields ; Stellar rotation</subject><ispartof>Astrophysical journal. Letters, 2022-11, Vol.939 (2), p.L26</ispartof><rights>2022. The Author(s). Published by the American Astronomical Society.</rights><rights>2022. The Author(s). Published by the American Astronomical Society. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c381t-b9fe82353c2372887d65a22b32d423ff2bc46ff74a2a05b1c1bf0b4086407e9e3</citedby><cites>FETCH-LOGICAL-c381t-b9fe82353c2372887d65a22b32d423ff2bc46ff74a2a05b1c1bf0b4086407e9e3</cites><orcidid>0000-0003-3175-9776 ; 0000-0001-8835-2075</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/2041-8213/ac9c05/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,780,784,864,27924,27925,38868,38890,53840,53867</link.rule.ids></links><search><creatorcontrib>Bonanno, Alfio</creatorcontrib><creatorcontrib>Corsaro, Enrico</creatorcontrib><title>On the Origin of the Dichotomy of Stellar Activity Cycles</title><title>Astrophysical journal. Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>The presence of possible correlations between stellar rotation rate Ω and the frequency of the activity cycle
ω
cyc
is still much debated. We implement a new Bayesian classification algorithm based on a simultaneous regression analysis of multiple scaling laws and we demonstrate the existence of two different scalings in the
log
10
ω
cyc
–
log
10
Ω
plane for an extended Mt. Wilson sample of 67 stars. Thanks to metallicity measurements obtained from both ESA Gaia and high-resolution spectroscopy, we argue that the origin of this dichotomy is likely related to the chemical composition: stars whose magnetic cycle frequency increases with rotation rate are less metallic than stars whose magnetic cycle frequency decreases with stellar rotation rates. On the contrary, no clear difference in chromospheric magnetic activity indicators characterizes the two branches.</description><subject>Algorithms</subject><subject>Chemical composition</subject><subject>Metallicity</subject><subject>Regression analysis</subject><subject>Scaling laws</subject><subject>Spectroscopy</subject><subject>Stars</subject><subject>Stellar activity</subject><subject>Stellar magnetic fields</subject><subject>Stellar rotation</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><recordid>eNp1kM9LwzAUx4MoOKd3jwXBk3XJS9omxzF_QmEH9RzSLHEZ3VqTTOh_b2tlXvT03vvy-X4ffBG6JPiWclbMADOSciB0prTQODtCk4N0fNhxdorOQthgDDgnfILEcpfEtUmW3r27XdLY7-vO6XUTm203CC_R1LXyyVxH9-lilyw6XZtwjk6sqoO5-JlT9PZw_7p4Ssvl4_NiXqaachLTSljDgWZUAy2A82KVZwqgorBiQK2FSrPc2oIpUDiriCaVxRXDPGe4MMLQKboac1vffOxNiHLT7P2ufymhoIxiIQTvKTxS2jcheGNl691W-U4SLIeC5NCAHNqQY0G95Xq0uKb9zVTtppaCCgmyhFy2K9uDN3-A_-Z-Ac_bcfI</recordid><startdate>20221101</startdate><enddate>20221101</enddate><creator>Bonanno, Alfio</creator><creator>Corsaro, Enrico</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-3175-9776</orcidid><orcidid>https://orcid.org/0000-0001-8835-2075</orcidid></search><sort><creationdate>20221101</creationdate><title>On the Origin of the Dichotomy of Stellar Activity Cycles</title><author>Bonanno, Alfio ; Corsaro, Enrico</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c381t-b9fe82353c2372887d65a22b32d423ff2bc46ff74a2a05b1c1bf0b4086407e9e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Algorithms</topic><topic>Chemical composition</topic><topic>Metallicity</topic><topic>Regression analysis</topic><topic>Scaling laws</topic><topic>Spectroscopy</topic><topic>Stars</topic><topic>Stellar activity</topic><topic>Stellar magnetic fields</topic><topic>Stellar rotation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bonanno, Alfio</creatorcontrib><creatorcontrib>Corsaro, Enrico</creatorcontrib><collection>Institute of Physics Open Access Journal Titles</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bonanno, Alfio</au><au>Corsaro, Enrico</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>On the Origin of the Dichotomy of Stellar Activity Cycles</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2022-11-01</date><risdate>2022</risdate><volume>939</volume><issue>2</issue><spage>L26</spage><pages>L26-</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>The presence of possible correlations between stellar rotation rate Ω and the frequency of the activity cycle
ω
cyc
is still much debated. We implement a new Bayesian classification algorithm based on a simultaneous regression analysis of multiple scaling laws and we demonstrate the existence of two different scalings in the
log
10
ω
cyc
–
log
10
Ω
plane for an extended Mt. Wilson sample of 67 stars. Thanks to metallicity measurements obtained from both ESA Gaia and high-resolution spectroscopy, we argue that the origin of this dichotomy is likely related to the chemical composition: stars whose magnetic cycle frequency increases with rotation rate are less metallic than stars whose magnetic cycle frequency decreases with stellar rotation rates. On the contrary, no clear difference in chromospheric magnetic activity indicators characterizes the two branches.</abstract><cop>Austin</cop><pub>The American Astronomical Society</pub><doi>10.3847/2041-8213/ac9c05</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-3175-9776</orcidid><orcidid>https://orcid.org/0000-0001-8835-2075</orcidid><oa>free_for_read</oa></addata></record> |
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| source | DOAJ Directory of Open Access Journals; Institute of Physics Open Access Journal Titles; Institute of Physics IOPscience extra; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Algorithms Chemical composition Metallicity Regression analysis Scaling laws Spectroscopy Stars Stellar activity Stellar magnetic fields Stellar rotation |
| title | On the Origin of the Dichotomy of Stellar Activity Cycles |
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