Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...569..418w&link_type=abstract
The Astrophysical Journal, Volume 569, Issue 1, pp. 418-422.
Astronomy and Astrophysics
Astronomy
13
Accretion, Accretion Disks, Stars: Novae, Cataclysmic Variables, Stars: Individual: Constellation Name: Tt Arietis
Scientific paper
We report the photometry and spectroscopy of TT Arietis around the turn of the millennium, when the nova-like variable is in high state. A positive superhump since 1997 still exists. A more precise orbital period than before, 0.13755040+/-1.7×10-7 days, is established. The intensity of the Balmer emission core is found to modulate at the superhump period rather than the orbital period and 180° out of phase with continuum. The intensity of Balmer absorption wings is approximately proportional to the continuum flux. The correlation between Balmer lines and continuum provides a new clue to the study of sources of continuum and emission lines. The mass ratio of the binary is found to be in the range of 0.19+/-0.04, which lends strong support to the proposition that superhumps arise from the inner Lindblad 3:1 resonance in TT Ari, as in superoutbursts of SU UMa stars.
Ding Yuerong
Li Zili
Li Zong-yun
Wu Xiao-an
Zhang Zhousheng
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