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From outburst to quiescence: Spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebula

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dc.contributor.author Hernández Santisteban J.
dc.contributor.author Echevarría J.
dc.contributor.author Zharikov S.
dc.contributor.author Neustroev V.
dc.contributor.author Tovmassian G.
dc.contributor.author Chavushyan V.
dc.contributor.author Napiwotzki R.
dc.contributor.author Costero R.
dc.contributor.author Michel R.
dc.contributor.author Sánchez L.
dc.contributor.author Ruelas-Mayorga A.
dc.contributor.author Olguín L.
dc.contributor.author García-Díaz M.
dc.contributor.author González-Buitrago D.
dc.contributor.author De Miguel E.
dc.contributor.author De La Fuente E.
dc.contributor.author De Anda R.
dc.contributor.author Suleimanov V.
dc.date.accessioned 2020-01-21T20:33:27Z
dc.date.available 2020-01-21T20:33:27Z
dc.date.issued 2019
dc.identifier.issn 0035-8711
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/157419
dc.description.abstract © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. 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 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 counts 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 ≲2200K 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.ispartofseries Monthly Notices of the Royal Astronomical Society
dc.subject cataclysmic variables
dc.subject ISM: bubbles.
dc.subject stars: dwarf novae
dc.subject stars: individual: V1838 Aql
dc.subject white dwarf
dc.title From outburst to quiescence: Spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebula
dc.type Article
dc.relation.ispartofseries-issue 2
dc.relation.ispartofseries-volume 486
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 2631
dc.source.id SCOPUS00358711-2019-486-2-SID85068008555


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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