Observations and light curve solutions of four ultrashort-period binaries

Observations and light curve solutions of four ultrashort-period binaries

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The paper presents light curve solutions of our observations of four new ultrashort-period eclipsing binaries with MS components.Two of them have periods almost at the upper limit (0.22 days) of the ultrashort-period binaries, sara stedy price while the periods of around 0.

18 days of CSS J171508.5+350658 and CSS J214633.8+120016 are amongst the shortest known orbital periods.

CSS J171410.0+ verragio paradiso 445850, CSS J214633.8+120016 and CSS J224326.

0+154532 are over contact binaries with fill out factors around 0.25 while CSS J171508.5+350658 is a semidetached system.

The two targets with shortest periods consist of M dwarfs.