2018AJ....156...88L

Query : 2018AJ....156...88L

2018AJ....156...88L - Astron. J., 156, 88-88 (2018/September-0)

Magnetic activity and period variation studies of the short-period eclipsing binaries. III. V1175 Her, NSVS 2669503, and 1SWASP J133417.80+394314.4.

LU H.-P., MICHEL R., ZHANG L.-Y. and CASTRO A.

Abstract (from CDS):

New multi-band CCD light curves of three binaries W UMa-type V1175 Her, NSVS 2669503, and 1SWASP J133417.80+394314.4 are presented. Spectroscopic data for V1175 Her and NSVS 2669503 show that their spectral types are G7V and K4V, respectively. Photometric solutions of these three objects were obtained with the help of the Wilson-Devinney program. We find that V1175 Her is a semi-detached binary star with a hot spot located on the secondary component, while NSVS 2669503 and 1SWASP J133417.80+394314.4 are contact eclipsing binaries with contact factors of f = 1.070 ± 0.002% and f = 21.250 ± 0.005%, respectively. Moreover, we found that the orbital period of V1175 Her is increasing at a rate of (+3.1 ± 0.1) x 10–7 days yr–1. This increase may be attributed to a dM1/dt=-0.93×10–7M☉yr–1 mass-transfer rate from the primary to the secondary component. Finally, we discuss the evolutionary stage of the component stars of these three systems.

Abstract Copyright: © 2018. The American Astronomical Society.

Journal keyword(s): binaries: eclipsing - stars: activity

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* DV Psc EB* 00 13 09.2040936096 +05 35 43.006765344   11.61 10.61 10.312 9.131 K5Ve 68 0
2 V* EP And EB* 01 42 29.3387367144 +44 45 42.452248608   11.81 11.40 11.562 11.223 F8V 63 0
3 V* V1128 Tau EB* 03 49 27.7666168464 +12 54 43.844508468   10.30 9.64     F8V 71 0
4 HD 34179 * 05 15 21.6976272336 +00 03 37.186750512   7.98 8.02     B8Ib/II 37 0
5 V* FZ Ori EB* 05 41 21.0050113464 +02 36 22.921746264   11.18 10.53 10.39 10.077 G0 59 0
6 V* V532 Mon EB* 07 04 30.6454459608 -00 21 05.470448472   12.67 12.20 11.914 11.615 ~ 32 0
7 V* XY UMa RS* 09 09 55.9354759992 +54 29 17.724193872       9.620   G5 253 0
8 V* V409 Hya EB* 09 10 09.5728648560 +03 44 34.457352648   12.01 11.44 10.946 10.676 ~ 19 0
9 V* LP UMa EB* 10 33 57.7932246384 +58 52 15.550735800           ~ 39 1
10 V* HH UMa dS* 11 04 48.1519686576 +35 36 26.616520008   10.92 10.39 10.283 10.006 F8 49 0
11 V* LO Com EB* 12 32 04.9081023864 +26 22 47.825242428   12.951 13.29 12.031 11.594 ~ 44 0
12 2MASS J12500559+5231242 PM* 12 50 05.6099659440 +52 31 24.227106528           ~ 1 0
13 NSVS 2669503 EB* 12 50 17.4062351904 +52 31 35.026614012     13.37     K4V 5 0
14 2MASS J12502674+5233221 * 12 50 26.7478584792 +52 33 22.089987036           ~ 1 0
15 2MASS J13341518+3940592 * 13 34 15.1725073416 +39 40 59.265745860           ~ 1 0
16 1SWASP J133417.80+394314.4 EB* 13 34 17.7929911512 +39 43 14.248689888     14.86     K2V 7 0
17 2MASS J13342182+3940205 * 13 34 21.8193569040 +39 40 20.656325892           ~ 1 0
18 TYC 1518-849-1 * 16 24 45.5014100904 +21 35 52.795275468   12.05 11.40     ~ 1 0
19 V* V1175 Her EB* 16 24 46.2190948968 +21 39 03.319157628   11.90 11.26     G7V 8 0
20 TYC 1518-763-1 * 16 24 56.1883994688 +21 36 05.402620116   13.47 12.76     ~ 1 0
21 Cl* NGC 6397 SAW V8 EB* 17 40 39.2669740848 -53 38 46.931702352   16.72 16.28   15.76 ~ 10 1
22 Cl* NGC 6397 SAW V7 EB* 17 40 43.9199366001 -53 40 35.292617809   17.74 17.09 16.72   ~ 15 0
23 V* V441 Lac EB* 22 09 37.4533542888 +52 34 14.798464824   13.81 12.93 12.69   ~ 19 0
24 NGC 7789 OpC 23 57 20.2 +56 43 34   7.68 6.7     ~ 528 0

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