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 |
|