J/MNRAS/443/1629ivo://CDS.VizieR/J/MNRAS/443/1629doi:10.26093/cds/vizier.74431629CDSShulyak D.Paladini C.Li Causi G.Perraut K.Kochukhov O.2024-08-10T20:18:06Z2015-07-21T07:01:54ZCDS support team

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

cds-question@unistra.frpeculiar-variable-starsinterferometryBy means of numerical experiments we explore the application of interferometry to the detection and characterization of abundance spots in chemically peculiar (CP) stars using the brightest star {epsilon} UMa as a case study. We find that the best spectral regions to search for spots and stellar rotation signatures are in the visual domain. The spots can clearly be detected already at a first visibility lobe and their signatures can be uniquely disentangled from that of rotation. The spots and rotation signatures can also be detected in near-infrared at low spectral resolution but baselines longer than 180m are needed for all potential CP candidates. According to our simulations, an instrument like VEGA (or its successor e.g. Fibered and spectrally Resolved Interferometric Equipment New Design) should be able to detect, in the visual, the effect of spots and spots+rotation, provided that the instrument is able to measure V_2_~10^-3^, and/or closure phase. In infrared, an instrument like AMBER but with longer baselines than the ones available so far would be able to measure rotation and spots. Our study provides necessary details about strategies of spot detections and the requirements for modern and planned interferometric facilities essential for CP star research.2014MNRAS.443.1629Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/443/1629CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/450/763 : Evolutionary state of magnetic CP stars (Kochukhov+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/443/1629https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/443/1629http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/443/1629https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/443/1629https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/443/1629http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/443/1629GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/443/1629/table2 (Observability of CP stars with modern and future interferometers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/443/1629/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/443/1629/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/443/1629/table2?GETtext/xml+votable180.050000true3.732912822.28422580.0055555555555555566/263 351 463 481 666 842 962 1125 1164 1287 1293 1313 1608 1768 2411 2490 2682 2746 2818 2903 3100 3188 3314 3678 3694 3705 4251 5501 5805 6497 6822 7527 7705 7734 8094 8389 8462 9048 10000 10151 10287 10783 10791 11094 11202 11279 11344 11786 12396 12770 14202 14272 14513 14567 14718 14766 14952 15223 15408 15424 15523 16074 16104 16186 16197 16982 17888 18273 18510 18797 19898 20322 20340 20363 20797 21099 21196 21264 22020 22115 22769 22822 22861 22867 23076 23200 23782 24562 24621 24925 25964 26057 26092 26353 26381 26691 26855 26886 27541 28137 28142 29161 29164 29555 30083 30438 30919 31511 31710 31716 31744 31940 32019 32198 32297 32974 32983 34875 35226 35676 35756 36119 36290 36298 36341 36563 37230 37323 37367 37370 37721 37814 37936 38078 38174 38287 38306 38441 38980 39008 39020 39202 39263 39290 39352 39515 39869 40783 40882 41088 41144 41154 41168 41181 41210 41497 41516 41524 41552 41562 41565 41568 41666 41731-41732 42035 42416 42463 42619 42670 42757 42944 43127 43157 43332 43420 43460 43531 43798 44136 44307 44310 44354 44371 44378 44468 44651 44825 44844 45097 45539 45573 46091 46470 46768 46856 47349 47539 47807 47824 48146 488967.952274030004205e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/443/1629?format=asciiOpticaldefaultJ/MNRAS/443/1629/table2Observability of CP stars with modern and future interferometersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPec[MH] M for magnetic CP or H for HgMn starmeta.notecharHDHD numbermeta.id;meta.mainintVmag[1.7/9.4] V magnitudemagphot.mag;em.opt.VfloatJmag? J magnitudemagphot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.HfloatnullableKmag? K magnitudemagphot.mag;em.IR.KfloatnullableDist[16/493]? Distancepcpos.distance;pos.heliocentricfloatnullableRad[0.6/9.6] Star radiussolRadphys.size.radiusfloatDiam? Angular diametermagphys.size.diameterfloatnullableBmax1[0/2560] Value of maximum baseline length needed to fully resolve the star at 0.55umminstr.baselineintBmax2[0/5818] Value of maximum baseline length needed to fully resolve the star at 1.25umminstr.baselineintBmax3[0/7680] Value of maximum baseline length needed to fully resolve the star at 1.65umminstr.baselineintBmax4[0/10007] Value of maximum baseline length needed to fully resolve the star at 2.15umminstr.baselineintRef[1/10] Reference (1)meta.ref;pos.frameintSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main