J/AJ/153/252ivo://CDS.VizieR/J/AJ/153/252doi:10.26093/cds/vizier.51530252CDSLabadie-Bartz J.Pepper J.McSwain M.V.Bjorkman J.E.Bjorkman K.S.,Lund M.B.Rodriguez J.E.Stassun K.G.Stevens D.J.James D.J.,Kuhn R.B.Siverd R.J.Beatty T.G.2018-05-30T13:20:27Z2018-05-03T06:22:54ZCDS support team

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

cds-question@unistra.frbe-starsvariable-starsinfrared-photometryvisible-astronomyphotometrystellar-spectral-typesBe stars have generally been characterized by the emission lines in their spectra, and especially the time variability of those spectroscopic features. They are known to also exhibit photometric variability at multiple timescales, but have not been broadly compared and analyzed by that behavior. We have taken advantage of the advent of wide-field, long-baseline, and high-cadence photometric surveys that search for transiting exoplanets to perform a comprehensive analysis of brightness variations among a large number of known Be stars. The photometric data comes from the KELT transit survey, with a typical cadence of 30 minutes, a baseline of up to 10 years, photometric precision of about 1%, and coverage of about 60% of the sky. We analyze KELT light curves of 610 known Be stars in both the northern and southern hemispheres in an effort to study their variability. Consistent with other studies of Be star variability, we find most of the stars to be photometrically variable. We derive lower limits on the fraction of stars in our sample that exhibit features consistent with non-radial pulsations (25%), outbursts (36%), and long-term trends in the circumstellar disk (37%), and show how these are correlated with spectral sub-types. Other types of variability, such as those owing to binarity, are also explored. Simultaneous spectroscopy for some of these systems from the Be Star Spectra database allow us to better understand the physical causes for the observed variability, especially in cases of outbursts and changes in the disk.2017AJ....153..252Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/153/252CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/67 : Catalogue of Be stars (Jaschek+, 1982)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/335/565 : Be stars variability (Hubert+ 1998)J/AJ/149/7 : SDSS-III/APOGEE. I. Be stars (Chojnowski+, 2015)http://basebe.obspm.fr : The BeSS databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/153/252https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/153/252http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/153/252https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/153/252https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/153/252http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/153/252GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/153/252/table2 (Table of BeSS-KELT stars with variable type classifications)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/153/252/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/153/252/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/153/252/table2?GETtext/xml+votable180.050000true11.643534.82880.0055555555555555565/811 3657 6/989 1011 1163 1293 1299 1301 1305 1307 1310 1319 1328 1342 1348 1392 1427 1428 1429 1441 1445 1455 1627 1628 1689 1724 1725 1733 1741 1768 1771 1783 1784 1787 1796 1960 2526 2550 2554 2575 2833 2851 2903 2934 2937 2940 2941 2942 2990 2996 3004 3033 3036 3038 3050 3057 3058 3060 3063 3064 3066 3100 3163 3198 3243 3251 3253 3254 3255 3256 3257 3258 3261 3262 3270 3272 3277 3283 3286 3290 3298 3301 3306 3307 3308 3316 3461 3464 3588 3589 3596 3597 3602 3604 3608 3609 3610 3614 3615 3618 3619 3620 3622 3623 3625 3630 3631 3632 3634 3635 3638 3641 3658 3659 3660 3662 3680 3712 3718 3722 3723 3737 3751 3752 3763 9475 12827 12849 12981 12988 13000 13039 13142 13185 13234 13288 13310 13559 13687 13701 13746 13934 13967 13982 14003 14004 14146 14152 14172 14188 14191 14198 14207 14227 14230 14236 14257 14261 14262 14263 14265 14267 14279 14283 14285 14299 14302 14317 14321 14322 14336 14347 14352 14353 14356 14412 14415 14418 14425 14453 14457 14493 14555 14560 14579 14598 14601 14621 14636 14637 14640 14641 14643 14644 14645 14646 14653 14654 14658 14676 14691 14698 14700 14849 14881 15646 15668 15681 15683 15684 15686 15701 20419 21338 21343 21439 21655 21657 21658 21661 21682 21691 21718 21748 21815 21893 21943 21951 22023 22032 22040 22044 22046 22053 22059 22074 22080 22087 22088 22089 22093 22112 22121 22122 22135 22197 22209 22235 22236 22239 22243 22246 22249 22252 22254 22435 22503 22514 22860 22863 22871 22876 22896 22906 23000 23571 23572 23581 23627 23629 23631 23632 23646 23649 23658 23672 23716 23763 23807 23829 23851 23936 23976 23980 23986 23992 23998 24179 24180 24183 24188 24230 24265 24291 24326 24333 24339 24344 24359 24363 24365 24367 24368 24376 24381 24382 24384 24442 24451 24452 24453 24457 24461 24462 24467 24469 24474 24483 24508 29593 29879 29882 29883 30022 30062 30094 30123 30211 30212 30215 30217 30227 30242 30244 30271 30278 30288 30294 30327 30406 30415 30441 30444 30474 30476 30477 30508 30538 30540 30576 30596 30607 30609 30617 30632 30642 31058 31748 31760 31787 31808 31815 31954 32049 32126 32170 32546 32550 32576 32604 33563 33826 34199 34878 37301 37345 37351 37357 37359 37493 37496 37592 37616 37637 37641 37660 37680 37681 37682 37699 37700 37704 37708 37714 37715 37723 37724 37731 37732 37742 37752 37753 37782 37795 37819 37822 37833 37856 37862 37865 37867 37868 37869 37872 37876 37880 37882 37886 37887 38236 38538 38539 38565 38655 38831 38967 38993 39133 39175 39191 39193 39199 39206 39216 39217 39220 39236 39242 39243 39254 39257 39260 39268 39300 39316 39332 39339 39346 39415 39509 39517 39558 40046 40049 40085 40161 40221 40285 40451 40455 40671 40865 43357 43443 43637 44616 47288 477048.157980699529898e-21 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/153/252?format=asciiOpticalInfrareddefaultJ/AJ/153/252/table2Table of BeSS-KELT stars with variable type classificationsSimbadNameSimbad column added by the CDSmeta.idcharIDCommon identifier (1)meta.id;meta.maincharKwIDKELT western orientation data file identifiermeta.id;meta.filecharW3mag[-0.653/11.207]? WISE 12{mu}m band magnitude (3)magphot.flux.density;em.IR.8-15umfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBKNum[0/609] Internal identifiermeta.idintRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainVmag[6.03/12.81] V band magnitude (1)magphot.mag;em.opt.VfloatSpTypeSpectral type (1)src.spTypecharNSpec[0/3317] Number of archival BeSS spectrameta.numberintvsini[5/500]? BeSS rotational velocitykm/sphys.veloc.rotatintnullableKeIDKELT eastern orientation data file identifiermeta.id;meta.filecharKemag[8.69/18.16]? KELT eastern orientation instrumental magnitudemagphot.magfloatnullableKwmag[8.29/16.14]? KELT western orientation instrumental magnitudemagphot.magfloatnullableGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdoubleJmag[4.303/11.927] 2MASS J band magnitude (2)magphot.mag;em.IR.JfloatHmag[3.546/11.822] 2MASS H band magnitude (2)magphot.mag;em.IR.HfloatKsmag[3.326/11.686]? 2MASS K_s_ band magnitude (2)magphot.mag;em.IR.KfloatnullableW1mag[3.138/11.525]? WISE 3.4{mu}m band magnitude (3)magphot.mag;em.IR.3-4umfloatnullableW2mag[1.585/11.32]? WISE 4.6{mu}m band magnitude (3)magphot.mag;em.IR.4-8umfloatnullableW4mag[-2.078/9.408]? WISE 22{mu}m band magnitude (3)magphot.flux.density;em.IR.15-30umfloatnullableNUVmag[10.55/19.1]? GALEX NUV band magnitude (4)magphot.mag;em.UVfloatnullableFUVmag[11.80/17.81]? GALEX FUV band magnitude (4)magphot.mag;em.UVfloatnullablePer1[0.14205/205.99]? First perioddtime.perioddoublenullablePer2[0.20635/192.70125]? Second perioddtime.perioddoublenullablePer3[6.57901/127.10082]? Third perioddtime.perioddoublenullableVTypeVariable type(s) (5)meta.code;src.varchar