J/AJ/167/30ivo://CDS.VizieR/J/AJ/167/30doi:10.26093/cds/vizier.51670030CDSHrivnak B.J.Lu W.Henson G.Hillwig T.C.2025-03-27T20:09:43Z2024-05-13T09:06:31ZCDS support team

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

cds-question@unistra.frnebulaemultiple-starsinfrared-photometryvisible-astronomyphotometryNew observations are presented of four evolved objects that display long, multiyear variations in their light curves. These are interpreted as good evidence of their binary nature, with the modulation caused by the barycenter motion of the evolved star resulting in a periodic obscuration by a circumbinary disk. Although protoplanetary nebulae (PPNe) commonly possess bipolar nebulae, which are thought to be shaped by a binary companion, there are very few PPNe in which a binary companion has been found. Three of the objects in this study appear to be PPNe, IRAS07253-2001, 08005-2356, and 17542-0603, with long periods of 5.2, 6.9, and 8.2yr, respectively. The binary nature of IRAS08005-2356 has recently been confirmed by a radial velocity study. Two samples, one of PPNe and the other of post-AGB star candidates, are investigated for further evidence on how common is a long- period light-curve variation. Both samples suggest such light-curve variations are not common. The fourth object, IRAS20056+1834 (QY Sge), is an obscured RV Tau variable of the RVb subclass, with a long period of 3.9yr and pulsation periods of 102.9 and 51.5days. The period of this object is seen to vary by 2%. Evidence is presented for a recent mass ejection in IRAS17542-0603.2024AJ....167...30Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/30CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/118 : UBVRI standards around Celestial Equator (Landolt 1983)II/183 : UBVRI Photometric Standards (Landolt 1992)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)J/A+AS/90/327 : 1612MHz OH IRAS point sources (te Lintel Hekkert+ 1991)J/AJ/126/2971 : UBVRI photometry of 131 Herbig Ae/Be (Vieira+, 2003)J/A+A/458/173 : Optical spectroscopy of 253 IRAS sources (Suarez+, 2006)J/A+A/496/813 : Binary PNe towards the Galactic bulge (Miszalski+, 2009)J/ApJ/709/1042 : Variability in C-rich proto-PNe. (Hrivnak+, 2010)J/ApJ/766/116 : Variability in proto-PNe. II. (Hrivnak+, 2013)J/A+A/563/L10 : BD+33 2642 & HD112313 radial velocities (Van Winckel+, 2014)J/ApJS/211/15 : SiO & H2O maser survey AGB & post-AGB stars (Yoon+, 2014)J/MNRAS/447/1673 : Galactic post-AGB stars distances (Vickers+, 2015)J/ApJ/832/125 : BVRI photometric obs. of PNe NGC6337 & Sp 1 (Hillwig+, 2016)J/A+A/588/A25 : Post-AGB & CSPNe evolutionary model (Miller Bertolami, 2016)J/A+A/600/L9 : NGC 1514 and LoTr 5 radial velocity curves (Jones+, 2017)J/A+A/597/A129 : Galactic RV Tauri stars velocities (Manick+, 2017)J/AJ/156/300 : Velocity & light curve analysis of 3 PPNe (Hrivnak+, 2018)J/A+A/620/A85 : Binary post-AGB stars radial velocities (Oomen+, 2018)J/ApJS/249/18 : The ZTF catalog of periodic variable stars (Chen+, 2020)J/ApJ/901/9 : Va in protoplanetary nebulae. VII. 5 LCs (Hrivnak+, 2020)J/AJ/159/21 : V and Rc light curves of medium-bright PPNe (Hrivnak+, 2020)J/A+A/642/A108 : PN G283.7-05.1 BVRI and RV curves (Jones+, 2020)J/MNRAS/508/2226 : Binary central star of V510 Pup (Manick+, 2021)J/A+A/658/A36 : Transition disks around evolved stars (Kluska+, 2022)J/MNRAS/516/L61 : Galactic post-AGB stars in Gaia DR3 (Oudmaijer+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/167/30https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/167/30http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/167/30https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/167/30https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/167/30http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/167/30GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/167/30/objects (Observed objects (built with table1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/30/objects?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/30/objects?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/30/objects?GETtext/xml+votable180.050000true120.669583-24.0786110.0055555555555555566/12948 29646 40492https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/167/30?format=asciiOpticalInfrareddefaultJ/AJ/167/30/objectsObserved objects (built with table1)SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASTarget IRAS identifiermeta.id;meta.maincharprimary2MASS2MASS identifiermeta.idcharRAJ2000[8/20] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainNobsNumber of observationsmeta.numberintnullableDmagInteractive Plotmeta.ref.urlcharJ/AJ/167/30/tablea2Differential standard magnitudesIRASIRAS ID of PPN Targetmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDV[49557/58313]? Heliocentric Julian Date, V band observation HJD-2400000dtime.epochdoublenullablemagV[-1.44/1.14]? Differential magnitude in V, offset included (1)magphot.mag;arith.difffloatnullableHJDR[49883/58313]? Heliocentric Julian Date, Rc band observation HJD-2400000dtime.epochdoublenullablemagRc[-1.673/1.145]? Differential magnitude in Rc, offset included (1)magphot.mag;arith.difffloatnullableTelTelescope-Detector-Filter system code (2)meta.id;instr.telchar