J/MNRAS/432/3186ivo://CDS.VizieR/J/MNRAS/432/3186doi:10.26093/cds/vizier.74323186CDSMiszalski B.Mikolajewska J.Udalski A.2024-07-22T20:13:03Z2018-12-12T13:05:45ZCDS support team

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

cds-question@unistra.frvariable-starsinfrared-photometrySymbiotic stars are interacting binaries with the longest orbital periods, and their multicomponent structure makes them rich astrophysical laboratories. The accretion of a high-mass-loss-rate red giant wind on to a white dwarf (WD) makes them promising Type Ia supernova (SN Ia) progenitors. Systematic surveys for new Galactic symbiotic stars are critical to identify new promising SN Ia progenitors (e.g. RS Oph) and to better estimate the total population size to compare against SN Ia rates. Central to the latter objective is building a complete census of symbiotic stars towards the Galactic bulge. Here we report on the results of a systematic survey of H{alpha} emission-line stars covering 35 deg^2^. It is distinguished by the combination of deep optical spectroscopy and long-term light curves that improve the certainty of our classifications. A total of 20 bona fide symbiotic stars are found (13 S-types, 6 D-types and 1 D'-type), 35 per cent of which show the symbiotic specific Raman-scattered Ovi emission bands, as well as 15 possible symbiotic stars that require further study (six S-types and nine D-types). Light curves show a diverse range of variability including stellar pulsations (semi-regular and Mira), orbital variations and slow changes due to dust. Orbital periods are determined for five S-types and Mira pulsation periods for three D-types. The most significant D-type found is H1-45 and its carbon Mira with a pulsation period of 408.6d, corresponding to an estimated period-luminosity relation distance of ~6.2+/-1.4kpc and M_K_=-8.06+/-0.12mag. If H1-45 belongs to the Galactic bulge, then it would be the first bona fide luminous carbon star to be identified in the Galactic bulge population. The lack of luminous carbon stars in the bulge is a longstanding unsolved problem. A possible explanation for H1-45 may be that the carbon enhancement was accreted from the progenitor of the WD companion. A wide variety of unusual emission-line stars were also identified. These include central stars of planetary nebulae (PNe) [one (WC10-11) Wolf-Rayet and five with high-density cores], two novae, two WN6 Wolf-Rayet stars, two possible Be stars, a B[e] star with a bipolar outflow, an ultracompact HII region and a dMe flare star. Dust obscuration events were found in two central stars of PNe, increasing the known cases to five, as well as one WN6 star. There is considerable scope to uncover several more symbiotic stars towards the bulge, many of which are currently misclassified as PNe, provided that deep spectroscopy is combined with optical and near-infrared light curves.2013MNRAS.432.3186Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/432/3186CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/93/383 : UBVRIJHKL photometry of symbiotic stars (Munari+ 1992)J/A+A/333/658 : D-type symbiotic stars emission line fluxes (Pereira+ 1998)J/A+A/343/841 : Imaging of symbiotic stars (Corradi+ 1999)J/A+AS/146/407 : Symbiotic stars catalogue (Belczynski+, 2000)J/A+A/370/503 : BV(RI)c photometry of 7 symbiotic stars (Munari+, 2001)J/A+A/372/145 : Symbiotic stars UBV(RI)c photometry. II. (Henden+, 2001)J/A+A/383/188 : Spectrophotometric atlas of symbiotic stars (Munari+, 2002)J/A+A/386/237 : UBV(RI)c photometry of 7 symbiotic stars (Munari+, 2002)J/A+A/435/1087 : Nebular abundances of southern symbiotic stars (Luna+, 2005)J/A+A/458/339 : Symbiotic stars UBV(RI)c photometry. III. (Henden+, 2006)J/A+A/480/409 : IPHAS symbiotic stars candidates (Corradi+, 2008)J/BaltA/17/293 : Symbiotic stars multi-epoch UBV(RI)c photometry (Henden+ 2008)J/PASP/122/35 : Symbiotic stars on Asiago archive plates (Jurdana-Sepic+ 2010)J/AN/333/242 : Recent photometry of symbiotic stars (Skopal+, 2012)J/A+A/567/A49 : Spectra of IPHAS symbiotic stars (Rodriguez-Flores+, 2014)J/AJ/153/35 : Infrared spectroscopy of symbiotic stars. XI. (Fekel+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/432/3186https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/432/3186http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/432/3186https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/432/3186https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/432/3186http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/432/3186GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/432/3186/tablea1 (2MASS and GLIMPSE magnitudes of new and possible symbiotic stars.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/432/3186/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/432/3186/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/432/3186/tablea1?GETtext/xml+votable180.050000true268.13-29.2594440.005555555555555556Cone search capability for table J/MNRAS/432/3186/tablea2 (2MASS and GLIMPSE magnitudes of other objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/432/3186/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/432/3186/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/432/3186/tablea2?GETtext/xml+votable180.050000true270.484167-27.3819440.0055555555555555565/7217 6/28710 28715-28718 28721 28727 28735 28778-28779 28795 28821-28823 28828 28834 28836-28838 28841 28843 28845 28847 28849-28850 28853 28856 28859 28861 28864 28866-28867 28872-28873 28876 42095 42493 472442.483060040379131e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/432/3186?format=asciiInfrareddefaultJ/MNRAS/432/3186/tablea12MASS and GLIMPSE magnitudes of new and possible symbiotic stars.SimbadNameSimbad column added by the CDSmeta.idcharNameNamemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTypeSpectral type (1)src.spTypecharJmag? 2MASS J magnitudemagphot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.KfloatnullableJ-H? 2MASS J-H colour indexmagphot.color;em.IR.J;em.IR.HfloatnullableH-Ks? 2MASS H-Ks colour indexmagphot.color;em.IR.H;em.IR.KfloatnullableJ-Ks? 2MASS J-Ks colour indexmagphot.color;em.IR.J;em.IR.KfloatnullableQflag2MASS photometric flagsmeta.code.qualchar[3.6]? GLIMPSE 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullable[4.5]? GLIMPSE 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullable[5.8]? GLIMPSE 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullable[8.0]? GLIMPSE 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullableJ/MNRAS/432/3186/tablea22MASS and GLIMPSE magnitudes of other objectsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTypeSpectral type (1)src.spTypecharJmag? 2MASS J magnitudemagphot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.KfloatnullableJ-H? 2MASS J-H colour indexmagphot.color;em.IR.J;em.IR.HfloatnullableH-Ks? 2MASS H-Ks colour indexmagphot.color;em.IR.H;em.IR.KfloatnullableJ-Ks? 2MASS J-Ks colour indexmagphot.color;em.IR.J;em.IR.KfloatnullableQflag2MASS photometric flagsmeta.code.qualchar[3.6]? GLIMPSE 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullable[4.5]? GLIMPSE 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullable[5.8]? GLIMPSE 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullable[8.0]? GLIMPSE 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullable