Comparative analysis of photometric variability of TT ARI in the years 1994–1995 and 2001, 2004

Belova, A. I.; Suleimanov, V.; Bikmaev, I.; Khamitov, I.; Zhukov, G. V.; Senio, D. S.; Belov, I. Yu.; Сахибуллин, Н. А.

doi:10.1134/s1063773713020011

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…Smak & Stepien 1975;Skillman et al 1998;Kraicheva et al 1999;Kim et al 2009;Weingrill et al 2009). Moreover, on rare occasions, positive and negative superhumps in TT Ari have been detected simultaneously (Belova et al 2013), further expanding similarities between TT Ari and AQ Men. Armstrong et al (2013) discovered that the eclipses in AQ Men change their depth significantly between orbital cycles.…”

Section: The Superhumps and Superorbital Signal Evolutionmentioning

confidence: 76%

Exploring the tilted accretion disc of AQ Men with TESS

Iłkiewicz

Scaringi

Court

et al. 2021

Monthly Notices of the Royal Astronomical Society

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AQ Men is a nova-like variable which is presumed to have a tilted, precessing accretion disc. Grazing eclipses in this system have been speculated to be useful in exploring the geometry of its accretion disc. In this work we analysed TESS observations of AQ Men, which provide the best light curve of this object thus far. We show that the depths of the eclipses are changing with the orientation of the accretion disc, which means that they can serve as a direct test of the tilted accretion disc models. The precession period of the accretion disc is increasing during the TESS observations. However, it is still shorter than the period determined in the previous studies. The amplitude of the variability related to the precession of the accretion disc varies, and so does the shape of this variability. Moreover, we have detected a positive superhump that was previously unseen in AQ Men. Interestingly, the positive superhump has a strongly non-sinusoidal shape, which is not expected for a nova-like variable.

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Section: The Superhumps and Superorbital Signal Evolutionmentioning

confidence: 76%

Exploring the tilted accretion disc of AQ Men with TESS

Iłkiewicz

Scaringi

Court

et al. 2021

Monthly Notices of the Royal Astronomical Society

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“…The light curves on which the present newly derived value is based are quite noisy, and so is the folded light curve. Moreover, old novae and novalike variables frequently exhibit (positive or negative) superhumps which are unstable over long time scales but in a limited data set may mimick orbital variations Examples include V603 Aql (Haefner & Metz 1985, Bruch 1991, Patterson et al 1993), TT Ari (Belova et al 2013 and references therein; Smak 2013), KR Aur (Kozhevnikov 2007), V751 Cyg (Patterson et al 2001, Papadaki et al 2009), V795 Her (Papadaki et al 2006), and V378 Peg (Kozhevnikov 2012). This issue as well as that of a possible giant nature of the secondary star (Sect.…”

Section: The Photometric Periodmentioning

confidence: 99%

Photometry of some more neglected bright cataclysmic variables and candidates

Bruch

2018

New Astronomy

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As part of an effort to better characterize bright cataclysmic variables (CVs) and related systems which have received little attention in the past light curves of four systems (V504 Cen, KT Eri, Ret 1 and CTCV 2056-3014) are analyzed. For some of these stars no time resolved photometry has been published previously. While flickering is observed in all systems except Ret 1, it is particularly strong in V504 Cen and CTCV 2056-3014. In the latter star, a previously observed 15.4 m period, leading to its tentative classification as an intermediate polar, is probably spurious. Variations on time scales of hundredths of days observed in the pre-outburst light curve of the classical nova KT Eri continue after the outburst but appear not to be strictly periodic. Furthermore, the long term post-outburst light curve exhibits modulations with quasi-periods of quite different length. Thus, these variations cannot be due to aspect related variations in a system with a giant component similar to some recurrent novae. Instead, the system possibly exhibits variations with a period of 0.1952 d which may be orbital. However, any such conclusion still requires confirmation. The absence of flickering in Ret 1 indicates that the system probably does not contain an accretion disk. Instead, the observation of slow variations supports a previous suspicion of low amplitude variability with a period >12 h.

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“…The presence of simultaneous negative and positive superhumps would suggest that the accretion disc of LS Cam is undergoing both apsidal and nodal precession motions. The existence of both periodicities have been observed in a few other systems -TT Ari (Belova et al 2013, Kraicheva et al 1999, AQ Men (I lkiewicz et al 2021), and V603 Aql (Patterson 1997). Suleimanov et al (2004) explore the transition between negative and positive superhumps in V603 Aql.…”

Section: Discussionmentioning

confidence: 84%

Unveiling the multiple periodicities of the cataclysmic variable LS Cam

Stefanov

2021

Preprint

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The obtained power spectra from sectors 19 and 20 show multiple periodicities -orbital variations (P orb = 0.14237 days), slightly fluctuating superorbital variation (Pso ≈ 4.03 days) and permanent negative superhump (P −sh = 0.1375 days). In sector 26 an additional positive superhump (P +sh = 0.155 days) is present. Using relations from literature, the mass ratio and the masses of the two components are estimated to be q = 0.24, M1 = 1.26M ⊙ , and M2 = 0.30M ⊙ respectively.

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Comparative analysis of photometric variability of TT ARI in the years 1994–1995 and 2001, 2004

Cited by 14 publications

References 20 publications

Exploring the tilted accretion disc of AQ Men with TESS

Exploring the tilted accretion disc of AQ Men with TESS

Photometry of some more neglected bright cataclysmic variables and candidates

Unveiling the multiple periodicities of the cataclysmic variable LS Cam

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