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Sethi, Ritika; Martin, David V
Monthly notices of the Royal Astronomical Society, 03/2024, Letnik: 529, Številka: 4Journal Article
ABSTRACT Stellar binaries are ubiquitous in the galaxy and a laboratory for astrophysical effects. We use TESS to study photometric modulations in the light curves of 162 unequal mass eclipsing binaries from the EBLM (Eclipsing Binary Low Mass) survey, comprising F/G/K primaries and M-dwarf secondaries. We detect modulations on 81 eclipsing binaries. We catalogue the rotation rates of the primary star in 69 binaries and discover 17 ellipsoidal variables. In a large portion (at least $\sim 51~{{\ \rm per\ cent}}$) of our sample, we detect photometric modulations consistent with two overdensities of spots on the primary star that are roughly 180° apart. We show that these so-called active longitudes are preferentially at the sub- and antistellar points on the primary star. Physically, this means that the spots on the primary star preferentially face directly towards and away from the secondary star.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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