J/ApJS/122/221ivo://CDS.VizieR/J/ApJS/122/221doi:10.26093/cds/vizier.21220221CDSMeixner M.Ueta T.Dayal A.Hora J. L.Fazio G. Hrivnak B. J.,Skinner C. J.Hoffmann W. F.Deutsch L. K.2000-02-23T20:03:58Z2000-02-23T21:03:42ZCDS support team

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

cds-question@unistra.frinfrared-sourcesinterstellar-mediumstellar-mass-lossWe present the data from a mid-infrared (MIR) imaging survey of 66 proto-planetary nebula candidates using two MIR cameras (MIRAC2 and Berkcam) at the NASA Infrared Telescope Facility and the United Kingdom Infrared Telescope. The goal of this survey is to determine the size, flux, and morphology of the MIR emission regions, which sample the inner regions of the circumstellar dust shells of protoplanetary nebulae. We imaged these protoplanetary nebulae with narrowband filters({delta}{lambda}/{lambda}{=~}10%) at wavelengths of notable dust features. With our typical angular resolution of 1'', we resolve 17 sources, find 48 objects unresolved, and do not detect one source. For several sources we checked optical and infrared associations and positions of the sources. In table format, we list the size and flux measurements for all of the detected objects and show figures of all of the resolved sources. The proto-planetary nebula candidate sample includes, in addition to the predominant proto-planetary nebulae, extreme asymptotic giant branch stars, young planetary nebulae, a supergiant, and a luminous blue variable. We find that dust shells that are cooler (T{=~}150 K) and brighter in the infrared are more easily resolved. Eleven of the seventeen resolved sources are extended and fall into one of two types of MIR morphological classes: core/elliptical or toroidal. Core/elliptical structures show unresolved cores with lower surface brightness elliptical nebulae. Toroidal structures show limb-brightened peaks suggesting equatorial density enhancements. We argue that core/ellipticals have denser dust shells than toroidals.1999ApJS..122..221Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/122/221CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/122/221https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/122/221http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/122/221https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/122/221https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/122/221http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/122/221GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.6558465556080236e-21 2.1346512726771855e-20InfrareddefaultJ/ApJS/122/221/table3Observed fluxes and sizes of the mid-IR surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameIRAS identificationcharf_Name[d] Indicates the Flux, SizeS, ELS, and PA refer to the entire shellcharm_NameObservation date for multiple wavelength images of an objectcharWave? Wavelength of the imageumfloatnullableFlux? Flux density of the source at WaveJyintnullableSizeS? Size of the source with the major axis at the 50% contour levelarcsecfloatnullableELS? Ellipticity (1-b/a) of the sourcefloatnullablePA? Position angledegintnullablePSFsSize of the Point Spread Function with the major axis at the 50% contour levelarcsecfloatPSFeEllipticity (1-b/a) of the Point Spread FunctionfloatPSFpaPosition angle of the Point Spread FunctiondegintStandStandard star usedcharf_Stand[e] Not a flux calibratorcharJ/ApJS/122/221/refsReferences to table1.datrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSeqSequence of references to table1.datcharBibcodeReference code sequencecharComComments on the referencescharJ/ApJS/122/221/table1Characteristics of Proto-PN in mid-IR surveyF100? IRAS Flux at 100{mu}mJyfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameIRAS identificationcharprimaryn_Name[defghijk] Note on the identification (1)charChemProto PN chemistry: C=carbon rich, O=oxygen rich, C/O=rich in both elementscharSTypeSpectral type of the central starcharVmag? V band magnitude of the central starmagfloatnullableF12IRAS Flux at 12{mu}mJyfloatF25IRAS Flux at 25{mu}mJyfloatF60? IRAS Flux at 60{mu}mJyfloatnullabler_MIRComma-separated numbered references of mid-IR spectra given in refs.datcharDis? Distance the proto PNkpcfloatnullabler_PPNComma-separated Lettered references given in refs.dat (2)char