2020MNRAS.491.4345R

Query : 2020MNRAS.491.4345R

2020MNRAS.491.4345R - Mon. Not. R. Astron. Soc., 491, 4345-4364 (2020/January-3)

Pulsation and rotation in NGC 6811: the Kepler short-cadence stars.

RODRIGUEZ E., BALONA L.A., LOPEZ-GONZALEZ M.J., OCANDO S., MARTIN-RUIZ S. and RODRIGUEZ-LOPEZ C.

Abstract (from CDS):

We have analysed a selected sample of 36 Kepler short-cadence stars in the field of NGC 6811. The results reveal that all the targets are variable: two red giant stars with solar-like oscillations, 21 main-sequence pulsators (16 δ Scuti and five γ Doradus stars), and 13 rotating variables. Three new γ Doradus (γ Dor) variables (one is a hot γ Dor star) are detected in this work together with five new rotating variables. An in-depth frequency analysis of the δ Scuti (δ Sct) and γ Dor stars in the sample shows that the frequency spectra are very rich, in particular for the δ Sct-type variables. They present very dense frequency distributions and wide diversity in frequency patterns, even for stars being members of the cluster and with very similar location in the Hertzsprung-Russell (H-R) diagram. Rotational modulation is found for a high percentage of these main-sequence pulsating stars, which is an indication of stellar activity being common on the surfaces of these hot stars. In some cases, activity dominates the luminosity variations. Significant amplitude variability is also detected in at least some of the pulsation modes of highest amplitude in almost all the δ Sct stars. One of the δ Sct pulsators is a member of a binary system with the pulsating component tidally distorted. This system also shows strong stellar activity, including several flares that probably originate in the δ Sct component.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: general - stars: oscillations - stars: rotation - stars: variables: d Scuti

VizieR on-line data: <Available at CDS (J/MNRAS/491/4345): table1.dat tablea1.dat tableb1.dat tableb2.dat tableb3.dat>

Simbad objects: 41

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Number of rows : 41
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 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
2 Cl* NGC 6811 SAN 86 dS* 19 36 51.9256593195 +46 23 20.474984670   11.69 11.400   11.03 F0V 24 0
3 2MASS J19365467+4625036 V* 19 36 54.6774866506 +46 25 03.610365631           F2V 16 0
4 NGC 6811 24 HB* 19 36 57.1290797352 +46 22 42.540001500   12.12 10.9684     G8III 62 0
5 NGC 6811 18 dS* 19 36 58.1892352184 +46 20 22.567557977   12.40 12.101   11.74 A5Vn 26 0
6 KOI-1714 RS* 19 36 59.5524550608 +46 22 26.485577508   14.86 14.054   13.13 G8 33 0
7 2MASS J19365987+4620314 * 19 36 59.8791406608 +46 20 31.504057800           ~ 17 0
8 Cl* NGC 6811 SAN 102 gD* 19 37 01.1821649519 +46 22 59.500197055   13.69 13.290   12.79 F0V 20 0
9 Cl* NGC 6811 SAN 103 * 19 37 01.5911713668 +46 20 25.690868374   12.43 12.158   11.81 A7III 9 0
10 NGC 6811 32 HB* 19 37 02.6825890114 +46 23 13.137775268   12.266 11.318     G8III 51 0
11 NGC 6811 70 dS* 19 37 03.2348717105 +46 19 25.687808906   11.293 10.824 10.783 10.41 F0V 18 0
12 Cl* NGC 6811 SAN 113 dS* 19 37 05.4642467194 +46 24 58.528129274   12.19 11.879   11.52 A9V 23 0
13 Cl* NGC 6811 SAN 119 dS* 19 37 12.4500080184 +46 23 29.338137276   12.97 12.672   12.29 ~ 12 0
14 Cl* NGC 6811 SAN 121 * 19 37 13.7671257768 +46 25 25.768036560   11.87 11.618   11.28 B9 17 0
15 2MASS J19371396+4618245 Ro* 19 37 13.9692263083 +46 18 24.553114708           ~ 18 0
16 Cl* NGC 6811 SAN 127 dS* 19 37 17.0992775647 +46 23 14.681307513   12.03 11.763   11.43 A9V 21 0
17 UCAC4 682-069794 * 19 37 17.6249281080 +46 23 42.355933584   14.422 13.790 13.663   ~ 9 0
18 UCAC4 682-069795 V* 19 37 17.8155468813 +46 19 06.837396731   14.389 13.839 13.712   ~ 14 0
19 UCAC4 683-072646 gD* 19 37 18.8438989128 +46 24 06.372553464   13.700 13.163 13.043   ~ 12 0
20 Cl* NGC 6811 SAN 135 dS* 19 37 21.3837215400 +46 19 53.380880652   12.87 12.571   12.19 ~ 15 0
21 NGC 6811 101 dS* 19 37 21.4807387272 +46 24 33.822260028   11.26 11.092   10.74 ~ 18 0
22 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
23 Cl* NGC 6811 SAN 142 dS* 19 37 22.7453805624 +46 22 53.913916344   13.11 12.742   12.28 ~ 11 0
24 Cl* NGC 6811 SAN 143 dS* 19 37 23.6314490544 +46 23 26.740771620   12.81 12.486   12.06 ~ 13 0
25 NGC 6811 39 dS* 19 37 24.0916939311 +46 23 52.111926655   11.71 11.512   11.09 F0V 22 0
26 Cl* NGC 6811 SAN 147 gD* 19 37 25.2380114270 +46 19 35.587893758   12.62 12.255   11.79 ~ 21 0
27 2MASS J19372667+4621556 * 19 37 26.6774320896 +46 21 55.598588568           ~ 19 0
28 TYC 3556-1504-1 Pe* 19 37 27.0463374742 +46 22 53.693943938   12.82 12.12     kA3hA5mA8 16 0
29 Cl* NGC 6811 SAN 157 dS* 19 37 27.7947876288 +46 23 10.078330380   12.25 12.003   11.65 ~ 17 0
30 Cl* NGC 6811 SAN 158 Ro* 19 37 27.9162328625 +46 22 26.619983007   14.11 13.600   12.96 ~ 9 0
31 2MASS J19372921+4622391 V* 19 37 29.2108944168 +46 22 39.174658356           ~ 12 0
32 Cl* NGC 6811 SAN 165 dS* 19 37 31.2250895179 +46 21 31.922569114   12.21 12.411   12.05 A9V 13 0
33 NGC 6811 113 dS* 19 37 32.1080303024 +46 19 15.003649738   11.807 11.445 11.407 11.09 ~ 30 0
34 Cl* NGC 6811 SAN 172 * 19 37 34.9820937033 +46 20 53.804407254   11.61 11.375   10.86 F2II 25 0
35 2MASS J19374614+4618084 V* 19 37 46.1530729543 +46 18 08.443048535           F3V 14 0
36 2MASS J19374747+4616243 V* 19 37 47.4804288973 +46 16 24.377732080           F5IV 15 0
37 Cl* NGC 6811 SAN 201 gD* 19 37 53.1657756984 +46 18 28.836754812   13.05 12.644   12.14 F1V 10 0
38 NGC 6811 489 dS* 19 37 58.7606555270 +46 14 19.437632456   11.44 11.028   10.544 F0IV 19 0
39 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
40 2MASS J19510883+4012306 dS* 19 51 08.8316452680 +40 12 30.620307420           ~ 13 0
41 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0

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