* Astronomy

Blobrana · L

RE: TT Arietis

Blobrana · L

Title: Fifty Years of TT Arietis
Author: J. Smak

Results of photometric observations of the permanent negative superhumper TT Ari in 1961/62 and 1966 are presented. Together with data from the literature they are used to discuss the negative superhump amplitudes AnSH and the amplitudes Abeat of the modulation with the beat period Pbeat. Both amplitudes are shown to vary considerably from one season to another. Three correlations are found: (1) between AnSH and Abeat, (2) between AnSH and PnSH, and (3) between Abeat and Pbeat.

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Blobrana · L

VY Sculptoris-class TT Arietis is starting to enter its minimum.
The binary system is currently at magnitude 14.2 (according to observations by G. Poyner, England), from magnitude 10.2
The cataclysmic variable last entered its 3.5 year minimum between 1982 and 1985, where it reached magnitude 15.5

Position(2000): RA 02 06 53.08, Dec +15 17 42.0

Light curve

Blobrana · L

TT Arietis has started to fade

Blobrana · L

Title: TT Arietis - Observations of a Cataclysmic Variable Star with the MOST Space Telescope
Authors: J.Weingrill, G.Kleinschuster, R.Kuschnig, J.M.Matthews, A.Moffat, S.Rucinski, D.Sasselov, W.W.Weiss

We measured the photometric flux of the cataclysmic variable TT Arietis (BD+14 341) using the MOST space telescope. Periodic oscillations of the flux reveal the orbital period as well as other features of this binary system. We applied a Discrete Fourier Transform (DFT) on a reduced dataset to retrieve the frequencies of TT Arietis. The analysis of the system revealed a photometric period of 3.19 hours. Though the MOST data has a high cadence of 52.8 seconds, a fine structure of the accretion disk is not obvious.

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