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dc.contributor.authorHernández Santisteban, J. V.
dc.contributor.authorEchevarría, J.
dc.contributor.authorZharikov, S.
dc.contributor.authorNeustroev, V.
dc.contributor.authorTovmassian, G.
dc.contributor.authorChavushyan, V.
dc.contributor.authorNapiwotzki, R.
dc.contributor.authorCostero, R.
dc.contributor.authorMichel, R.
dc.contributor.authorSánchez, L. J.
dc.contributor.authorRuelas-Mayorga, A.
dc.contributor.authorOlguín, L.
dc.contributor.authorGarcía-Díaz, Ma T.
dc.contributor.authorGonzález-Buitrago, D.
dc.contributor.authorde Miguel, E.
dc.contributor.authorde la Fuente, E.
dc.contributor.authorde Anda, R.
dc.contributor.authorSuleimanov, V.
dc.identifier.citationHernández Santisteban , J V , Echevarría , J , Zharikov , S , Neustroev , V , Tovmassian , G , Chavushyan , V , Napiwotzki , R , Costero , R , Michel , R , Sánchez , L J , Ruelas-Mayorga , A , Olguín , L , García-Díaz , M T , González-Buitrago , D , de Miguel , E , de la Fuente , E , de Anda , R & Suleimanov , V 2019 , ' From outburst to quiescence : spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebula ' Monthly Notices of the Royal Astronomical Society , vol. 486 , no. 2 , pp. 2631-2642 .
dc.identifier.otherPURE: 261033007
dc.identifier.otherPURE UUID: 0f5911f2-fb24-4a29-8b28-70f07b97fd2f
dc.identifier.otherBibCode: 2019MNRAS.486.2631H
dc.identifier.otherScopus: 85068008555
dc.identifier.otherORCID: /0000-0002-6733-5556/work/61370236
dc.description.abstractWe 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 its subsequent quiescent state. An extended emission around the source was observed up to 30 d after the peak of the superoutburst, interpreted it as a bow shock formed by a quasi-continuous outflow from the source in quiescence. The head of the bow shock is coincident with the high-proper motion vector of the source (v⊥ = 123 ± 5 km s−1) at a distance of d = 202 ± 7 pc. The object was detected as a weak X-ray source (0.015 ± 0.002 counts s−1) in the plateau of the superoutburst and its flux lowered by two times in quiescence (0.007 ± 0.002 count s-1). Spectroscopic observations in quiescence we confirmed the orbital period value Porb = 0.0545 ± 0.0026 d, consistent with early-superhump estimates, and the following orbital parameters: γ = −21 ± 3 km s−1 and K1 = 53 ± 3 km s−1. The white dwarf is revealed as the system approaches quiescence, which enables us to infer the effective temperature of the primary Teff = 11 600 ± 400 K. The donor temperature is estimated ≲2200 K and suggestive of a system approaching the period minimum. Doppler maps in quiescence show the presence of the hotspot in He i line at the expected accretion disc-stream shock position and an unusual structure of the accretion disc in Hα.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at /
dc.subjectCataclysmic variablesen
dc.subjectStars: dwarf novaeen
dc.subjectWhite dwarfen
dc.subjectStars: individual: V1838 Aqlen
dc.subjectISM: bubblesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleFrom outburst to quiescence : spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebulaen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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