Towards Asteroseismology of PG1605+072

Details Towards Asteroseismology of PG1605+072 Towards Asteroseismology of PG1605+072

2008-04-07

arxiv.org/abs/0804.1006v1

Astronomy and Astrophysics

Astrophysics

to appear in "Hot Subdwarf Stars and Related Objects", ASPC Volume Nr. 392 p.327

Scientific paper

We present our attempt to characterise the frequency spectrum of the bright V 361 Hya star PG1605$+$072 from atmospheric parameter and radial velocity variations through a spectroscopic approach. Therefore we used time resolved spectroscopy ($\approx$9000 spectra) to detect line profile variations from which variations of the effective temperature and gravity, together with their phases, are extracted by means of a quantitative spectral analysis. The theoretical modelling of adequate pulsation modes with the \textit{BRUCE} and \textit{KYLE} codes allows to derive constraints on the mode's degree and order from the observed frequencies.

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