The Structure and the Partial Opacity of the Spiral Shocks on the Novalike Cataclysmic Variables |
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| Authors: | Christos Papadimitriou Emilios Harlaftis Danny Steeghs |
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| Institution: | (1) Department of Physics, University of Athens, Institute of Astronomy and Astrophysics, National Observatory of Athens, Greece, Athens, Greece;(2) Institute of Space Application and Remote Sensing, National Observatory of Athens, Athens, Greece;(3) Harvard-Smithsonian Center for Astrophysics, Astrophysics, USA |
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| Abstract: | V347 Pup is the first novalike system with clear spiral arms in its accretion disc, as evidenced from its HeI Doppler maps. Combining the Doppler maps of the various lines of the system V347 Pup a more complex structure is revealed on the first arm. On the Doppler maps of HeI λ5875 emission line the first arm splits to two smaller and thinner structures. The Doppler map of HeI λ6678 emission line shows that this line dominates the region of thin structure with higher velocities that we met on the Doppler map of HeI λ5875 emission line. On the contrary the Hα emission line dominates the region of thin structure with lower velocities. We therefore observe, that the Hα emission line dominates on the exterior of the first arm, and the emission line of HeI on the interior. Most of NaI is probably emanated from the white dwarf or from the interior of the disc, and then being absorbed by the spiral shocks. |
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| Keywords: | Accretion Accretion discs Shock waves Stars: Individual V347 Pup Novalike Cataclysmic variables |
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