2018ApJ...857..119B


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET17:42:59

2018ApJ...857..119B - Astrophys. J., 857, 119-119 (2018/April-3)

Asymmetry of line profiles of stellar oscillations measured by Kepler for ensembles of solar-like oscillators: impact on mode frequencies and dependence on effective temperature.

BENOMAR O., GOUPIL M., BELKACEM K., APPOURCHAUX T., NIELSEN M.B., BAZOT M., GIZON L., HANASOGE S., SREENIVASAN K.R. and MARCHAND B.

Abstract (from CDS):

Oscillation properties are usually measured by fitting symmetric Lorentzian profiles to the power spectra of Sun-like stars. However, the line profiles of solar oscillations have been observed to be asymmetrical for the Sun. The physical origin of this line asymmetry is not fully understood; though, it should depend on the depth dependence of the source of wave excitation (convective turbulence) and details of the observable (velocity or intensity). For oscillations of the Sun, it has been shown that neglecting the asymmetry leads to systematic errors in the frequency determination. This could subsequently affect the results of seismic inferences of the solar internal structure. Using light curves from the Kepler spacecraft, we have measured mode asymmetries in 43 stars. We confirm that neglecting the asymmetry leads to systematic errors that can exceed the 1σ confidence intervals for seismic observations longer than one year. Therefore, the application of an asymmetric Lorentzian profile should be favored to improve the accuracy of the internal stellar structure and stellar fundamental parameters. We also show that the asymmetry changes sign between cool Sun-like stars and hotter stars. This provides the best constraints to date on the location of the excitation sources across the Hertzsprung-Russel diagram.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): methods: data analysis - stars: interiors - stars: oscillations including pulsations

VizieR on-line data: <Available at CDS (J/ApJ/857/119): stars.dat table1.dat>

Simbad objects: 43

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Number of rows : 43

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 173701 PM* 18 44 35.1192273920 +43 49 59.789089625   8.37 7.52     G8V 137 0
2 BD+47 2703 PM* 18 49 33.6588767037 +47 42 39.607284250   10.16 9.54     F9IV-V 37 0
3 BD+43 3102 Ro* 18 51 39.5954267000 +43 38 09.732415288   10.10 9.44     G5V 49 0
4 BD+45 2796 PM* 18 56 21.2644967292 +45 30 53.232987726   9.80 9.29     G0.5IV 70 0
5 HD 176153 Ro* 18 56 36.6478619140 +47 39 23.163197712   9.20 8.68     F9IV-V 66 0
6 HD 176693 Ro* 18 59 08.6846510375 +48 25 23.598982331   9.34 8.83     F8V 102 0
7 TYC 3132-1582-1 * 19 00 06.9396801760 +44 01 45.056884156   11.53 11.05     ~ 18 0
8 HD 177153 PM* 19 01 39.6781881955 +41 29 24.325583971   7.76 7.21     G0 92 0
9 TYC 3541-2345-1 * 19 02 09.8975762830 +45 16 39.354722755   10.90 10.21     G3V 32 0
10 HD 177412 ** 19 02 39.4182581022 +43 07 02.952679093   8.38 7.86     F6IV 48 0
11 BD+38 3428 PM* 19 05 45.2616790117 +38 31 22.560089042   9.77 9.22     F9IV-V 49 0
12 BD+42 3247 PM* 19 06 58.3261704119 +42 26 08.264161006   10.32 9.75     G0.5IV 56 0
13 TYC 3129-1587-1 PM* 19 12 02.2418265719 +42 40 18.806733896   11.49 10.84     ~ 23 0
14 TYC 3121-559-1 * 19 12 16.6298817495 +38 49 03.611425299   10.35 9.75     ~ 28 0
15 TYC 3129-3292-1 * 19 15 08.0776159713 +41 17 55.518976207   11.59 11.00     ~ 20 0
16 HD 180867 * 19 15 54.6869420707 +47 03 40.229155655   8.75 8.24     F6IV 50 0
17 BD+39 3706 PM* 19 16 34.9029087477 +40 02 50.362111184       9.1   G1.5V 64 0
18 HD 234856 Ro* 19 17 45.8021284617 +50 28 48.273320177   9.87 9.32     F9IV-V 67 0
19 HD 181207 PM* 19 17 46.3566541779 +41 24 36.837551319   9.06 8.47     F9IV-V 75 0
20 BD+44 3101 PM* 19 18 33.2047287627 +44 24 16.275460206   11.06 10.37     G2V 31 0
21 BD+43 3221 * 19 20 47.9394314405 +44 09 18.749657280   10.03 9.50     F9IV-V 59 0
22 BD+43 3228 PM* 19 23 56.4114026497 +43 18 52.534860977   10.84 10.15     G0V 48 0
23 BD+41 3338 * 19 24 11.1934178701 +42 03 09.726580716   9.97 9.19     G8IV-V 60 0
24 HD 182756 * 19 24 30.3488994710 +40 19 23.671169678   9.01 8.31     G1V 55 0
25 HD 183298 PM* 19 26 22.0908800928 +50 59 14.333199265   8.71 8.16     G0.5IV 79 0
26 HD 184401 PM* 19 32 14.5965136348 +45 18 38.296572485   9.63 8.95     G5 41 0
27 TYC 3560-2509-1 Ro* 19 33 52.7747006983 +47 02 44.510122069   10.76 10.21     G0V 39 0
28 BD+46 2726 * 19 34 43.0023412508 +46 51 09.934561072   10.36 9.64     K0V 99 0
29 BD+44 3183 PM* 19 35 50.5740210502 +44 52 50.020113052   9.38 8.92     G0IV 49 0
30 TYC 3135-624-1 PM* 19 36 48.8136899967 +38 42 56.787490867   10.35 9.55     G5IV 62 0
31 BD+44 3197 PM* 19 37 54.5253612516 +44 59 04.628808348       9.3   G0IV 62 0
32 TYC 3556-909-1 PM* 19 37 56.6968956803 +45 57 52.271767840   11.31 10.78     F5 36 0
33 TYC 3556-3445-1 Ro* 19 40 21.2108165107 +45 29 20.960913818   10.48 9.91     G3V 59 0
34 HD 186306 PM* 19 41 45.6456419949 +43 44 51.713559249   8.70 7.96     G9V 48 0
35 * 16 Cyg A ** 19 41 48.9539315338 +50 31 30.218780803 6.79 6.59 5.95 5.50 5.17 G1.5Vb 690 1
36 * 16 Cyg B PM* 19 41 51.9731830550 +50 31 03.086127222 7.07 6.86 6.20 5.76 5.42 G3V 811 1
37 KOI-364 Ro* 19 43 29.3537343599 +42 52 52.080705146   10.81 10.13     G2.5IVa 52 0
38 BD+43 3349 Ro* 19 45 23.9646013786 +44 04 35.862805965   10.01 9.51     F6IV 34 0
39 TYC 3565-1235-1 PM* 19 45 45.9641996340 +49 59 18.850030411   10.68 9.84     K1V 29 0
40 HD 187160 SB* 19 46 41.3660194374 +44 20 54.685297711   7.650 7.083     F9IV-V 80 0
41 HD 187637 PM* 19 49 18.1388420406 +41 34 56.857643338       7.2   F8V 92 0
42 BD+46 2785 PM* 19 49 19.9798812910 +46 49 36.015004709   9.68 9.21     F2V 22 0
43 HD 190166 PM* 20 01 51.4250664631 +44 21 14.146704965   10.13 9.58     F8V 44 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-17:42:59

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