J/MNRAS/383/845ivo://CDS.VizieR/J/MNRAS/383/845doi:10.26093/cds/vizier.73830845CDSMennickent R.Greiner J.Arenas J.Tovmassian G.Mason E.Tappert C.,Papadaki C.2024-07-06T20:15:23Z2009-04-03T14:07:18ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frcataclysmic-variable-starsspectroscopyWe present new optical spectroscopy and photometry, Two-Micron All-Sky Survey (2MASS) infrared observations and 24yr of combined American Association of Variable Star Observers (AAVSO) and Association Francaise des Observateurs d'Etoiles Variables (AFOEV) photometry of the symbiotic star candidate AE Cir. The long-term light curve is characterized by outbursts lasting several years and having a slow decline of ~2x10^-4^mag/d. The whole range of variability of the star in the V band is about 4mag. The periodogram of the photometric data reveals strong signals at ~342 and 171d. The presence of the emission feature at {lambda}6830{AA} at minimum and the detection of absorption lines of a ~K5 type star confirm the symbiotic classification and suggest that AE Cir is a new member of the small group of s-type yellow symbiotic stars. We estimate a distance of 9.4kpc. Our spectrum taken at the high state shows a much flatter spectral energy distribution, the disappearance of the {lambda}6830{AA} emission feature and the weakness of the HeII 4686 emission relative to the Balmer emission lines. Our observations indicate the presence of emission-line flickering in time-scales of minutes in 2001. The peculiar character of AE Cir is revealed in the visibility of the secondary star at the high and low state, the light curve resembling a dwarf nova superoutburst and the relatively short low states. The data are hard to reconciliate with standard models for symbiotic star outbursts.2008MNRAS.383..845Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/383/845CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/383/845https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/383/845http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/383/845https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/383/845https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/383/845http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/383/845GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/MNRAS/383/845/table2The emission lines observed in the spectra of AE CirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIon designation (or Unknown)meta.id;phys.atmol.ionStagecharlambda? Laboratory wavelength0.1nmem.wldoublenullablelambdaO? Observed wavelength0.1nmem.wldoublenullableEW2007? Equivalent width measured in 2007 spectra0.1nmspect.line.eqWidthfloatnullablen_EW2007[*] Merged equivalent width (1)meta.notecharEW2001? Equivalent width measured in 2001 spectra0.1nmspect.line.eqWidthfloatnullablen_EW2001[*] Merged equivalent width (1)meta.notecharEW2000? Equivalent width measured in 2000 spectra0.1nmspect.line.eqWidthfloatnullablen_EW2000[*] Merged equivalent width (1)meta.notecharGFWHM? Full width at half maximum (2)km/sspect.line.widthintnullableRV? Radial velocity at the line centre with respect to the LSR (2)km/sspect.dopplerVelocintnullableXion? Ionization potential (2)eVphys.energy;phys.atmol.ionizationfloatnullableI/Ic? Maximum line intensity normalized to the continuum (2)spect.line.intensity;stat.maxfloatnullableFlag[ab? nr] Flag on the line (3)meta.code.errorcharNoteNotemeta.notechar