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Query : 2001MNRAS.323..248W |
2001MNRAS.323..248W - Mon. Not. R. Astron. Soc., 323, 248-256 (2001/May-1)
Combination frequencies in the Fourier spectra of white dwarfs.
WU Y.
Abstract (from CDS):
Following Brickhill's proposal, we developed analytical expressions for the amplitudes and phases of these combination frequencies. The parameters that appear in these expressions are the depth of the stellar convection zone when at rest, the sensitivity of this depth towards changes in the stellar effective temperature, the inclination angle of the stellar pulsation axis with respect to the line of sight, and lastly the spherical degrees of the eigenmodes involved in the mixing. Adopting credible values for these parameters, we apply our expressions to DA and DB variable white dwarfs. We find reasonable agreement between theory and observation, although some discrepancies remain unexplained. It is possible to identify the spherical degrees of the pulsation modes using the combination frequencies.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): convection - waves - stars: oscillations - white dwarfs
Simbad objects: 8
Number of rows : 8 |
N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | V* VY Hor | WD* | 03 43 29.0336408736 | -45 49 04.233811368 | 15.16 | 14.91 | 15.28 | DA4.3 | 64 | 0 | ||
2 | V* RY LMi | WD* | 09 24 15.2482279632 | +35 16 51.401570556 | 15.72 | 15.99 | DA4 | 268 | 0 | |||
3 | Ton 1559 | WD* | 13 09 57.6766028952 | +35 09 47.187935136 | 15.51 | 15.2 | DA4.4 | 132 | 0 | |||
4 | GD 165 | WD* | 14 24 39.1495824408 | +09 17 14.160753960 | 14.46 | 14.32 | 14.6 | 14.91 | DA4.1 | 162 | 0 | |
5 | GD 358 | WD* | 16 47 18.3925183824 | +32 28 32.862804384 | 12.511 | 13.530 | 13.653 | 13.752 | 13.852 | DB2 | 349 | 0 |
6 | PG 1707+427 | WD* | 17 08 47.6869215528 | +42 41 00.558430656 | PG1159 | 116 | 0 | |||||
7 | V* V409 And | WD* | 23 27 15.9353097240 | +40 01 23.429781408 | 14.1 | 15.41 | DO | 79 | 0 | |||
8 | V* ZZ Psc | WD* | 23 28 47.6365087803 | +05 14 54.235051503 | 13.17 | 13.0 | DA4.1 | 481 | 0 |
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