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A white dwarf with a low magnetic field in the IP RXJ0028.8+5917/V709Cas | | J.M. Bonnet-Bidaud
; M. Mouchet
; D. de Martino
; G. Matt
; C. Motch
; | | Date: |
1 Oct 2001 | | Subject: | astro-ph | | Affiliation: | Service d’Astrophysique, CE Saclay, France, Obs. de Paris-Meudon, France, Osservatorio Astronomico di Napoli, Italy, Universita Roma Tre, Roma, Italy, Observatoire de Strasbourg, France | | Abstract: | We report the first detailed spectroscopic observations of the recently identified intermediate polar RXJ0028.8+5917/V709 Cas. We discovered that the system shows significant EW ~ (2-4)A broad absorptions, affecting the Balmer lines from Hdelta to Hbeta. These broad absorptions are interpreted as the contribution of an underlying DA logg=8 white dwarf at a temperature of ~ 23 000 K, contributing ~ 17 % (at 4500 A) to the overall flux. This is the first direct detection of a white dwarf in an intermediate polar system. The absence of significant Zeeman splitting indicates a magnetic field lower than 10 MG, confirming that, at least in some cases, intermediate polars have weaker fields than polars. | | Source: | arXiv, astro-ph/0110036 | | Services: | Forum | Review | PDF | Favorites | |
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