Resumo

RAMIREZ, S. H.; SEGURA MONTERO, O.; MICHEL, R.  e  ECHEVARRIA, J.. New Photometry and Spectroscopy of DW Cancri. Rev. mex. astron. astrofis [online]. 2022, vol.58, n.1, pp.47-60.  Epub 23-Jan-2023. ISSN 0185-1101.  https://doi.org/10.22201/ia.01851101p.2022.58.01.04.

We present new observations of the cataclysmic variable DW Cancri, after the system recovered from a low state. We performed a power spectrum analysis that reveals a clear signal of the 38 min spin period in our photometric data. Our spectroscopic power spectrum search was consistent with studies performed before the low state, showing the orbital and spin modulations. Our Doppler Tomography study exhibits a disc structure and an enhanced asymmetric region, possibly related to a hot spot component. Furthermore, a wavelet transform analysis reveals the 70 min spin-orbit beat period. We interpret these results as an indication of a partial recovery of the system. However, DW Cnc does not yet show all the original photometric modulations reported before the low state. Thus, we propose further observations to elucidate if such original signals require more time to reactivate.

Palavras-chave : novae; cataclysmic variables.

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