Astronomy and Astrophysics – Astrophysics
Scientific paper
1994-06-02
Astrophys.J. 431 (1994) L39
Astronomy and Astrophysics
Astrophysics
14 pages, PlainTeX
Scientific paper
10.1086/187483
A possible sound origin for the photospheric oscillations in the X--ray bursting sources 1608-522 and 2127+119 is suggested. It is shown that standing sound waves in an expanding spherical envelope can have periods very close to the observed ones. The quite large ratio, $\sim$ 10, of the periods in the two sources is explained in terms of different wave regimes. The relevance of sound oscillations to the observed QPO in type II bursts of the Rapid Burster is also discussed.
Lapidus Iosif
Nobili Luciano
Turolla Roberto
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