Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100385557> ?p ?o ?g. }
- W3100385557 endingPage "203" @default.
- W3100385557 startingPage "203" @default.
- W3100385557 abstract "We explore the connection between starspots and plages of three main-sequence stars by studying the chromospheric and photospheric activity over several rotation periods. We present simultaneous photometry and high-resolution (R ∼ 31500) spectroscopy of KIC 9652680, a young, super-flare-producing G1 star with a rotation period of 1.4 days. Its Kepler light curve shows rotational modulation consistent with a bright hemisphere followed by a relatively dark hemisphere, generating photometric variability with a semi-amplitude of 4%. We find that KIC 9652680 is darkest when its S-index of Ca ii H & K emission is at its maximum. We interpret this anti-correlation between flux and S to indicate that dark starspots in the photosphere are co-located with the bright plages in the chromosphere, as they are on the Sun. Moving to lower masses and slower rotators, we present K2 observations with simultaneous spectroscopy of EPIC 211928486 (K5V) and EPIC 211966629 (K4V), two active stars in the 650 Myr old open cluster Praesepe. The K2 photometry reveals that both stars have rotation periods of 11.7 days; while their flux varies by 1 and 2% respectively, their Ca ii H & K S-indices seem to hold relatively constant as a function of rotational phase. This suggests that extended chromospheric networks of plages are not concentrated into regions of emission centered on the starspots that drive rotational modulation, unlike KIC 9652680. We also note that the Ca ii emission of EPIC 211928486 dipped and recovered suddenly over the duration of one rotation, suggesting that the evolution timescale of plages may be of order the rotation period." @default.
- W3100385557 created "2020-11-23" @default.
- W3100385557 creator A5015839768 @default.
- W3100385557 creator A5016442681 @default.
- W3100385557 creator A5022671363 @default.
- W3100385557 creator A5063470369 @default.
- W3100385557 creator A5067643722 @default.
- W3100385557 creator A5069865464 @default.
- W3100385557 creator A5083799931 @default.
- W3100385557 date "2018-10-17" @default.
- W3100385557 modified "2023-10-16" @default.
- W3100385557 title "Are Starspots and Plages Co-located on Active G and K Stars?" @default.
- W3100385557 cites W1481260196 @default.
- W3100385557 cites W1832879484 @default.
- W3100385557 cites W1886785440 @default.
- W3100385557 cites W1966668197 @default.
- W3100385557 cites W1970579629 @default.
- W3100385557 cites W1979745831 @default.
- W3100385557 cites W1980624379 @default.
- W3100385557 cites W1980931609 @default.
- W3100385557 cites W2011301426 @default.
- W3100385557 cites W2015367915 @default.
- W3100385557 cites W2020182256 @default.
- W3100385557 cites W2024456552 @default.
- W3100385557 cites W2024677840 @default.
- W3100385557 cites W2025453514 @default.
- W3100385557 cites W2028763537 @default.
- W3100385557 cites W2031043816 @default.
- W3100385557 cites W2046706635 @default.
- W3100385557 cites W2051873756 @default.
- W3100385557 cites W2060147469 @default.
- W3100385557 cites W2061939373 @default.
- W3100385557 cites W2074559645 @default.
- W3100385557 cites W2076877985 @default.
- W3100385557 cites W2078282619 @default.
- W3100385557 cites W2084937470 @default.
- W3100385557 cites W2113074944 @default.
- W3100385557 cites W2117673689 @default.
- W3100385557 cites W2117914263 @default.
- W3100385557 cites W2132632814 @default.
- W3100385557 cites W2133670009 @default.
- W3100385557 cites W2142350809 @default.
- W3100385557 cites W2147930796 @default.
- W3100385557 cites W2157805129 @default.
- W3100385557 cites W2287293594 @default.
- W3100385557 cites W2344233738 @default.
- W3100385557 cites W2474034009 @default.
- W3100385557 cites W2589285540 @default.
- W3100385557 cites W2597993038 @default.
- W3100385557 cites W2605510428 @default.
- W3100385557 cites W2743578016 @default.
- W3100385557 cites W2755835083 @default.
- W3100385557 cites W2794147627 @default.
- W3100385557 cites W2886436365 @default.
- W3100385557 cites W2963722972 @default.
- W3100385557 cites W3098366316 @default.
- W3100385557 cites W3098471461 @default.
- W3100385557 cites W3098866402 @default.
- W3100385557 cites W3099497108 @default.
- W3100385557 cites W3101192061 @default.
- W3100385557 cites W3101679973 @default.
- W3100385557 cites W3101787414 @default.
- W3100385557 cites W3102014803 @default.
- W3100385557 cites W3102677776 @default.
- W3100385557 cites W3102828317 @default.
- W3100385557 cites W3103167797 @default.
- W3100385557 cites W3105312535 @default.
- W3100385557 cites W3105621264 @default.
- W3100385557 cites W3106234471 @default.
- W3100385557 cites W3106298536 @default.
- W3100385557 cites W3122508402 @default.
- W3100385557 doi "https://doi.org/10.3847/1538-3881/aae1ab" @default.
- W3100385557 hasPublicationYear "2018" @default.
- W3100385557 type Work @default.
- W3100385557 sameAs 3100385557 @default.
- W3100385557 citedByCount "16" @default.
- W3100385557 countsByYear W31003855572019 @default.
- W3100385557 countsByYear W31003855572020 @default.
- W3100385557 countsByYear W31003855572021 @default.
- W3100385557 countsByYear W31003855572022 @default.
- W3100385557 countsByYear W31003855572023 @default.
- W3100385557 crossrefType "journal-article" @default.
- W3100385557 hasAuthorship W3100385557A5015839768 @default.
- W3100385557 hasAuthorship W3100385557A5016442681 @default.
- W3100385557 hasAuthorship W3100385557A5022671363 @default.
- W3100385557 hasAuthorship W3100385557A5063470369 @default.
- W3100385557 hasAuthorship W3100385557A5067643722 @default.
- W3100385557 hasAuthorship W3100385557A5069865464 @default.
- W3100385557 hasAuthorship W3100385557A5083799931 @default.
- W3100385557 hasBestOaLocation W31003855571 @default.
- W3100385557 hasConcept C108884401 @default.
- W3100385557 hasConcept C121332964 @default.
- W3100385557 hasConcept C1276947 @default.
- W3100385557 hasConcept C130726490 @default.
- W3100385557 hasConcept C150846664 @default.
- W3100385557 hasConcept C155008239 @default.
- W3100385557 hasConcept C164546044 @default.
- W3100385557 hasConcept C178075534 @default.