2012A&A...542A.124L


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.11CET23:22:21

2012A&A...542A.124L - Astronomy and Astrophysics, volume 542A, 124-124 (2012/6-1)

Period decrease in three SuperWASP eclipsing binary candidates near the short-period limit.

LOHR M.E., NORTON A.J., KOLB U.C., ANDERSON D.R., FAEDI F. and WEST R.G.

Abstract (from CDS):

SuperWASP light curves for 53 W UMa-type eclipsing binary (EB) candidates, identified in previous work as being close to the contact binary short-period limit, were studied for evidence of period change. The orbital periods of most of the stars were confirmed, and period decrease, significant at more than 5σ, was observed in three objects: 1SWASPJ174310.98+432709.6 (-0.055±0.003s/yr), 1SWASPJ133105.91+121538.0 (-0.075±0.013s/yr) and 1SWASPJ234401.81-212229.1 (-0.313±0.019s/yr). The magnitudes of the observed period changes cannot be explained by magnetic braking or gravitational radiation effects, and are most likely primarily due to unstable mass transfer from primary to secondary components, possibly accompanied by unstable mass and angular momentum loss from the systems. If these period decreases persist, the systems could merge on a relatively short timescale.

Abstract Copyright:

Journal keyword(s): stars: variables: general - binaries: eclipsing - stars: individual: V1067 Her - stars: individual: GSC 2314-0530 - binaries: close

Simbad objects: 55

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Number of rows : 55

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 KIC 60017810 EB? 00 04 37.8403447025 +03 33 01.141555537     14.53     ~ 4 0
2 1SWASP J003033.05+574347.6 EB? 00 30 33.1070096167 +57 43 47.294707379     14.89     ~ 3 0
3 EPIC 220522328 EB? 00 40 50.6734375765 +07 16 13.828537511 13.04 12.90 12.18 11.76 11.30 ~ 5 0
4 V* BX Tri WU* 02 20 50.850720 +33 20 47.55228   14.86 13.37 12.98 10.98 ~ 37 0
5 2MASS J02272703+1156415 WU* 02 27 27.0422678377 +11 56 41.616079840     14.95     ~ 6 1
6 1SWASP J030749.87-365201.7 EB? 03 07 49.918 -36 52 02.18     14.87     ~ 5 0
7 2MASS J03443996+0304254 WU* 03 44 39.9797865642 +03 04 25.416006007     13.79     ~ 5 0
8 1SWASP J040615.79-425002.3 EB? 04 06 15.8287902425 -42 50 02.335795684     14.14     ~ 4 0
9 2MASS J04112058-2302332 EB* 04 11 20.5976637417 -23 02 33.150111696     13.95     ~ 5 0
10 1SWASP J041655.13-492709.8 EB? 04 16 55.1558552040 -49 27 09.809317209     15.04     ~ 4 0
11 1SWASP J044132.96+440613.7 EB? 04 41 32.9565613739 +44 06 13.511362393     14.19     ~ 5 0
12 2MASS J05090445-0741442 EB? 05 09 04.458 -07 41 44.24     13.29     ~ 6 0
13 1SWASP J051501.18-021948.7 WU* 05 15 01.1165877805 -02 19 50.445761551     14.53     ~ 4 0
14 1SWASP J052036.84+030402.1 EB? 05 20 36.8480651338 +03 04 02.284431051     12.35     ~ 5 0
15 1SWASP J055418.43+442549.8 EB? 05 54 18.43 +44 25 49.8     12.73     ~ 3 0
16 UCAC4 622-035881 WU* 06 45 01.21 +34 21 54.9   15.298 14.11     K4-5 5 0
17 2MASS J07465863+2244481 WU* 07 46 58.6434169892 +22 44 48.245062224     14.13     ~ 13 0
18 2MASS J08015004+4714333 EB* 08 01 50.0296869233 +47 14 33.430288642     13.40     ~ 9 0
19 1SWASP J092328.76+435044.8 EB? 09 23 28.76 +43 50 44.8     13.03     ~ 2 0
20 1SWASP J092756.25-391119.2 EB? 09 27 56.25 -39 11 19.2     11.77     ~ 3 0
21 GSC 03807-00759 ** 09 30 10.770144 +53 38 59.63712   10.52 9.54 9.28   ~ 22 0
22 TYC 7730-94-1 EB* 11 19 31.4887587277 -39 50 48.376232939   11.51 11.02     G6V+G6V 5 0
23 V* SV Cen WU* 11 47 57.2195336815 -60 33 57.757259516 7.98 9.71 9.70 9.46 8.810 B1/3 132 0
24 1SWASP J114929.22-423049.0 EB? 11 49 29.1971719917 -42 30 48.921750297   15.56 14.33 13.48 12.67 ~ 4 0
25 1SWASP J115557.80+072010.8 EB* 11 55 57.8607715042 +07 20 11.165119689     15.18 15.41   ~ 5 0
26 TYC 5518-774-1 EB? 11 56 05.8866249399 -09 13 00.745657850   12.65 12.22     ~ 4 0
27 1SWASP J120110.98-220210.8 EB? 12 01 10.9711332204 -22 02 10.737971342   16.13 15.01 14.32 13.72 ~ 4 0
28 1SWASP J121906.35-240056.9 EB? 12 19 06.3291256208 -24 00 56.955683373     15.25     ~ 4 0
29 1SWASP J130920.49-340919.9 EB? 13 09 20.4735000000 -34 09 19.967962944     13.91     ~ 3 0
30 TYC 895-616-1 EB* 13 31 05.8411799739 +12 15 38.395833341   11.74 10.667 10.56   ~ 12 0
31 1SWASP J142312.63-222425.1 EB? 14 23 12.6216179806 -22 24 25.258350090     13.19     ~ 4 0
32 UCAC4 422-060886 WU* 15 08 22.7872307298 -05 42 36.897036423     12.45 12.306   ~ 9 0
33 1SWASP J151652.90+004835.8 EB? 15 16 52.8659988686 +00 48 35.557266974     13.97     ~ 4 0
34 1SWASP J155822.10-025604.8 WU* 15 58 22.0971243623 -02 56 04.861954565   14.870 13.87     ~ 7 0
35 GSC 01511-00479 WU* 16 01 56.0393215017 +20 28 21.535317171     13.81     ~ 13 0
36 EPIC 202674486 EB? 16 13 34.2874413131 -28 47 06.726501703     12.43     ~ 4 0
37 2MASS J17024006+1511236 WU* 17 02 40.0587870962 +15 11 23.452887776     13.56     ~ 5 0
38 V* V1498 Her WU* 17 30 03.2224168432 +34 45 09.373936762     13.78     ~ 5 0
39 1SWASP J173828.46+111150.2 EB? 17 38 28.46 +11 11 50.2     13.80     ~ 4 0
40 V* V1067 Her WU* 17 43 10.9791308682 +43 27 09.456631386     13.513 12.889   ~ 29 0
41 V* V1309 Sco CV* 17 57 32.9383021931 -30 43 09.967391199   16.9   14.8   ~ 166 0
42 V* V1104 Her WU* 18 09 47.6416547053 +49 02 54.992095216   14.0 13.51 13.560   ~ 28 0
43 1SWASP J183738.17+402427.2 EB? 18 37 38.1839884076 +40 24 27.091181765     14.45     ~ 3 0
44 1SWASP J195900.31-252723.1 EB? 19 59 00.31 -25 27 23.1     14.64     ~ 3 0
45 1SWASP J210318.76+021002.2 EB? 21 03 18.7656119146 +02 10 02.320516594     13.00     ~ 6 0
46 1SWASP J210423.76+073140.4 dS* 21 04 23.76 +07 31 40.4     13.40     ~ 5 0
47 1SWASP J212454.61+203030.8 EB? 21 24 54.61 +20 30 30.8     14.35     ~ 4 0
48 UCAC4 527-142875 WU* 21 28 08.8583492723 +15 16 21.935350805   16.108 14.49     ~ 8 0
49 1SWASP J214510.25-494401.1 EB? 21 45 10.250 -49 44 01.64     14.55     ~ 3 0
50 1SWASP J220734.47+265528.6 EB? 22 07 34.4722504078 +26 55 28.460999230     14.25     ~ 3 0
51 1SWASP J221058.82+251123.4 EB? 22 10 58.82 +25 11 23.4     15.13     ~ 3 0
52 1SWASP J224747.20-351849.3 EB? 22 47 47.2052573327 -35 18 49.731668013     13.89     ~ 4 0
53 1SWASP J232607.07-294130.7 EB? 23 26 07.07 -29 41 30.7     13.71     ~ 3 0
54 StKM 1-2148 EB* 23 44 01.8128649515 -21 22 29.080880031   12.84 11.70 11.50   K4 13 0
55 1SWASP J235333.60+455245.8 EB? 23 53 33.5999221260 +45 52 45.888082898     14.75     ~ 3 0

    Equat.    Gal    SGal    Ecl

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2019.12.11-23:22:21

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