Infrared photometry of Be stars J/MNRAS/463/1162 ivo://CDS.VizieR/J/MNRAS/463/1162 doi:10.26093/cds/vizier.74631162 CDS Chen P.S. Liu J.Y. Shan H.G. 2024-08-16T20:18:55Z 2018-07-03T12:09:43Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr be-stars infrared-photometry In this paper, we have collected data for almost all Be stars known so far (1991 sources in total) and photometrically study their infrared properties. 2MASS, WISE, IRAS and Akari data are analysed. It is shown from several two-colour diagrams that from 1 to 60um, infrared excesses for the majority of Be stars are mainly due to the free-free emission or the bound-free emission from proton-electron scattering, while for only a small number of Be stars their infrared excess originates from dust thermal radiation or is caused by the nebulosity/binarity effects. However, in the wavelength range 3.4-12um (the WISE W1, W2 and W3 bands), some Be stars show the properties of dust thermal radiation, which is probably due to silicate dust emission and/or polycyclic aromatic hydrocarbon emission. In addition, it is found in this paper that infrared colour excesses indeed increase with wavelength for Be stars. However, no correlations between infrared colours and spectral type can be found for Be stars. Furthermore, several stars have very large infrared excesses in the near-infrared. The reasons for such infrared excesses are given in more detail. 2016MNRAS.463.1162C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/463/1162 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/other/NewA/9.509 : IRAS observations of Be stars (Zhang+, 2004) J/other/NewA/10.325 : 2MASS observations of Be stars (Zhang+, 2005) J/AJ/149/7 : SDSS-III/APOGEE. I. Be stars (Chojnowski+, 2015) J/MNRAS/446/274 : A deep catalogue of classical Be stars (Raddi+, 2015) J/other/NewA/44.1 : IR photometric study og Herbig Ae/Be stars (Chen+, 2016) http://basebe.obspm.fr : BeSS database Home Page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/463/1162 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/463/1162 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/463/1162 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/463/1162 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/463/1162 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/463/1162 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/463/1162/table1 (Infrared properties of Be stars in this paper) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/463/1162/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/463/1162/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/463/1162/table1? 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1.1166583743361574e-19 1.7003137259100215e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/463/1162?format=ascii Infrared default J/MNRAS/463/1162/table1 Infrared properties of Be stars in this paper SimbadName Simbad column added by the CDS meta.id char l_Hmag Upper limit flag on Hmag meta.code.error char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Seq [1/1991] Sequential number meta.record int Name Name meta.id;meta.main char n_RAJ2000 [*] Note on position (1) meta.note char RAJ2000 Right ascension (J2000) pos.eq.ra;meta.main DEJ2000 Declination (J2000) pos.eq.dec;meta.main n_SpType [*] Note on SpType (2) meta.note char SpType Spectral type src.spType char l_W1mag Upper limti flag on W1mag meta.code.error char W1mag ? W1 magnitude mag phot.mag;em.IR.3-4um float nullable e_W1mag ? rms uncertainty on W1mag mag stat.error;phot.mag float nullable l_W2mag Upper limit flag on W2mag meta.code.error char W2mag ? W2 magnitude mag phot.mag;em.IR.4-8um float nullable e_W2mag ? rms uncertainty on W2mag mag stat.error;phot.mag float nullable l_W3mag Upper limit flag on W3mag meta.code.error char W3mag ? W3 magnitude mag phot.flux.density;em.IR.8-15um float nullable e_W3mag ? rms uncertainty on W3mag mag stat.error;phot.mag float nullable l_W4mag Upper limit flag on W4mag meta.code.error char W4mag ? W4 magnitude mag phot.flux.density;em.IR.15-30um float nullable e_W4mag ? rms uncertainty on W4mag mag stat.error;phot.mag float nullable l_Jmag Upper limit flag on Jmag meta.code.error char Jmag 2MASS J magnitude mag phot.mag;em.IR.J float e_Jmag ? rms uncertainty on Jmag mag stat.error;phot.mag;em.IR.J float nullable Hmag 2MASS H magnitude mag phot.mag;em.IR.H float e_Hmag ? rms uncertainty on Hmag mag stat.error;phot.mag;em.IR.H float nullable l_Kmag Upper limit flag on Kmag meta.code.error char Kmag ? 2MASS K magnitude mag phot.mag;em.IR.K float nullable e_Kmag ? rms uncertainty on Kmag mag stat.error;phot.mag;em.IR.K float nullable AV ? Galactic extinction coefficient mag phys.absorption float nullable r_AV [ab] Reference on AV (3) meta.ref;pos.frame char IRAS IRAS name meta.id char Notes Notes meta.note char