J/AJ/144/187ivo://CDS.VizieR/J/AJ/144/187doi:10.26093/cds/vizier.51440187CDSTurner D.G.van den Bergh S.Younger P.F.Majaess D.J.Pedreros M.H.,Berdnikov L.N.2014-02-27T14:18:20Z2014-02-10T10:10:40ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomybroad-band-photometryphotographic-photometryA photometric UBV survey is presented for 610 stars in a region surrounding the Cepheid AQ Puppis and centered southwest of the variable, based upon photoelectric measures for 14 stars and calibrated iris photometry of photographic plates of the field for 596 stars. An analysis of reddening and distance for program stars indicates that the major dust complex in this direction is ~1.8kpc distant, producing differential extinction described by a ratio of total-to-selective extinction of R=A_V_/E_B-V_=3.10+/-0.20. Zero-age main-sequence fitting for the main group of B-type stars along the line of sight yields a distance of 3.21+/-0.19kpc (V_0_-M_V_=12.53+/-0.13s.e.). The 29.97 Cepheid AQ Pup, of field reddening E_B-V_=0.47+/-0.07 (E_B-V_(B0)=0.51+/-0.07), appears to be associated with B-type stars lying within 5' of it as well as with a sparse group of stars, designated Turner 14, centered south of it at J2000.0=07:58:37, -29:25:00, with a mean reddening of E_B-V_=0.81+/-0.01. AQ Pup has an inferred luminosity as a cluster member of <M_V_>=-5.40+/-0.25 and an evolutionary age of 3x10^7^yr. Its observed rate of period increase of +300.1+/-1.2s/yr is an order of magnitude larger than what is observed for Cepheids of comparable period in the third crossing of the instability strip, and may be indicative of a high rate of mass loss or a putative fifth crossing. Another sparse cluster, designated Turner 13, surrounds the newly recognized 2.59 Cepheid V620 Pup, of space reddening E_B-V_=0.64+/-0.02 (E_B-V_(B0)=0.68+/-0.02), distance 2.88+/-0.11kpc (V_0_-M_V_=12.30+/-0.08s.e.), evolutionary age 10^8^yr, and an inferred luminosity as a likely cluster member of <M_V_>=-2.74+/-0.11. V620 Pup is tentatively identified as a first crosser, pending additional observations.2012AJ....144..187Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/144/187CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)II/285 : Photoelectric observations of Cepheids in UBV(RI)c (Berdnikov, 2008)II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005)J/MNRAS/434/2238 : Cepheids in open clusters (Anderson+, 2013)J/A+A/534/A94 : Milky Way Cepheids radial velocities (Storm+, 2011)J/MNRAS/389/1336 : Reddenings of FGK supergiants & Cepheids (Kovtyukh+, 2008)J/AJ/130/1194 : UBV photometry of Ruprecht 91 (Turner+, 2005)J/A+A/404/423 : BVI photometry of Galactic Cepheids (Tammann+, 2003)J/ApJS/137/209 : BVI observations of southern Cepheids (Berdnikov+, 2001)J/A+AS/143/211 : Galactic Cepheids BVRI photometry (Berdnikov+, 2000)J/A+A/314/541 : Long period Cepheids (Antonello+, 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/144/187https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/144/187http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/144/187https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/144/187https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/144/187http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/144/187GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/144/187/table2 (Photographic data for the AQ Pup field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/144/187/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/144/187/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/144/187/table2?GETtext/xml+votable180.050000true119.0259-29.238916670.0055555555555555566/39771https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/144/187?format=asciiOpticaldefaultJ/AJ/144/187/table2Photographic data for the AQ Pup fieldU-BThe (U-B) photographic color index (1)magphot.color;em.opt.U;em.opt.BfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmagPhotographic V magnitude (1)magphot.mag;em.opt.VfloatB-VThe (B-V) photographic color index (1)magphot.color;em.opt.B;em.opt.VfloatCompD=double, FC=faint companion, TC=two companionsmeta.code.multipcharJ/AJ/144/187/table3Times of maximum light for AQ PuprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDmaxHeliocentric Julian Date of light maximum (1)dtime.epochdoublee_HJDmax1{sigma} error in HJDmaxdstat.errorfloatMethDetection method (PG=photographic, B=photoelectric B, V=photoelectric V)meta.code;obscharEEpoch (number of elapsed cycles)meta.number;time.periodintO-CThe O-C valuedstat.fit.residualfloatNNumber of observations used to establish the observed light maximameta.numberintRefReference of observation; in refs.dat filemeta.refcharJ/AJ/144/187/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference identifierpos.frame;meta.maincharprimaryBibCodeBibliographic codemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar