SIMBAD references

2015MNRAS.448.2890D - Mon. Not. R. Astron. Soc., 448, 2890-2899 (2015/April-2)

Ultrashort-period main-sequence eclipsing systems: new observations and light-curve solutions of six NSVS binaries.

DIMITROV D.P. and KJURKCHIEVA D.P.

Abstract (from CDS):

We carried out photometric and low-resolution spectral observations of six eclipsing ultrashort-period binaries with main-sequence (MS)components. The light-curve solutions of the Rozhen observations show that all targets are overcontact systems. We found a well-defined empirical relation between period and semi-major axis for the short-period binaries and used it for estimation of the global parameters of the targets. Our results revealed that NSVS 925605 is quite an interesting target: (i) it is one of a few contact binaries with M components; (ii) it exhibits high activity (emission in the Hα line, X-ray emission, large cool spots, non-Planck energy distribution); (iii) its components differ in temperature by 700 K. All the appearances of high magnetic activity and the huge fill-out factor (0.7) of NSVS 925605 may be a precursor of the predicted merging of close magnetic binaries. Another unusual binary is NSVS 2700153, which reveals considerable long-term variability.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): binaries: eclipsing - stars: fundamental parameters - stars: individual: NSVS 925605 - stars: late-type

VizieR on-line data: <Available at CDS (J/MNRAS/448/2890): table1.dat tablea1.dat tablea2.dat tablea3.dat>

Simbad objects: 25

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2020.01.27-14:01:25

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