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• W2899549592 abstract "We analyse new optical spectroscopic, direct-image and X-ray observations of the recently discovered a high proper motion cataclysmic variable V1838 Aql. The data were obtained during its 2013 superoutburst and when the source came back to quiescence. The object was detected as a weak X-ray source ($0.01103pm0.0014$ counts s$^{-1}$) in the plateau of the superoutburst and its flux dropped sharply at the end of the fading stage ($0.0006pm0.0005$ counts s$^{-1}$). An extended emission around the source was observed up to 30 days after the peak of the superoutburst, interpreted it as a bow-shock formed by a wind from the source. The head of the bow-shock is coinciding with the high-proper motion vector of the source ($v_{perp}=123pm5$ km s$^{-1}$) at a distance of $d=202pm7$ pc. From spectroscopic observations in quiescence we confirmed the orbital period value $P_{rm{orb}}=0.0545pm 0.0026$ days, consistent with early-superhump estimates, and the following orbital parameters: $gamma= -21pm3$ km s$^{-1}$ and $K_1 = 53pm3$ km s$^{-1}$. The white dwarf is revealed when the system approaches quiescence, which enables us to infer the effective temperature of the primary $T_{eff}=11,600pm400$K. The donor temperature of V1838 Aql is estimated to be $lesssim 2200$K and suggestive of a system approaching the period minimum. Doppler maps of the system in quiescence show the presence of the bright hot spot in HeI line at the expected accretion disc-stream shock position and an unusual structure of the accretion disc in H$alpha$." @default.
• W2899549592 created "2018-11-16" @default.
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• W2899549592 date "2018-11-06" @default.
• W2899549592 modified "2023-10-18" @default.
• W2899549592 title "From outburst to quiescence: spectroscopic evolution of the high-proper motion cataclysmic variable V1838 Aql" @default.
• W2899549592 hasPublicationYear "2018" @default.
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