J/A+A/706/A249ivo://CDS.VizieR/J/A+A/706/A249doi:10.26093/cds/vizier/bc-p2/lcejCDSGarcia-Moreno G.Blagorodnova N.Anders F.Weiler M.Wichern H.,Britavskiy N.de Wet S.2026-03-02T20:01:16Z2026-02-13T09:24:11ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyeclipsing-binary-starsphotometryvisible-astronomyMass transfer between stars in binary systems profoundly impacts their evolution, yet many aspects of this process (especially the stability, mass loss, and eventual fate of such systems) remain poorly understood. One promising avenue to constrain these processes is through the identification and characterisation of systems undergoing active mass transfer. Inspired by the slow brightening preceding stellar merger transients, we worked on a method to identify Galactic mass-transferring binaries in which the donor is a Hertzsprung gap star. We constructed an initial sample of Hertzsprung gap stars using the Gaia EDR3 contribution Starhorse catalogue, and we identified candidate mass-transferring systems by selecting sources that exhibit Balmer emission features (as seen in the low-resolution Gaia XP spectra), mid-infrared excess (from WISE photometry), and photometric variability (inferred from the error in the Gaia G-band magnitude). This multi-criteria selection yielded a sample of 67 candidates, which we further analysed using complementary photometric and spectroscopic data, as well as information from cross-matched archival catalogues. Among our candidates, we identified at least nine eclipsing binaries and some sources that are potential binaries as well. Three sources in our sample are strong candidates for mass-transferring binaries with a yellow component, and three more are binaries with a Be star. Notably, three sources in our sample are strong candidates for hosting a compact companion, based on their ultraviolet or X-ray signatures. The main sources of contamination in our search are hot but highly reddened stars (primarily Oe and Be stars) as well as regular pulsating stars such as delta Scuti and Cepheid variables. As an additional outcome of this work, we present a refined new catalogue of 308 Hertzsprung gap stars, selected using improved extinction corrections and stricter emission-line criteria. This enhanced sample is expected to contain a significantly higher fraction of scientifically valuable mass-transferring binaries.2026A&A...706A.249Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A249CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/354 : StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)V/160 : SHBoost 2024 (Khalatyan+, 2024)https://gea.esac.esa.int/archive/ : Gaia archivehttps://gaia.aip.de : Gaia@AIPhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/706/A249https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/706/A249http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/706/A249https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/706/A249https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/706/A249http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/706/A249GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/706/A249/hg_cat (Our new Hertzsprung gap sources, with information from the Gaia DR3 and from the SHBoost catalogues)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/706/A249/hg_cat?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/706/A249/hg_cat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/706/A249/hg_cat?GETtext/xml+votable180.050000true282.5376101249198-5.25117172945910.0055555555555555566/1095 1133 1293 1308 1327-1328 1452 1457 1459 1469 1775 1780 1783 1788-1789 1796 1817 1826 1828 1843 1957 1963 1965 3008 3038 3047 3061 3063-3064 3066-3067 3153 3157 3161 3165 3179 3181 3184 3186 3192-3193 3235 3249 3257 3273-3274 3290 3294 3305 3321 3330 3604 3615 3626 3632 3646 3667 3686 3690 3698 3717 3724 3731 3738 3745 3751 3776-3777 12971 13039 13112 13310-13311 14017 14140 14205 14249 14259 14288 14293 14304-14305 14308 14310 14314-14315 14320 14359 14402 14406 14411 14417 14428 14430-14431 14453 14456 14598 14603 14616-14617 14627 14644-14646 14675 14678 14680 14686 14692-14693 14695 14711-14712 14717 15382 15385 15389-15390 15392-15393 15398 15405 15427 15434 15443-15444 15447 15450 15453 15455 15459 15462-15463 15465 15476 15506 15618 15620 15637 15640 15644 15668 15670 15684-15685 15691-15692 20827 20917 21338 21350 21505 21637 21663 21665 21671 21680 21689 21720 21737 22032-22033 22044 22162 22196 22228 23344 23561 23647 23669-23670 23674 23731 23766 23805 23844 23945 23969 23977 23992 24285 24320 24325 24331 24336-24337 24376 24419 24474 27153 28734 28801 29033 29099 29102 29179 29229 29238 29509-29510 29514 29521 29556 29653 30232 30252 30258 30264 30326 30599 30630 30641 30654 30711 32207 37232 37332 37339 37341-37342 37365 37367-37368 37371 37713-37714 37721 37726 37735 37748 37751 37755 37822 37839 37842 37861 37869 37880 37898 37920 37926 38020 38024 38026 38041 38048 38411 39237 39240 39243-39244 39265 39269 39276-39278 39288 39703 39731 39735 39746 39753-39755 39768 39790 39876 39912 40611 40619 41471 41551 41631 41663 41692 41765 41779 41781 42174 42347 42390 42419 43025 43063 46079https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/706/A249?format=asciiOpticaldefaultJ/A+A/706/A249/hg_catOur new Hertzsprung gap sources, with information from the Gaia DR3 and from the SHBoost cataloguesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 unique source identifier (source_id)meta.id;meta.mainRA_ICRSRight ascension (ICRS) (ra) (1)degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) (dec) (1)degpos.eq.dec;meta.mainGmagG-band mean magnitude (phot_g_mean_mag) (1)magphot.mag;em.optdoubleBP-RPBP-RP colour (bp_rp) (1)magphot.color;em.opt.B;em.opt.RdoubleDistDistance estimate from the literature (dist) (2)kpcpos.distancedoubleb_Dist? 16th distance percentile from the literature (dist_lower) (2)kpcpos.distancedoublenullableB_Dist? 84th distance percentile from the literature (dist_upper) (2)kpcpos.distancedoublenullableAVmeanLine-of-sight extinction at lambda=5420{AA}, AV, xgboost-distribution mean value (xgbdist_av_mean) (2)magphys.absorptiondoubles_AVmeanLine-of-sight extinction at lambda=5420{AA}, AV, xgboost-distribution standard deviation (xgbdist_av_std) (2)magphys.absorptiondoublelogTeffmeanEffective temperature, xgboost-distribution mean value (xgbdist_logteff_mean) (2)log(K)phys.temperature.effective;stat.meandoubles_logTeffmeanEffective temperature, xgboost-distribution standard deviation (xgbdist_logteff_std) (2)log(K)stat.stdev;phys.temperature.effectivedoubleloggmeanSurface gravity, xgboost-distribution mean value (xgbdist_logg_mean) (2)log(cm.s**-2)phys.gravity;stat.meandoubles_loggmeanSurface gravity, xgboost-distribution standard deviation (xgbdist_logg_std) (2)log(cm.s**-2)stat.stdev;phys.gravitydoubleMassmeanStellar mass, xgboost-distribution mean value (xgbdist_mass_mean) (2)solMassphys.massdoubles_MassmeanStellar mass, xgboost-distribution standard deviation (xgbdist_mass_std) (2)solMassstat.stdev;phys.massdouble