J/AJ/149/184ivo://CDS.VizieR/J/AJ/149/184doi:10.26093/cds/vizier.51490184CDSHrivnak B.J.Lu W.Nault K.A.2024-10-25T20:11:55Z2015-06-22T14:31:44ZCDS support team

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

cds-question@unistra.frplanetary-nebulaegiant-starsinfrared-photometryvisible-astronomybroad-band-photometryWe present new light curves covering 14-19years of observations of four bright proto-planetary nebulae (PPNs), all oxygen-rich and of F spectral type. They each display cyclical light curves with significant variations in amplitude. All four were previously known to vary in light. Our data were combined with published data and searched for periodicity. The results are as follows: IRAS 19475+3119 (HD331319; 41.0days), 17436+5003 (HD161796; 45.2days), 19386+0155 (101.8days), and 18095+2704 (113.3days). The two longer periods are in agreement with previous studies while the two shorter periods each reveal for the first time a dominant period over these long observing intervals. Multiple periods were also found for each object. The secondary periods were all close to the dominant periods, with P_2_/P_1_ ranging from 0.86 to 1.06. The variations in color reveal maximum variations in T_eff_of 400-770K. These variations are due to pulsations in these post-asymptotic giant branch objects. Maximum seasonal light variations are all less than 0.23mag (V), consistent for their temperatures and periods with the results of Hrivnak et al. for 12 C-rich PPNs. For all of these PPNs, there is an inverse relationship between period and temperature; however, there is a suggestion that the period-temperature relationship may be somewhat steeper for the O-rich than for the C-rich PPNs.2015AJ....149..184Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/184CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/766/116 : Variability in proto-PNe. II. (Hrivnak+, 2013; Paper II)J/ApJ/709/1042 : Variability in C-rich proto-PNe. (Hrivnak+, 2010; Paper I)J/PAZh/32/48 : UBV photometry of HD 331319 (Arkhipova+, 2006)J/A+A/458/173 : Optical spectroscopy of 253 IRAS sources (Suarez+, 2006)J/A+AS/126/479 : NIR photometry of IRAS sources. III (Garcia-Lario+, 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/184https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/149/184http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/184https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/149/184https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/149/184http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/149/184GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/149/184/table8 (Results of the period and light curve study of four oxygen-rich Proto-Planetary Nebulae (PPNs))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/149/184/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/149/184/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/149/184/table8?GETtext/xml+votable180.050000true266.231119750.04430060.0055555555555555566/9713 14450 30127 32543https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/149/184?format=asciiOpticalInfrareddefaultJ/AJ/149/184/table8Results of the period and light curve study of four oxygen-rich Proto-Planetary Nebulae (PPNs)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name of the program starmeta.id;meta.maincharprimaryPer1[41/114] Main Perioddtime.period;meta.mainfloatP2/P1[0.8/1.1] The period 2 to period 1 ratiotime.periodfloatr_PprevReference for Pprev (1)meta.ref;pos.framecharPprevPreviously published period(s)dmeta.ref;time.periodcharSpTSpectral typesrc.spTypecharTeff1Effective temperature (2)Kphys.temperature.effectiveintTeff2? Second effective temperature (2)Kphys.temperature.effectiveintnullableDVmag{Delta}V-band magnitude (3)magphot.mag;em.opt.VfloatD(V-R){Delta}(V-Rc) color index (2)magphot.color;em.opt.V;em.opt.RfloatD(B-V){Delta}(B-V) color index (2)magphot.color;em.opt.B;em.opt.VfloatDTeff{Delta}T_eff_ with previous values (2)Kphys.temperature;arith.diffintN1Simbad column added by the CDSmeta.numberintnullableN2Simbad column added by the CDSmeta.numberintnullableLC11994-2007 Light Curvemeta.ref.urlcharLC22007-2012 Light Curvemeta.ref.urlcharComCommentsmeta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.mainJ/AJ/149/184/table4Differential standard VR_c_ magnitudes and colors for the four Proto-Planetary Nebulae (PPNs) from 1994 to 2007recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name of the program star (17436+5003, 18095+2704, 19386+0155, or 19475+3119) (1)meta.id;meta.maincharHJD-VV-band Heliocentric Julian Date (HJD-2400000)dtime.epoch;obs;phot.magdoubleDVmagDifferential V-band magnitude (2)magphot.mag;em.opt.V;arith.difffloatHJD-R? Rc-band Heliocentric Julian Date (HJD-2400000)dtime.epoch;obs;phot.magdoublenullableDRmag? Differential Rc-band magnitude (2)magphot.mag;em.opt.R;arith.difffloatnullableHJD-V-R? V-R_c_ Heliocentric Julian Date (HJD-2400000)dtime.epoch;pos.frame;phot.colordoublenullableD(V-R)? Differential (V-Rc) color index (2)magphot.color;em.opt.V;em.opt.RfloatnullableJ/AJ/149/184/table5Differential standard BVR_c_ magnitudes for the four proto-planetary nebulae (PPNs) from 2007-2012recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS name of the program star (17436+5003, 18095+2704, or 19475+3119) (1)meta.id;meta.maincharHJDHeliocentric Julian Date (HJD-2400000) (2)dtime.epoch;obsdoubleDBmag? Differential B band magnitude (3)magphot.mag;em.opt.B;arith.difffloatnullableDVmag? Differential V band magnitude (3)magphot.mag;em.opt.V;arith.difffloatnullableDRmag? Differential Rc band magnitude (3)magphot.mag;em.opt.R;arith.difffloatnullable