TIC 168789840 - die unglaublichen Sechslinge | Astronomie.de - Der Treffpunkt für Astronomie

TIC 168789840 - die unglaublichen Sechslinge

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Drei Doppelsternpaare in einem System, und allesamt bedeckungsveränderlich, also wie Algol mit ihrer Bahnebene in unserer Blickrichtung, das hat es bislang noch nicht gegeben:

TIC 168789840: A Sextuply-Eclipsing Sextuple Star System

We report the discovery of a sextuply-eclipsing sextuple star system from TESS data, TIC 168789840, also known as TYC 7037-89-1, the first known sextuple system consisting of three eclipsing binaries. The system consists of three gravitationally-bound eclipsing binaries in a hierarchical structure of an inner quadruple system with an outer binary subsystem. The system was resolved by speckle interferometry with a 0. 0042 separation between the inner quadruple and outer binary, inferring an estimated outer period of ∼2 kyr. It was determined that the fainter of the two resolved components is an 8.217 day eclipsing binary, which orbits the inner quadruple that contains two eclipsing binaries with periods of 1.570 days and 1.306 days.

TIC 168789840.jpg

Credit: B.P. Powell et al.

The New York Times: Six Stars, Six Eclipses: ‘The Fact That It Exists Blows My Mind’

The source, named TIC 168789840, is a system of six stars. Although a handful of other six-star systems have been discovered, this one is unique: It is the first in which the stars within each of those three pairings pass in front of and behind each other, eclipsing the other member of its stellar dance troupe, at least from our space telescope’s line of sight. In other words, scientists have found a sextuply eclipsing sextuple star system.
 
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