Abstract

ECHEVARRIA, J. et al. Extensive photometry of V1838 Aql during the 2013 superoutburst. Rev. mex. astron. astrofis [online]. 2019, vol.55, n.1, pp.21-30. ISSN 0185-1101.

We present an in-depth photometric study of the 2013 superoutburst of the recently discovered cataclysmic variable V1838 Aql and subsequent photometry near its quiescent state. A careful examination of the development of the superhumps is presented. Our best determination of the orbital period is PORB = 0.05698(9) days, based on the periodicity of early superhumps. Comparing the superhump periods at stages A and B with the early superhump value we derive a period excess of $\in$= 0.024(2) and a mass ratio of q = 0.10(1). We suggest that V1838 Aql is approaching the orbital period minimum and thus has a low-mass star as a donor instead of a substellar object.

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