XMM-Newton observations of three short period polars: V347 Pav, GG Leo and EU UMa

Details XMM-Newton observations of three short period polars: V347 Pav, GG Leo and EU UMa XMM-Newton observations of three short period polars: V347 Pav, GG Leo and EU UMa

2003-09-03

arxiv.org/abs/astro-ph/0309110v1

Mon.Not.Roy.Astron.Soc.347:95,2004

Astronomy and Astrophysics

Astrophysics

accepted MNRAS

Scientific paper

10.1111/j.1365-2966.2004.07242.x

We present phase-resolved XMM_Newton data of three short period polars: V347 Pav, GG Leo and EU UMa. All three systems show one dominant accretion region which is seen for approximately half of the orbital cycle. GG Leo shows a strong dip feature in its X-ray and UV light curves which is due to absorption of X-rays from the accretion site by the accretion stream. The emission in the case of EU UMa is dominated by soft X-rays: its soft/hard X-ray ratio is amongst the highest seen in these objects. In contrast, GG Leo and V347 Pav shows a ratio consistent with that predicted by the standard shock model. We infer the mass of the white dwarf and explore the affect of restricting the energy range on the derived parameters.

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