J/A+AS/128/265ivo://CDS.VizieR/J/A+AS/128/265CDSMasana E.Jordi C.Maitzen H.M.Torra J.2017-11-29T11:48:29Z2007-04-11T11:59:17ZCDS support team

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

cds-question@unistra.frpeculiar-variable-starsearly-type-starsvisible-astronomymedium-band-photometryThe aim of this work is to study the capacity of the uvby H_{beta}_ system for detecting the chemically peculiar (CP) stars based on the effect that peculiar features in the flux distribution have on all the Stroemgren-Crawford indices. Our study focuses on the classical magnetic peculiar stars (CP2), though Am star s (CP1) are also included for comparison with cool CP2 stars. Satisfactory results were obtained for hot CP2 stars: the definition of a new index p, which is a linear combination of uvby H_{beta}_ colours, allowed us to separate a high percentage of hot CP2 stars from normal stars. According to this new index, 60 new CP2 candidates are proposed. The working sample was extracted from The General Catalogue of Ap and Am stars by Renson et al. (1991, Cat. <III/162>). Photometric observations to enlarge the sample of CP2 stars with complete uvby H_{beta}_ photometry were carried out. These observations are also reported in the present paper. The new index p is also used to correct the reddening of early CP2 stars computed as if they were normal stars.1998A&AS..128..265Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/128/265CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/162 : General Catalogue of Ap and Am stars (Renson+ 1991)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/128/265https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/128/265http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/128/265https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/128/265https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/128/265http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/128/265GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/128/265/table2 (uvby-beta photometry for CP2 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/128/265/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/128/265/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/128/265/table2?GETtext/xml+votable180.050000true8.037278143.71162560.005555555555555556Cone search capability for table J/A+AS/128/265/table3 (H{beta} photometry for CP2 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/128/265/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/128/265/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/128/265/table3?GETtext/xml+votable180.050000true66.4436792-44.85430280.005555555555555556Cone search capability for table J/A+AS/128/265/table7 (Early CP2 candidate stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/128/265/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/128/265/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/128/265/table7?GETtext/xml+votable180.050000true105.9767167-11.47483330.0055555555555555566/903 1287 1562 1573 1769 2411 2481 2717 2737 4822 6760 8389 9461 12837 12936 13687 13706 13899 14034 14202 14206 14210 14279 14317 14322 14361 14486 14534 14576 14828 15428 15537 17859 19611 20544 20671 20705 20763 20766 20791 20830 20839 20846 20944 20987 21133 21222 21253 21264 21269 21289 21298 21332 21488 21521 21594 21643 21659 21684 21721 21807 22083 22087 22094 22096 22130 22179 22183 22192-22193 22249 22258 22311 22443 22448 22578 22622 22641 22644 22657 22808 22857 22867 22957 23010 23076 23391 23410 23556 23622 23634 23641 23744 24077 24469 24674 24744 24934 25122 25297 25891 26020 26284 26669 26977 27120 27210 27872 28806 28913 29081 29555 29829 30202 30306 30341 30668 31043 31258 31330 31814 31839 31909 32647 33089 33997 34005 34042 34095 34130 36295 36729 36919 36937 36966 37081 37151 37185 37289 37291 37442-37443 37464 37467 37585 37592 37665 37681 37721 37759 37774 37808 37891 37897 37901 37912 37936 38015 38017-38018 38043 38051-38052 38054 38078 38081 38123 38142-38143 38161 38289 38297 38417 38441 38494 38503 38540 38861 38980 38990 39020 39198 39226 39263 39269 39344 39365 39407 39462 39532 39591 39613 39639 39772 39789 39801-39802 39824 39836 39930 39945 39963 40079 40184 40189 40356 40372 40379 40586 40599 40608 40676 40686 40871 40890 41088 41144 41154 41162 41168 41181 41202 41210 41287 41404 41419 41533 41539 41552 41562 41568 41665 41701 41710 41735 41786 41798 41829 41994 42098 42155 42274 42295 42349 42357 42394 42555 42619 42757 42879 42943-42944 42975 43017 43025 43099 43157 43445 43798 44110 47927https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/128/265?format=asciiOpticaldefaultJ/A+AS/128/265/table2uvby-beta photometry for CP2 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDIdentification (HD number, Cat. <III/135>)meta.id;meta.mainintm_HDMultiplicity index on HDmeta.code.multipcharHIC? Identification (HIC number, Cat. <I/196>)meta.idintnullablem_HICMultiplicity index on HICmeta.code.multipcharSpTypeSpectral typesrc.spTypechar(b-y)(b-y) colour indexmagphot.color;em.opt.B;em.opt.Vfloate_(b-y)rms uncertainty (b-y)magstat.errorfloatVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloatm1m1 colour indexmagphot.colorfloate_m1rms uncertainty on m1magstat.errorfloatc1c1 colour indexmagphot.colorfloate_c1rms uncertainty on c1magstat.errorfloato_uvbyNumber of measurements in uvbymeta.numberintHbetaH{beta} colour indexmagphot.color;em.line.Hbeta;em.line.Hbetafloate_Hbetarms uncertainty Hbetamagstat.error;spect.line.intensity;em.line.Hbetafloato_HbetaNumber of measurements in H{beta}meta.numberintSimbadSimbad column added by the CDSchar_RAPosition J2000 (from SIMBAD) (right ascension part)degpos.eq.ra;meta.main_DEPosition J2000 (from SIMBAD) (declination part)degpos.eq.dec;meta.mainJ/A+AS/128/265/table3H{beta} photometry for CP2 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDIdentification (HD number, Cat. <III/135>)meta.id;meta.mainintm_HDMultiplicity index on HDmeta.code.multipcharHICIdentification (HIC number, Cat. <I/196>)meta.idintm_HICMultiplicity index on HICmeta.code.multipcharSpTypeSpectral typesrc.spTypecharHbetaH{beta} colour indexmagphot.color;em.line.Hbeta;em.line.Hbetafloate_Hbetarms uncertainty on Hbetamagstat.error;spect.line.intensity;em.line.Hbetafloato_HbetaNumber of measurements in H{beta}meta.numberintSimbadSimbad column added by the CDSchar_RAPosition J2000 (from SIMBAD) (right ascension part)degpos.eq.ra;meta.main_DEPosition J2000 (from SIMBAD) (declination part)degpos.eq.dec;meta.mainJ/A+AS/128/265/table7Early CP2 candidate starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIdentification (1)meta.id;meta.maincharOtherNameAlternative identification (1)meta.idcharSpTypeSpectral typesrc.spTypecharDELTApDelta p (peculiarity parameter)magphot.mag;arith.difffloatSimbadNameSimbad column added by the CDSmeta.idchar_RAPosition J2000 from Simbad, except for a few stars which could not be found (right ascension part)degpos.eq.ra;meta.mainnullable_DEPosition J2000 from Simbad, except for a few stars which could not be found (declination part)degpos.eq.dec;meta.mainnullable