J/ApJ/813/29ivo://CDS.VizieR/J/ApJ/813/29doi:10.26093/cds/vizier.18130029CDSSchmidt E.G.2017-11-29T11:49:23Z2016-03-14T14:55:18ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-sourcesSpectral energy distributions for 132 classical and type II Cepheids were searched for evidence of excess flux above the photospheric level in the mid-infrared. Eight of them were found to have unambiguously strong excess emission while a further 13 showed evidence of weak emission. The presence of emission appears to be unrelated to either the pulsational amplitude or the effective temperature while strong emission is limited to stars with periods longer than 11 days, with a single exception. For the stars with strong emission we attempted to fit the energy distribution with a stellar wind model. No acceptable fit could be found for silicate grains. With graphite or iron grains we could only obtain an acceptable fit if the maximum dust temperature was significantly lower than the condensation temperature. We conclude that the excess emission is not evidence of mass loss.2015ApJ...813...29Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/813/29CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)II/328 : AllWISE Data Release (Cutri+ 2013)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/150/13 : Cepheid Radial Velocities (CRaV) project (Evans+, 2015)J/A+A/576/A30 : NIR light-curve templates for classical Cepheids (Inno+, 2015)J/AJ/146/61 : Type II Cepheid candidates. IV. NSVS sources (Schmidt+, 2013)J/MNRAS/429/385 : Short-period variables near GC (Matsunaga+, 2013)J/AJ/142/187 : HST observations of 7 Pop.II variable stars (Benedict+, 2011)J/AJ/141/53 : Lick indices of type II Cepheid candidates (Schmidt+, 2011)J/AcA/60/91 : VI light curves of SMC type II Cepheids (Soszynski+, 2010)J/AJ/139/2300 : BVIc light curves of 3 type II Cepheids (Rabidoux+, 2010)J/MNRAS/397/933 : LMC type II Cepheids JHKs magnitudes (Matsunaga+, 2009)J/AJ/137/4598 : VR light curve of ASAS-North Cepheids (Schmidt+, 2009)J/AJ/133/665 : Photometry of type II Cepheid candidates (Schmidt+, 2007)J/A+A/453/155 : Extended envelopes around Galactic Cepheids II. (Merand+, 2006)J/AJ/130/832 : VR photometry of type II Cepheids. III (Schmidt+, 2005)J/AJ/129/2007 : Photometry of type II Cepheids. II (Schmidt+, 2005)J/AJ/128/1748 : VR photometry of type II Cepheids (Schmidt+, 2004)http://www.aavso.org/vsx/ : International Variable Star Index (VSX) home pagehttp://www.astro.utoronto.ca/DDO/research/cepheids/cepheids.html : DDO databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/813/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/813/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/813/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/813/29https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/813/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/813/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/813/29/table1 (The program stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/813/29/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/813/29/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/813/29/table1?GETtext/xml+votable180.050000true224.556812233.952550.0055555555555555566/227 375 390 1249 1411 1421 1432 1551 1829 2365 2675 2684 2716 2799 3022 3052 3060 3131 3285 3459 4252 4392 4813 5591 6371 6386 6811 7320 8584 9166 9207 9356 9462 9480 9528 9765 9812 9950 10066 10352 11007 11161 12321 12436 12715 12846 12872 12904 13164 13421 13814 13955 14265 14321 14324 14328 14384 14388 14411 14427 14457 14462 14480 14559 14562 14690 14724 14736 15043 15461 15585 15618 15625 15652 15698 15959 18405 19415 19860 20158 21630 22114 22149 22207 22894 23234 23332 23727 23841 24153 25833 25869 26029 27089 27949 28046 28592 29145 29758 29852 29881 30108 30225 30239 30553 30580 30588 30646 30672 30927 31015 31042 31057 31173 31192 31339 31744 31778 31792 31799 31862 31866 31883 31918 31979 32012 32052 32064 32170 32607 32739 36705 44786 48555 48880https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/813/29?format=asciiInfrareddefaultJ/ApJ/813/29/table1The program starsNotesNotes (6)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of star (1)meta.id;meta.maincharStarPreliminary designation of star (2)meta.idcharZTypeCepheid type from Schmidt 2013, J/AJ/146/611, ("Class"=classical or "Type II")meta.note;src.morph.typecharVSXTypeVariable star type from the VSX (B/vsx) (3)meta.code;src.varcharPer[0.8/96] Pulsation perioddtime.periodfloatE(B-V)[0/1.8] Adopted color excessmagphot.color.excessfloatr_E(B-V)Reference code for E(B-V) (4)meta.ref;pos.frameintEm[A-D] Emission category (A=unambiguous excess IR emission) (5)meta.codecharSCatDisplay data within 2" from Schmidt+ (2007, J/AJ/133/665; 2009, J/AJ/137/4598; 2011, J/AJ/141/53 and 2013, J/AJ/146/61)meta.ref.urlintnullableGCVSDisplay the GCVS data within 3" (B/gcvs)meta.ref.urlintnullableVSXDisplay the VSX data within 3" (B/gcvs)meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions provided by the author (right ascension part)degpos.eq.ra;meta.main_DEPositions provided by the author (declination part)degpos.eq.dec;meta.main