2023MNRAS.524.4196H

Query : 2023MNRAS.524.4196H

2023MNRAS.524.4196H - Mon. Not. R. Astron. Soc., 524, 4196-4211 (2023/September-3)

Unresolved Rossby and gravity modes in 214 A and F stars showing rotational modulation.

HENRIKSEN A.I., ANTOCI V., SAIO H., GRUNDAHL F., KJELDSEN H., VAN REETH T., BOWMAN D.M., PAPICS P.I., DE CAT P., KRUGER J., ANDERSEN M.F. and PALLE P.L.

Abstract (from CDS):

Here, we report an ensemble study of 214 A- and F-type stars observed by Kepler, exhibiting the so-called hump and spike periodic signal, explained by Rossby modes (r modes) - the hump - and magnetic stellar spots or overstable convective (OsC) modes - the spike, respectively. We determine the power confined in the non-resolved hump features and find additional gravity-mode (g-mode) humps always occurring at higher frequencies than the spike. Furthermore, we derive projected rotational velocities from FIES, SONG, and HERMES spectra for 28 stars and the stellar inclination angle for 89 stars. We find a strong correlation between the spike amplitude and the power in the r and g modes, which suggests that both types of oscillations are mechanically excited by either stellar spots or OsC modes. Our analysis suggests that stars with a higher power in m = 1 r-mode humps are more likely to also exhibit humps at higher azimuthal orders (m = 2, 3, or 4). Interestingly, all stars that show g-mode humps are hotter and more luminous than the observed red edge of the δ Scuti instability strip, suggesting that either magnetic fields or convection in the outer layers could play an important role.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): stars: early-type - stars: oscillations - stars: rotation

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

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 - 2026 		#notes
1 * gam Dor gD* 04 16 01.5866224848 -51 29 11.932714356   4.55 4.20     F1V 337 0
2 * del Sct dS* 18 42 16.4268984096 -09 03 09.188922060   5.04 4.71     F2II-III 507 0
3 TYC 3131-538-1 * 18 50 50.4991933968 +43 42 15.351942816   10.61 10.29     A7III 10 0
4 TYC 3127-726-1 V* 18 52 00.8109877128 +41 15 47.401359912   10.98 10.66     ~ 2 0
5 HD 179337 * 19 10 19.3054971408 +41 30 58.417912836   9.54 9.31     A6IV-V 14 0
6 TYC 3121-1076-1 * 19 10 38.1562555896 +38 23 57.112831896   12.40 11.58     A1V 9 0
7 BD+38 3478 * 19 12 28.5269143992 +38 44 51.692254728   10.20 10.06     A4V 16 0
8 BD+45 2858 V* 19 14 10.5209542752 +45 43 16.549285296   10.03 9.66     A9III 13 0
9 HD 180637 * 19 15 08.0740075704 +46 10 25.781011212   9.28 9.29     B9.5V 18 0
10 BD+40 3639 * 19 15 14.7707708928 +40 43 45.300778752   9.42 9.36     A0.5Va+ 22 0
11 HD 180888 * 19 16 01.6625689872 +47 00 11.225939616   9.16 9.05     A2IV 18 0
12 TYC 3129-337-1 Pe* 19 18 29.5989270048 +41 29 36.003045120   12.20 12.37     F2IV 8 0
13 TYC 3134-1831-1 * 19 20 12.3872871696 +38 29 27.202373124   12.39 12.13     A7V 8 0
14 UCAC4 643-069371 V* 19 22 29.5981302702 +38 34 36.711173218   14.197 13.767 13.616   ~ 3 0
15 TYC 3142-1504-1 Pe* 19 22 46.3885144680 +41 19 01.539377112   10.60 10.36     F0V 9 0
16 2MASS J19231896+3730270 Pe* 19 23 18.9711299256 +37 30 26.960480820           kA2hF0mF1SiEu 9 0
17 TYC 3134-1835-1 * 19 23 59.3225909592 +37 31 19.228558836   11.40 11.20     ~ 6 0
18 KOI-5016 Ro* 19 24 15.4194634248 +38 58 14.309152716   10.23 9.99     ~ 19 0
19 BD+42 3334 Pe* 19 25 04.7657391384 +42 41 31.267296348   10.38 10.06     kA3hA7mA7Sr 28 0
20 TYC 3146-398-1 Pe* 19 26 33.5537992056 +43 45 49.453048476   10.13 9.85     A7III 14 0
21 TYC 2666-179-1 V* 19 27 19.0254228552 +37 12 42.278063292   12.49 12.64     F2V 3 0
22 BD+38 3604 * 19 28 17.0362900896 +39 09 14.531776380   10.60 10.53     B9IV 15 0
23 KIC 3238627 V* 19 29 23.3248779170 +38 21 54.121600931           ~ 3 0
24 TYC 2667-800-1 Pe* 19 30 20.9892528888 +37 19 02.088009948   11.89 11.91     A4III 11 0
25 KOI-3185 Pe* 19 31 06.3194961960 +38 23 38.248501524   11.25 10.98     kA5hA8mA9 15 0
26 KOI-6744 Pe* 19 32 20.9944190664 +42 01 28.776857304   10.46 10.17     A5IV 14 0
27 HD 184469 * 19 32 55.9357568688 +39 39 45.727299792   7.67 7.75     B9 27 0
28 BD+39 3825 Pe* 19 35 01.8877324176 +39 45 52.014539556   10.01 9.75     kA2hA5mA8 12 0
29 TYC 3135-286-1 * 19 35 25.3086369048 +39 07 00.824157876   11.52 10.89     F3/F5V 6 0
30 TYC 3139-2394-1 * 19 36 08.9636438832 +40 41 05.479507644   10.34 10.09     ~ 10 0
31 TYC 3135-584-1 V* 19 36 37.0400200752 +38 11 27.298946724   12.18 11.57     ~ 3 0
32 TYC 3139-1375-1 * 19 38 13.0425962592 +39 40 06.569615136   9.96 9.84     A3Van(wkmetA2) 10 0
33 HD 185780 EB* 19 39 07.5551599224 +40 37 36.613931340 6.72 7.63 7.72     B0III 65 0
34 HD 185835 Pe* 19 39 10.1898750600 +43 50 22.215125292   7.93 7.97     B7V 27 0
35 BD+38 3705 V* 19 40 50.1171472464 +38 32 27.086715312   10.52 10.11     F0m 10 0
36 HD 186155 PM* 19 40 50.1834564055 +45 31 29.788145729   5.47 5.06     F5II-III 86 0
37 Cl* NGC 6819 P 16 * 19 41 15.8480700576 +40 11 23.211812076   12.86 12.64   12.17 ~ 5 0
38 2MASS J19412571+4048315 V* 19 41 25.7138605272 +40 48 31.557547872           F0IV 3 0
39 TYC 3144-1374-1 V* 19 42 36.8195511168 +42 40 50.564315640   10.48 10.04     F3IV 6 0
40 HD 225504 gD* 19 43 07.5734028192 +38 56 49.890057792   10.64 10.44     A5V 13 0
41 HD 225515 * 19 43 13.2126231840 +39 32 32.103826116   11.31 11.16     A2V 14 0
42 HD 225570 * 19 44 01.9185476592 +38 52 58.510011216   11.23 11.25     A0V 11 0
43 TYC 3561-1825-1 * 19 46 31.2718454352 +48 07 09.029329320   10.60 10.40     A8III 10 0
44 2MASS J19465544+4743406 * 19 46 55.4372823216 +47 43 40.615236228           ~ 4 0
45 HD 225863 * 19 47 55.1055092784 +39 58 24.043875096   10.36 10.32     B9.5Vn 17 0
46 HD 225912 * 19 48 24.2943135120 +41 16 51.275166312   10.30 10.05     A5V 12 0
47 HD 225971 * 19 49 03.7778890728 +39 32 54.088603260   11.75 11.63     A4V 10 0
48 TYC 3149-1833-1 * 19 51 18.7651057560 +43 34 09.823122228   10.40 10.14     ~ 10 0
49 BD+42 3509 * 19 53 13.8386533512 +42 24 27.104721408   10.64 10.45     A2 9 0
50 HD 226527 * 19 54 48.6846633288 +41 08 38.823617184   10.74 10.69     ~ 13 0
51 HD 226893 * 19 58 20.1725560392 +40 43 58.294755732   10.745 10.654 10.696   ~ 9 0
52 HD 190165 gD* 20 01 46.7156874888 +45 28 35.844023964 7.940 7.840 7.530     kA3hF0.5mF3(III)Am 38 0
53 HD 190318 * 20 02 31.9308800280 +45 04 35.893915896   10.27 10.10     A0 12 0
54 HD 190735 V* 20 04 31.8979095912 +44 59 03.821004492   9.09 8.80     A2 5 0
55 GSC 03162-00665 Er* 20 06 15.4526521026 +44 27 24.790869158   12.82 12.01 11.75   F3V 159 0

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