Table 1

Characteristics of the main oscillation modes extracted from the simulations of an accretion column onto a 0.8 M white dwarf with an accretion rate = 1 g/cm2/s and for different magnetic field strengths.


Mode a Mode b Mode c

ϵ s B x s,m ν L X L c ν L X L c ν L X L c L X L c
[MG] [107 cm] [Hz] [Hz] [Hz] tot tot

0 0 10.95 0.664 0.337 ... 1.11 0.026 ... ... 0.362 ...
0.01 1.3 10.91 0.674 0.367 0.126 1.11 0.024 0.013 0.376 0.168
0.05 2.2 10.72 0.684 0.300 0.114 1.38 0.025 0.071 0.391 0.168
0.1 2.8 10.49 0.703 0.331 0.143 1.41 0.036 0.050 ... ... ... 0.391 0.145
0.3 4.2 9.72 0.781 0.126 0.058 1.55 0.040 0.012 1.85 0.059 0.008 0.185 0.110
0.5 5.0 9.10 0.830 0.095 0.079 1.65 0.013 0.007 1.96 0.054 0.016 0.199 0.100
0.7 5.6 8.59 0.869 0.009 0.008 ... ... ... 2.041 0.141 0.043 0.143 0.044
1 6.4 7.95 ... ... ... ... ... ... 2.18 0.122 0.044 0.123 0.045
1.2 6.8 7.60 ... ... ... ... ... ... 2.26 0.068 0.027 0.069 0.028
1.5 7.4 7.15 ... ... ... ... ... ... ... ... ... ... ...

Notes. The first column gives the value of the ratio ϵs defined in Eq. (8), the second column gives the corresponding magnetic field strength considering an accretion surface of S = 1015 cm2, and the third column gives the value of the theoretical stationary shock height. The subsequent columns give for the first three main modes (a, b, and c), the frequency and the relative amplitude of the oscillations in the (0.510 keV) X-ray range (LX) and the optical cyclotron flux (Lc). The last two columns give the quadratic mean value of the relative amplitude integrated over all the oscillation modes, including those not reported in the table.

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