2015MNRAS.448.2890D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:17:32

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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Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* BI Psc Er* 00 12 42.3731734272 +13 08 09.905674289           ~ 10 1
2 2MASS J00164102-0009251 WU* 00 16 41.0250279708 -00 09 25.255256101           M0V 28 0
3 V* V523 Cas EB* 00 40 06.2678868929 +50 14 15.516158313       10.405   K4V 154 0
4 V* BX Tri WU* 02 20 50.850720 +33 20 47.55228   14.86 13.37 12.98 10.98 ~ 39 0
5 1SWASP J055416.98+442534.0 EB* 05 54 17.0160229635 +44 25 34.076798059       12.50   ~ 13 0
6 NSVS 7179685 EB* 06 46 06.4706839714 +36 20 21.099976035       15.64   ~ 3 0
7 1SWASP J080150.03+471433.8 EB* 08 01 50.0296869233 +47 14 33.430288642     13.40     ~ 10 0
8 CRTS J081158.6+311959 EB* 08 11 58.5896310881 +31 19 59.581258130     16.15     ~ 3 0
9 StKM 1-704 EB* 08 31 27.877776 +19 53 03.50628   11.52 10.38 10.04 9.125 K4 38 0
10 2MASS J09011925+1142551 EB* 09 01 19.2500649903 +11 42 55.146213473     16.37     ~ 5 0
11 LP 486-53 EB* 09 08 26.2338622176 +12 36 49.894945197   17.1   16.0   ~ 10 0
12 2MASS J11164780+2946028 EB* 11 16 47.8005502379 +29 46 02.783464088     17.07     M4V 5 0
13 V* CC Com EB* 12 12 06.0377635998 +22 31 58.684494436   13.09 11.42   10.085 K4/5V 197 0
14 V* RW Com EB* 12 33 00.2841958714 +26 42 58.362399221   12.33 11.682 10.929   G8e 146 0
15 NSVS 2700153 EB* 13 43 51.4844555203 +63 04 22.895516757   14.39 13.27 13.19   ~ 3 0
16 NSVS 925605 EB* 14 01 46.3804741709 +77 16 38.462052882   15.90 14.24 13.89   ~ 5 0
17 * i Boo EB* 15 03 47.29565 +47 39 14.6228           G0Vn 525 0
18 1SWASP J150822.80-054236.9 EB* 15 08 22.7872307298 -05 42 36.897036423     12.45 12.306   ~ 9 0
19 1SWASP J160156.04+202821.6 EB* 16 01 56.0393215017 +20 28 21.535317171     13.81     ~ 16 0
20 OGLE BW3 V38 EB* 18 04 44.2034110073 -30 09 05.505472642     18.300   16.3335 ~ 39 0
21 V* FS CrA WU* 18 06 12.1976739073 -37 31 29.638446615           ~ 16 0
22 V* V803 Aql EB* 19 00 44.1854268626 -07 28 53.972949617           ~ 33 0
23 NSVS 8626028 EB* 21 16 26.8064929881 +25 17 36.179949712   15.56 14.36 14.03   ~ 3 0
24 V* BI Vul WU* 21 22 48.0350460134 +27 01 39.845571725           ~ 46 0
25 V* VZ Psc EB* 23 27 48.3882787476 +04 51 23.935673863   11.39 10.274 10.090 8.926 K4/5V 102 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-18:17:32

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