2015ApJ...798...92W

Query : 2015ApJ...798...92W

2015ApJ...798...92W - Astrophys. J., 798, 92 (2015/January-2)

A study of variability in the frequency distributions of the superflares of G-type stars observed by the Kepler mission.

WU C.-J., IP W.-H. and HUANG L.-C.

Abstract (from CDS):

The energy and time profiles of 4944 superflares from 77 G-type stars with well-defined light curve periodicities from the Kepler measurements have been analyzed in detail. The total value of the power-law index of the flare frequency distribution as a function of energy (dN/dE ∝ E –γ) between 5x1034 and 1036 erg is on average γ = 2.04±0.17, which is in agreement with previous results. The γ values of eight stars with frequent flaring activity vary between 1.59±0.06 and 2.11±0.19, suggesting a possible diversity of energy release effects. In general, stars with shorter rotation periods tend to have larger γ values. There is an indication that the flare energy is saturated at about 2x1037 erg. For a few large superflares of this energy range, it is found that their temporal behaviors could be characterized by a transition from single impulsive flares to long-duration flares composed of several flares.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - stars: flare - stars: rotation - stars: solar-type - stars: statistics

Simbad objects: 78

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Number of rows : 78
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
2 2MASS J18423992+4356353 * 18 42 39.9208552608 +43 56 35.473328124           ~ 17 0
3 2MASS J18455947+4403253 * 18 45 59.4736617672 +44 03 25.334325288           ~ 10 0
4 2MASS J18460554+4244143 * 18 46 05.5472787408 +42 44 14.304835104           ~ 14 0
5 2MASS J18463426+4248017 * 18 46 34.2631687584 +42 48 01.733639940           ~ 13 0
6 2MASS J18483078+4442071 * 18 48 30.7826776128 +44 42 07.089924240           ~ 14 0
7 2MASS J18485221+4357010 * 18 48 52.2117408672 +43 57 01.010285424           ~ 15 0
8 2MASS J18501749+4754152 * 18 50 17.5005288048 +47 54 15.146975448           G5 21 0
9 2MASS J18524470+4351016 * 18 52 44.7082977048 +43 51 01.621356012           ~ 14 0
10 ZTF J185516.63+473732.9 RS* 18 55 16.6337894088 +47 37 32.960077500           ~ 20 0
11 2MASS J18553730+4037592 * 18 55 37.3009985520 +40 37 59.234501784           ~ 16 0
12 2MASS J18574324+4435558 * 18 57 43.2439789824 +44 35 55.770696996           G2V 32 0
13 V* V746 Lyr BY* 19 01 23.1095938704 +39 39 55.002290256   11.98 11.19     ~ 29 0
14 TYC 3128-361-1 * 19 02 36.1224324624 +42 48 31.723434252   12.62 11.89     ~ 28 0
15 2MASS J19024620+3832385 * 19 02 46.2047902032 +38 32 38.599310652           ~ 8 0
16 2MASS J19031922+5028589 * 19 03 19.2406598472 +50 28 58.764338904           ~ 16 0
17 2MASS J19042327+3727180 * 19 04 23.2646638224 +37 27 18.037830420           ~ 14 0
18 2MASS J19042373+4430098 * 19 04 23.7388555896 +44 30 09.852943860           ~ 16 0
19 2MASS J19061247+3905445 * 19 06 12.4629966552 +39 05 44.462268132           ~ 16 0
20 2MASS J19072525+3932068 * 19 07 25.2479627376 +39 32 06.903038904           ~ 15 0
21 ZTF J190743.14+444324.1 RS* 19 07 43.1367205944 +44 43 24.193298532           ~ 15 0
22 2MASS J19081617+3759120 * 19 08 16.1659565568 +37 59 12.095979468           ~ 10 0
23 ZTF J190914.99+485636.3 BY* 19 09 14.9989727904 +48 56 36.008643480           ~ 15 0
24 TYC 3550-936-1 Er* 19 09 40.4398554336 +49 30 05.160015900   11.75 11.08 10.698   G5IV 35 0
25 2MASS J19095607+4856538 * 19 09 56.0865693048 +48 56 53.781804564           ~ 13 0
26 2MASS J19111103+5114317 gD* 19 11 11.0398583472 +51 14 31.701791148           ~ 13 0
27 KOI-7757 * 19 14 37.6697849664 +41 23 58.421007024       13.521   ~ 15 0
28 2MASS J19145455+4826418 * 19 14 54.5586879960 +48 26 41.890331004           ~ 14 0
29 2MASS J19153224+4745341 * 19 15 32.2415956296 +47 45 34.139329884           G4V 39 0
30 2MASS J19153862+4630525 * 19 15 38.6303429592 +46 30 52.622169876           G2V 16 0
31 2MASS J19162046+4635355 * 19 16 20.4658525368 +46 35 35.578006728           ~ 17 0
32 2MASS J19162158+4120004 * 19 16 21.5844966048 +41 20 00.467930040           ~ 19 0
33 2MASS J19174648+4602131 * 19 17 46.4848136832 +46 02 13.227401256           ~ 21 0
34 2MASS J19181575+4422351 * 19 18 15.7606922520 +44 22 35.066589996           G5V 20 0
35 2MASS J19184216+4022236 * 19 18 42.1689036312 +40 22 23.680008408           ~ 14 0
36 2MASS J19194514+4532558 * 19 19 45.1408731096 +45 32 55.815320148           ~ 13 0
37 2MASS J19194792+4613382 * 19 19 47.9335043664 +46 13 38.247790188           ~ 23 0
38 2MASS J19201758+4043553 ** 19 20 17.583 +40 43 55.36           ~ 15 0
39 ZTF J192042.49+453005.1 BY* 19 20 42.5005192056 +45 30 05.170615200           ~ 16 0
40 2MASS J19212494+4043394 * 19 21 24.9431527008 +40 43 39.397687788           ~ 16 0
41 2MASS J19214194+4435477 * 19 21 41.9516220240 +44 35 47.687793972           ~ 12 0
42 2MASS J19214851+3743302 * 19 21 48.5071578312 +37 43 30.183492720           G5V 15 0
43 TYC 3138-950-1 * 19 21 49.5315056760 +39 50 07.411275132   11.35 10.71     ~ 28 0
44 TYC 3138-1050-1 SB* 19 21 58.0619883120 +39 59 54.426173460   11.47 10.73     G8 27 0
45 2MASS J19225107+4050442 * 19 22 51.0842309832 +40 50 44.323671660           G1III 14 0
46 2MASS J19231859+4036240 ** 19 23 18.595 +40 36 24.03           G5 22 0
47 2MASS J19232760+3803070 * 19 23 27.6059451312 +38 03 07.006898628           ~ 11 0
48 2MASS J19232883+3806432 * 19 23 28.8336786720 +38 06 43.321044096           ~ 14 0
49 2MASS J19235011+3734422 * 19 23 50.1106590024 +37 34 42.124270548           ~ 15 0
50 2MASS J19251501+3637596 * 19 25 15.0057478008 +36 37 59.590660260           ~ 10 0
51 2MASS J19252015+3757080 * 19 25 20.1568678728 +37 57 08.042592564           ~ 9 0
52 2MASS J19255457+3737427 * 19 25 54.5719361592 +37 37 42.767895108           ~ 10 0
53 2MASS J19262436+4806163 * 19 26 24.3731267784 +48 06 16.355808000           G5V 15 0
54 2MASS J19271411+3738232 * 19 27 14.1150798672 +37 38 23.148319416           G0 13 0
55 2MASS J19275054+4210183 * 19 27 50.5478457240 +42 10 18.341499360           ~ 14 0
56 ATO J291.9695+38.2798 * 19 27 52.7001081840 +38 16 47.443025208           ~ 17 0
57 2MASS J19300381+4219595 * 19 30 03.8210406600 +42 19 59.483713188           ~ 21 0
58 2MASS J19303363+4956047 * 19 30 33.6316891488 +49 56 04.731130140           ~ 23 0
59 2MASS J19310005+3949561 * 19 31 00.0514098144 +39 49 56.126381160           ~ 14 0
60 2MASS J19310605+4412425 * 19 31 06.0562906776 +44 12 42.477596784           ~ 15 0
61 2MASS J19323878+3802131 * 19 32 38.7850682256 +38 02 13.134969060           G8IV-V 17 0
62 TYC 3556-1462-1 * 19 33 05.5731796560 +46 19 08.474225952   11.80 11.45     G0Vs 36 0
63 2MASS J19331778+4306178 * 19 33 17.7823884480 +43 06 17.923891104           ~ 22 0
64 ZTF J193339.50+421129.9 RS* 19 33 39.5079532080 +42 11 29.721833988           ~ 19 0
65 2MASS J19334832+4621539 * 19 33 48.3237823392 +46 21 53.944662420           G0.5Va 25 0
66 2MASS J19335384+3800527 * 19 33 53.8469755104 +38 00 52.840119672           K0IV-V 11 0
67 2MASS J19340502+4249211 * 19 34 05.0137592880 +42 49 21.216915084           ~ 14 0
68 2MASS J19375768+4647192 Pu* 19 37 57.6963527880 +46 47 19.127921388           ~ 15 0
69 2MASS J19383911+3837589 * 19 38 39.1237673544 +38 37 58.887862176           ~ 18 0
70 TYC 3148-804-1 SB* 19 41 51.6365682576 +43 39 55.159533216   13.00 12.19     ~ 21 0
71 2MASS J19430709+5059073 * 19 43 07.0909992240 +50 59 07.228351176           ~ 20 0
72 2MASS J19442269+3856440 * 19 44 22.6933611552 +38 56 44.007670068           ~ 11 0
73 ATO J296.8992+47.3797 BY* 19 47 35.8188243984 +47 22 47.093557800           ~ 13 0
74 2MASS J19475370+4804106 * 19 47 53.6983162008 +48 04 10.710547500           ~ 13 0
75 2MASS J19484026+4111537 * 19 48 40.2760257480 +41 11 53.449543608           G2V 20 0
76 2MASS J19513906+4733497 * 19 51 39.0632457912 +47 33 49.683456468           ~ 18 0
77 2MASS J19534575+4741596 * 19 53 45.7533832080 +47 41 59.668832688           ~ 14 0
78 2MASS J19551210+4825473 * 19 55 12.1127305464 +48 25 47.246356524           ~ 11 0

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