Far-UV FUSE spectra of peculiar magnetic cataclysmic variables

被引:0
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作者
Mouchet, M [1 ]
Bonnet-Bidaud, JM [1 ]
Roueff, E [1 ]
Abada-Simon, M [1 ]
Beuermann, K [1 ]
de Martino, D [1 ]
Desert, JM [1 ]
Ferlet, R [1 ]
Fried, R [1 ]
Gansicke, B [1 ]
Howell, S [1 ]
Mukai, K [1 ]
Porquet, D [1 ]
Szkody, P [1 ]
机构
[1] Observ Paris, F-92190 Meudon, France
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P1 [天文学];
学科分类号
0704 ;
摘要
We present far-UV spectra of the three magnetic cataclysmic variables (MCVs) BY Cam, V1309 Ori and AE Aqr obtained with the FUSE satellite. These MCVs have revealed strongly unusual NV and CIV UV resonance lines. The FUSE spectra exhibit broad OVI lines as well as a strong NIII line at 991Angstrom, while the CIII 1175Angstrom line is nearly absent, supporting non-solar CNO abundances of the accreting matter in these sources. The spectrum of BY Cam shows molecular H-2 lines which might be of circumstellar nature. The flaring activity of AE Aqr is also observed in the far-UV range. The radial velocities of the broad OVI components in AE Aqr are orbitally modulated and would indicate an emission region close to the magnetosphere.
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页码:142 / 148
页数:7
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