J/ApJ/841/33ivo://CDS.VizieR/J/ApJ/841/33doi:10.26093/cds/vizier.18410033CDSMontez R.Ramstedt S.Kastner J.H.Vlemmings W.Sanchez E.2018-05-16T06:55:24Z2018-02-13T08:03:49ZCDS support team

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

cds-question@unistra.frgiant-starscarbon-starsultraviolet-photometryinfrared-photometryvisible-astronomyphotometryWe have performed a comprehensive study of the UV emission detected from asymptotic giant branch (AGB) stars by the Galaxy Evolution Explorer (GALEX). Of the 468 AGB stars in our sample, 316 were observed by GALEX. In the near-UV (NUV) bandpass ({lambda}_eff_~2310{AA}), 179 AGB stars were detected and 137 were not detected. Only 38 AGB stars were detected in the far-UV (FUV) bandpass ({lambda}_eff_~1528{AA}). We find that NUV emission is correlated with optical to near-infrared emission, leading to higher detection fractions among the brightest, and hence closest, AGB stars. Comparing the AGB time-variable visible phased light curves to corresponding GALEX NUV phased light curves, we find evidence that for some AGB stars the NUV emission varies in phase with the visible light curves. We also find evidence that the NUV emission and possibly the FUV emission are anticorrelated with the circumstellar envelope density. These results suggest that the origin of the GALEX-detected UV emission is an inherent characteristic of the AGB stars that can most likely be traced to a combination of photospheric and chromospheric emission. In most cases, UV detections of AGB stars are not likely to be indicative of the presence of binary companions.2017ApJ...841...33Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/841/33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)II/312 : GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011)J/A+A/324/1059 : C-rich stars IR and UBVRI photometry (Le Bertre 1997)J/A+A/382/184 : Crystalline silicates around evolved stars (Molster+, 2002)J/MNRAS/369/751 : Near-infrared photometry of carbon stars (Whitelock+, 2006)J/A+A/498/627 : Radial velocities of SB with M giant (Famaey+, 2009)J/MNRAS/411/2770 : Hot white dwarfs in GALEX-DR5 (Bianchi+, 2011)J/MNRAS/414/418 : Chromospheric Mg II h+k flux of evolved stars (Perez+, 2011)J/ApJ/728/149 : Polarized SiO masers of VX Sgr (Vlemmings+, 2011)J/AJ/143/28 : Analysis of B6-A9 stars from INES UV spectra (Freire+, 2012)J/ApJS/227/6 : LCs re-analysis of Mira variables in ASAS (Vogt+, 2016)http://galex.stsci.edu/ : GALEX Public Archive on MASThttp://www.galex.caltech.edu/ : GALEX home pagehttp://www.aavso.org/ : AAVSO International Databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/841/33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/841/33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/841/33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/841/33https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/841/33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/841/33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/841/33/table1 (Catalog of AGB stars associated with GALEX sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/841/33/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/841/33/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/841/33/table1?GETtext/xml+votable180.050000true345.2212146.510420.005555555555555556Cone search capability for table J/ApJ/841/33/table2 (Limiting magnitudes for undetected AGB stars with GALEX observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/841/33/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/841/33/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/841/33/table2?GETtext/xml+votable180.050000true16.6082712.598070.0055555555555555566/220 676 958 1102 1345 1350 1493 1519 1727 1857 1889 1892 1977 1986 2094 2428 2449 2500 2687 2694 2732 2740 2920 2990 2994 3012 3050 3061 3152 3209 3432 3459 3628 3716 3801 3951 3996 4041 4306 4347 4355 4365 4614 4892 5273 5489 5647 6161 6314 6347 6399 6714 6919 7531 7619 7631 7673 7840 7881 7919 8405 8475 8492 8603 8926 9137 9142 9258 9783 9813 9939 9968 10103 10107 10167 10635 10960 11017 11214 11597 11712 11866 11928 12137 12382 12470 12556 12833 12882 12889 13089 13114 13160 13198 13207 13237 13338 13463 13500 13623 13666 13683 13758 13783 13813 13845 13861 13968 14048 14076 14175 14308 14434 14437 14490 14595 14605 14660 14834 15044 15140 15168 15401 15566 15625 15757 16088 16157 16175 16224 16232 16233 16267 16335 16459 16594 16783 17271 17314 17716 17763 18188 18323 18364 18457 18998 19112 19293 19490 19830 19950 20110 20272 20477 20715 21050 21376 21494 21710 21744 21977 22156 22161 22204 22802 23846 24151 24415 24461 25228 25246 25543 25798 26070 26180 26289 26327 26345 26360 26654 28072 28113 28868 28981 28996 29000 29009 29017 29043 29045 29286 29290 29678 29701 29703 29812 29877 29963 29974 30087 30123 30181 30801 30856 31194 31458 31610 31817 31922 31938 32074 32322 32500 32784 32799 32878 33056 33221 33233 33525 33589 33664 33739 33919 34077 34356 34576 34792 35641 36222 36311 36320 36369 37018 37023 37350 37395 37400 37952 38038 38078 38230 38660 38679 38701 38862 39523 39631 39803 39899 39933 40244 40422 40676 40686 41001 41118 41224 41432 41672 41710 41724 41791 41900 42125 42310 42318 42437 42467 42566 42592 42721 42814 42833 42840 42850 42882 43494 43566 43609 43864 43890 44018 44081 44320 44417 44515 44546 45088 45279 45571 45973 46313 46642 46729 46932 47098 47248 47277 47303 47376 47387 47414 47469 47513 47558 47907 47963 47978 48006 48301 48650 48700 48715 49129 491327.447298006782415e-19 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/841/33?format=asciiUVInfraredOpticaldefaultJ/ApJ/841/33/table1Catalog of AGB stars associated with GALEX sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject identifiermeta.id;meta.maincharprimarySpmeta.ref.urlintnullableRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainTypeChemical typesrc.classcharVmag[3.9/13.1]? Apparent V band magnitudemagphot.mag;em.opt.VfloatnullableJmag[-2.7/5.1]? Apparent J band magnitudemagphot.mag;em.IR.JfloatnullableE(B-V)[0.01/3.5] Extinction estimatemagphot.color.excessfloatSurveyGALEX survey mode (1)instr.setupcharDateUT date of the observationtime.epoch;obsnullableNexp[37/27576]? NUV exposure timestime.duration;obs.exposure;em.UV.200-300nmintnullableNUVmag[12.9/24]? GALEX NUV band apparent AB magnitudemagphot.mag;em.UVfloatnullablee_NUVmag[0/0.7]? Uncertainty in NUVmagmagstat.error;phot.mag;em.UV.200-300nmfloatnullableFexp[28/11032]? FUV exposure timestime.duration;obs.exposure;em.UV.100-200nmintnullablel_FUVmagLimit flag on FUVmagmeta.code.errorcharFUVmag[15.2/24]? GALEX FUV band apparent AB magnitudemagphot.mag;em.UVfloatnullablee_FUVmag[0/3]? Uncertainty in FUVmagmagstat.error;phot.mag;em.UV.100-200nmfloatnullableOffSet[0.1/2.5]? Offset between GALEX and AGB star positionsarcsecpos.angDistancefloatnullableGR5Display the GALEX-GR5 (II/312) data within 2.5"meta.ref.urlintnullableGCVSDisplay the GCVS data within 2"meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/841/33/table2Limiting magnitudes for undetected AGB stars with GALEX observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject identifiermeta.id;meta.maincharprimarySpmeta.ref.urlintnullableRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainTypeChemical typesrc.classcharVmag[5.2/20]? Apparent V band magnitudemagphot.mag;em.opt.VfloatnullableJmag[1/8.2]? Apparent J band magnitudemagphot.mag;em.IR.JfloatnullableE(B-V)[0.01/3] Extinction estimatemagphot.color.excessfloatNexp[44/22828] NUV exposure timestime.duration;obs.exposure;em.UV.200-300nmintl_NUVmagLimit flag on NUVmagmeta.code.errorcharNUVmag[20.4/23.2] GALEX NUV band apparent AB magnitudemagphot.mag;em.UVfloatFexp[43/29876]? FUV exposure timestime.duration;obs.exposure;em.UV.100-200nmintnullablel_FUVmagLimit flag on FUVmagmeta.code.errorcharFUVmag[20/23.2]? GALEX FUV band apparent AB magnitudemagphot.mag;em.UVfloatnullableGR5Display the GALEX-GR5 (II/312) data within 2.5"meta.ref.urlintnullableGCVSDisplay the GCVS data within 2"meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/841/33/table4AGB stars with GALEX grism spectroscopyONameOther namemeta.idcharDetDetectedmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject identifiermeta.id;meta.maincharDateUT date of observationtime.epoch;obsnullabletNUV[1088/11325] NUV exposure timestime.duration;obs.exposure;em.UV.200-300nminttFUV[1007/11325] FUV exposure timestime.duration;obs.exposure;em.UV.100-200nmintSimbadSimbad column added by the CDSmeta.ref.urlchar