| dbo:abstract |
SW Lyncis is a binary or possibly a multiple-star system in the northern constellation of Lynx, abbreviated SW Lyn. With a combined apparent visual magnitude of 9.58, it is too faint to be visible to the naked eye. The system is located at a distance of approximately 970 light years based on parallax measurements, and is drifting further away with a net radial velocity of about +32 km/s. The variable luminosity of this system was reported by R. Kippenhahn in 1955. Huth in 1958 classified it as a β Lyr-type variable. found a short period of 15.46 hours in 1959, although there was no minimum detected from a secondary eclipse. classified this as an eclipsing binary of the Algol type based on a light curve assembled in 1960. in 1967 noted that the period of the system had changed, suggesting that there may be a third body in the system. He considered it to be a member of the β Lyr class, although it is more closely related to the Algol type than W Ursae Majoris variables. noted in 1968 that the light curve for the system appeared noticeably asymmetric. He published orbital elements for this system in 1977 and found a stellar classification of F2V for the primary component. A low mass ratio suggested the secondary is much smaller and less luminous than the primary. and associates in 1991 concluded that this is a semi-detached system with one of the components filling its Roche lobe, and thought the secondary to be over-sized and over-luminous for its mass. and associates in 1998 supported the idea of a semi-detached system, and found that the light curve suggested the presence of a third component in the system with an orbital period of 5.83 years. The third component is thought to contribute less than 1.5% of the light output of the system. In 2010, C.-H. Kim and associates performed modelling of the 34-year cycle variations of the system and conjectured that two additional circumbinary companions are creating this effect. However, subsequent studies suggest that such a configuration would be too unstable. The system behavior remains unexplained. SW Lyn is presently classified as a near contact binary that decreases in brightness to magnitude 10.20 during the primary eclipse and to magnitude 9.65 with the secondary eclipse. (en) |
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wiki-commons:Special:FilePath/SWLynLightCurve.png?width=300 |
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| dbp:appmagV |
9.580000 (xsd:double) primary eclipse: 10.20 (en) secondary eclipse: 9.65 (en) |
| dbp:bV |
0.255000 (xsd:double) |
| dbp:class |
F2 V (en) |
| dbp:component |
Primary (en) Secondary (en) |
| dbp:constell |
dbr:Lynx_(constellation) |
| dbp:eccentricity |
0 (xsd:integer) |
| dbp:epoch |
J2000 (en) |
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116.730000 (xsd:double) 222.750000 (xsd:double) |
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0.057100 (xsd:double) |
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3.365500 (xsd:double) |
| dbp:periodUnitless |
55647.3024 (dbd:second) |
| dbp:propMoDec |
−36.795 (en) |
| dbp:propMoRa |
−16.887 (en) |
| dbp:radialV |
+32.39 (en) |
| dbp:temperature |
4588 (xsd:integer) 7800 (xsd:integer) |
| dbp:variable |
dbr:Algol_variable dbr:Detached_binary |
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| rdfs:comment |
SW Lyncis is a binary or possibly a multiple-star system in the northern constellation of Lynx, abbreviated SW Lyn. With a combined apparent visual magnitude of 9.58, it is too faint to be visible to the naked eye. The system is located at a distance of approximately 970 light years based on parallax measurements, and is drifting further away with a net radial velocity of about +32 km/s. (en) |
| rdfs:label |
SW Lyncis (en) |
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wikidata:SW Lyncis https://global.dbpedia.org/id/GTwSs |
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wikipedia-en:SW_Lyncis?oldid=1102783875&ns=0 |
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wiki-commons:Special:FilePath/SWLynLightCurve.png |
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wikipedia-en:SW_Lyncis |
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dbr:List_of_stars_in_Lynx |
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wikipedia-en:SW_Lyncis |
