Modeling Eclipses of the Novalike Variable TT Triangulum

Details Modeling Eclipses of the Novalike Variable TT Triangulum Modeling Eclipses of the Novalike Variable TT Triangulum

2006-08-18

arxiv.org/abs/astro-ph/0608400v1

Astronomy and Astrophysics

Astrophysics

Submitted to PASP: 37 pages; 9 figures

Scientific paper

10.1086/508555

Multicolor (BVRI) light curves of the eclipsing novalike variable TT Tri are presented and analyzed with a parameter-fitting eclipse model. The mass ratio of TT Tri is poorly constrained, but must lie roughly in the range 0.3>R_1) generally resulted in a higher white dwarf temperature, and a steepening of the disk temperature profile, but were not required to achieve a viable steady-state disk solution. No evidence was found for a luminous bright spot in the system, which is not surprising given the lack of a pre-eclipse "hump" in the light curve. A total of 22 eclipse timings were measured for the system, which yielded an ephemeris for the times of mid-eclipse given by HJD = 2,453,618.953(3) + 0.1396369(4) E. A comparison of the observed brightness and color at mid-eclipse with the photometric properties of the best-fitting model suggests that TT Tri lies at a distance of ~400-500 pc. (abstract abridged)

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