J/ApJ/766/116ivo://CDS.VizieR/J/ApJ/766/116doi:10.26093/cds/vizier.17660116CDSHrivnak B.J.Lu W.Sperauskas J.Van Winckel H.Bohlender D.Zacs L.2024-10-25T20:13:46Z2014-12-12T08:32:13ZCDS support team

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

cds-question@unistra.frgiant-starscarbon-starsplanetary-nebulaeinfrared-photometryvisible-astronomyphotometryradial-velocityWe have carried out a detailed observational study of the light, color, and velocity variations of two bright, carbon-rich proto-planetary nebulae, IRAS 22223+4327 and 22272+5435. The light curves are based upon our observations from 1994 to 2011, together with published data by Arkhipova and collaborators. They each display four significant periods, with primary periods for IRAS 22223+4327 and 22272+5435 being 90 and 132 days, respectively. For each of them, the ratio of secondary to primary period is 0.95, a value much different from that found in Cepheids, but which may be characteristic of post-asymptotic giant branch (AGB) stars. Fewer significant periods are found in the smaller radial velocity data sets, but they agree with those of the light curves. The color curves generally mimic the light curves, with the objects reddest when faintest. A comparison in seasons when there exist contemporaneous light, color, and velocity curves reveals that the light and color curves are in phase, while the radial velocity curves are ~0.25 P out of phase with the light curves. Thus they differ from what is seen in Cepheids, in which the radial velocity curve is 0.50 P out of phase with the light curve. Comparison of the observed periods and amplitudes with those of post-AGB pulsation models shows poor agreement, especially for the periods, which are much longer than predicted. These observational data, particularly the contemporaneous light, color, and velocity curves, provide an excellent benchmark for new pulsation models of cool stars in the post-AGB, proto-planetary nebula phase.2013ApJ...766..116Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/766/116CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/211/15 : SiO & H2O maser survey toward AGB+post-AGB stars (Yoon+, 2014)J/PAZh/37/691 : V340 Ser and V448 Lac light curves (Arkhipova+, 2011)J/AZh/88/34 : Long-term (1984-2008) JHKLM phot. of stars (Shenavrin+, 2011)J/ApJ/709/1042 : Variability in C-rich proto-PNe. (Hrivnak+, 2010)J/PAZh/36/281 : Variability of 3 protoplanetary nebulae (Arkhipova+, 2010)J/other/PZ/29.1 : UBV light curves of V354 Lac (Arkhipova+, 2009)J/A+A/469/799 : Torun catalog of post-AGB & related objects (Szczerba+, 2007)J/A+A/458/173 : Optical spectroscopy of 253 IRAS sources (Suarez+, 2006)J/A+A/431/565 : Evolved stars in the MSX survey (Ortiz+, 2005)J/PAZh/26/705 : UBV observations of post-AGB supergiants (Arkhipova+, 2000)J/A+A/323/469 : Optical spectra of post-AGB stars (Bakker+ 1997)J/A+A/299/755 : Stellar evolution. II. Post-AGB (Bloecker+, 1995)J/A+A/267/515 : Very cold C-rich circumstellar envelopes (Omont+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/766/116https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/766/116http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/766/116https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/766/116https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/766/116http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/766/116GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/766/116/table1 (Program objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/766/116/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/766/116/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/766/116/table1?GETtext/xml+votable180.050000true336.130958343.71969440.0055555555555555566/13917 142562.762881831355591e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/766/116?format=asciiOpticalInfrareddefaultJ/ApJ/766/116/table1Program objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS identifier (HHMMm+DDMM; B1950)meta.id;meta.maincharVmag[8.6/9.8] V-band magnitude (variable)magphot.mag;em.opt.VfloatV-Rc[0.5/1.1] V-R_c_ color index (variable) (1)magphot.color;em.opt.V;em.opt.RfloatSpTMK spectral typesrc.spTypecharTeff[5750/6500] Effective temperatureKphys.temperature.effectiveintlogg[0.5/1] Surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H][-0.8/-0.3] Abundance [Fe/H]log(Sun)phys.abund.FefloatC/O[1.2/1.6] C/O abundance ratiophys.abund;arith.ratiofloatRef[1/2] Reference number (2)meta.idintVCShow the Velocity Curvesmeta.ref.urlcharLCShow the Light Curvesmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/766/116/table3Differential standard magnitudes for IRAS 22223+4327recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date; HJD-2400000 (1)dtime.epochdoubledBmag? Differential Magnitude in Bmagphot.mag;arith.difffloatnullabledVmag? Differential Magnitude in Vmagphot.mag;arith.difffloatnullabledRmag? Differential Magnitude in R; Cousinsmagphot.mag;arith.difffloatnullableJ/ApJ/766/116/table4Differential standard magnitudes for IRAS 22272+5435recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date; HJD-2400000 (1)dtime.epochdoubledBmag? Differential Magnitude in Bmagphot.mag;arith.difffloatnullabledVmag? Differential Magnitude in Vmagphot.mag;arith.difffloatnullabledRmag? Differential Magnitude in R; Cousinsmagphot.mag;arith.difffloatnullableJ/ApJ/766/116/table5Radial velocity observations of IRAS 22223+4327InstInstrumentmeta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Inst[a] a=Observations made by R. D. McClure using a K-star maskmeta.notecharHJDHeliocentric Julian Date; HJD-2400000dtime.epochdoubleHRV[-47.4/-33.7] Radial velocitykm/sspect.dopplerVelocfloatJ/ApJ/766/116/table6Radial velocity observations of IRAS 22272+5435recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrumentmeta.id;instrcharn_Inst[a] a=Observations made by R. D. McClure using a K-star maskmeta.notecharHJDHeliocentric Julian Date; HJD-2400000dtime.epochdoubleHRV[-47.4/-33.7] Radial velocitykm/sspect.dopplerVelocfloat