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SN 2003aw: P=2034s Dear Colleagues, Woudt and Warner report in IAUC No. 8085 that they detected a periodic signal of 2034s (amplitude 0.1 mag). From this peridicity and the spectroscopic description, they suggested that the object is a double- degenerate helium-transferring binary (AM CVn star). The period is supposed to reflect superhumps. Woudt and Warner also reported the existence of shallow eclipses. If this feature is confirmed, the object is the first AM CVn star with eclipses (please note that there have been arguements whether AM CVn stars are binaries or single stars; the unambiguous identification of eclipses will present the final conclusion). There is, however, slight diference of the outburst behavior of this object from the other "dwarf nova-type" AM CVn stars, particularly in its long duration of outburst. This difference also needs to be clarified by further observations. We therefore request further follow-up observations, although the object is a bit faint (V = 18.3). Regards, Taichi Kato VSNET Collaboration team
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
