J/AJ/168/282ivo://CDS.VizieR/J/AJ/168/282CDSBrandner W.Sorg A.Roser S.Schilbach E.2025-10-01T06:29:29Z2025-09-11T13:02:00ZCDS support team

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

cds-question@unistra.fropen-star-clustersstellar-distancephotometryvisible-astronomyGaia characterizes the stellar populations of nearby open clusters with unprecedented precision. We investigate the Bohm-Vitense gap, which has been found as a prominent feature in the stellar sequence of open clusters. Using PARSEC isochrone fitting, we derive astrophysical parameters for more than 1100 bona fide single stars each in Praesepe, identify more than 1100 bona fide single stars in the {alpha} Persei (Melotte 20) open cluster, and confirm their approximate match in terms of age (~710 and ~45Myr) and metallicity ([M/H] ~+0.15 and ~+0.13 dex) to the Hyades and Pleiades, respectively. By merging data of the cluster pairs, we improve number statistics. We do not find a clear gap in the combined observational Gabs versus BP - RP color-magnitude diagram (CMD) in the stellar mass range corresponding to the location of the Bohm-Vitense gap. We reproduce gaps in simulated Hyades-type CMDs randomly drawn from an initial mass function. There is no strong evidence for a discontinuity originating in the transition from radiative to convective energy transport in the stellar photosphere. We conclude that the observed gaps in the stellar sequences of open clusters could be explained by small number statistics and the uneven mass-color relation at the transition from spectral type A to F.2024AJ....168..282Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/282CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/337 : Gaia DR1 (Gaia Collaboration, 2016)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)V/80 : Low-Mass Stars' Membership in Alpha Persei Cluster (Prosser 1992)J/A+A/331/81 : Hyades membership (Perryman+ 1998)J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)J/AJ/131/2967 : {alpha} Persei open cluster members (Makarov+, 2006)J/A+A/489/403 : Line abundances for solar stars (Pace+, 2008)J/ApJ/697/1578 : A debris disk study of Praesepe (Gaspar+, 2009)J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diagrams (Gaia Collaboration, 2018)J/A+A/628/A66 : alpha Persei, Pleiades and Praesepe clusters (Lodieu+, 2019)J/A+A/627/A4 : Praesepe (NGC 2632) and its tidal tails (Roeser+, 2019)J/A+A/633/A38 : EW of 10 solar-type stars of Praesepe (D'Orazi+, 2020)J/ApJ/919/100 : Abundances of 6 stars in Praesepe cluster (Vejar+, 2021)J/A+A/668/A4 : LAMOST open clusters (Fu+, 2022)J/MNRAS/509/421 : Galac. metallic. gradient with open clusters (Netopil+ 2022)J/MNRAS/518/662 : Benchmarking MESA isochrones with Hyades (Brandner+, 2023)J/AJ/165/108 : Properties of 600 bona fide stars in Hyades (Brandner+, 2023)J/A+A/677/A162 : Pleiades bonafide single stars (Brandner+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/282https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/282http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/282https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/282https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/282http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/282GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/282/table1 (Candidate members of the Praesepe cluster, classified according to Gaia DR3, sorted by RA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/282/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/282/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/282/table1?GETtext/xml+votable180.050000true86.307075757973777.05543220199410.005555555555555556Cone search capability for table J/AJ/168/282/table2 (Candidate members of the Alpha Persei cluster, classified according to Gaia DR3, sorted by RA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/282/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/282/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/282/table2?GETtext/xml+votable180.050000true26.881067691540950.68902398479750.005555555555555556Cone search capability for table J/AJ/168/282/table6 (Astrophysical parameters of bona fide single stars in the Praesepe open cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/282/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/282/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/282/table6?GETtext/xml+votable180.050000true86.3070761177.055431940.0055555555555555564/110 193 196 293 5/391 395 398 402-403 410-412 414 417 423 428-429 431 433-438 447 456 768 776-778 780 783 800-801 803 805 808 1083 1157-1158 1165 1169-1171 1176-1177 1179-1181 1200 1218 1224 1252 6/979-980 987 989-990 1005 1008-1009 1011 1013-1014 1016 1019 1255 1259 1261 1270-1274 1278-1279 1446 1454 1458 1546 1551 1553 1556 1560 1562 1571 1577 1584-1586 1590-1591 1598-1600 1602-1603 1617-1618 1622-1624 1626 1628-1630 1633-1636 1638-1639 1652 1654-1655 1660-1662 1665-1667 1674-1676 1679 1682-1686 1689-1691 1696-1697 1701 1703-1704 1706-1709 1711 1720 1722-1723 1730-1731 1756 1759 1776 1778 1780-1782 1784-1786 1794-1796 1798 1800-1802 1808 1813 1829-1830 1833 1836-1837 1839-1840 1842 1844 1847 1849 1920 1923 1926 1929-1932 1937 1942 1946 1952-1954 1958 1961-1963 1965 2334 2374-2375 2377 2383-2386 2390 2392 2395-2397 2399 2402 2404-2405 2407 2413-2414 2419 2422-2423 2425-2428 2431 2455 2485 2498 2503 2508 2511 2513-2517 2519-2521 2523-2524 2526 2537 2541 2544-2545 2547-2548 2550 2553 2555-2557 2884 2897 3077-3079 3081 3086 3116-3117 3119 3124-3125 3127 3129-3131 3152-3153 3155 3158-3160 3163-3164 3166-3170 3172 3175-3176 3178-3180 3182-3185 3189-3192 3194 3196 3208 3210 3216-3217 3224-3225 3227 3230 3236 3238-3239 3242 3247-3248 3250-3253 3255-3257 3259-3260 3262-3263 3265 3267 3269 3274 3278 3280-3281 3283-3284 3288-3290 3292-3294 3296 3298 3303 3305-3306 3312 3314 3320 3322 3324 3328 3330 3338 3340-3341 3344 3347 3350 3365-3366 3368-3369 3377-3378 3384 3488-3489 3583 3585 3589 3600-3601 3605-3606 3651 4098 4128 4136 4195 4225 4228 4232 4236 4255 4259-4261 4265 4267 4272 4274-4276 4278-4279 4281-4283 4287 4298-4299 4304 4314 4323 4326 4328 4330 4337-4338 4340 4342-4344 4346 4349-4351 4458 4491 4495 4522-4526 4529 4558 4568-4569 4576 4591 4596 4602 4609 4611-4612 4615 4617 4623-4625 4627 4636-4637 4639 4645 4655 4657-4659 4664 4667-4670 4672-4673 4675 4712-4713 4715 4728-4730 4732-4734 4757 4759 4804-4806 4811 4813-4814 4816 4818-4820 4822-4823 4825 4829 4831 4837 4839 4852-4853 4864 4866 4871 4876-4877 4879 4882-4884 4887 4893-4894 4900 4902 4904 4906-4908 4916 4920 4923 4925-4926 4929 4931-4932 4939 4942 4982-4983 4996 5001 5007 5013 5019 5023 5026 5028 5031 5033 5042 5045 5047 5053 5058 5064 5067 5076-5077 5080 5087 5096 5099 5101 5105 5109 5117 5288 5354 5643 5661 5665 5667 5677 5679 5697 5760 5764-5765 5770 5772-5773 5775 5788 5796 5804 5812-5813 5817-5818 5866 5870 5884 6413 6417 6421 6458 6462 6469 6487 6491 6493 6498 6505 6518-6519 6526 6611 7168 7184 7187 7189 7192 7199-7200 7203 7210 7243 7251-7252 7268 7271 7275 7287 7313 7322 7346 7348-7349 7357 7363 7365 7367-7369 7372 7375 7378-7379 7381 7386 7389-7390 7397 7399 7404 7413-7414 7416 7418-7419 7422 7466 7554 7578 7585 7599 7711 7756-7757 7771 7798 7943 7969 7974 7980 7987 21764 21839 21853-21854 21871 21875-21876 21878-21880 21884 21886 21957 21972-21974 21977 21979 22003 22005-22006 40854 40857-40858 40861 40876-408781.9867573869263685e-19 4.621782916333392e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/282?format=asciiOpticaldefaultJ/AJ/168/282/table1Candidate members of the Praesepe cluster, classified according to Gaia DR3, sorted by RArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source identifiermeta.id;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlcharClass[1/4] Object class (3)meta.code.classintRA_ICRS[86.3/153.1] Barycentric right ascension (ICRS) at Ep=2016.0 (1)degpos.eq.ra;meta.mainDE_ICRS[-9.7/77.1] Barycentric declination (ICRS) at Ep=2016.0 (1)degpos.eq.dec;meta.maindpgeo[96.9/306] Median photogeometric distance posterior (2)pcstat.median;pos.distancefloate_dpgeo[96.1/302.4] The 16th quantile of dpgeopcstat.error;stat.min;pos.distancefloatE_dpgeo[98/309.1] The 84th quantile of dpgeopcstat.error;stat.max;pos.distancefloatGmag[6.1/19.9] Gaia G band (673nm) apparent magnitude (1)magphot.mag;em.optfloate_Gmag[1e-4/7e-3] Uncertainty in Gmagmagstat.error;phot.mag;em.optfloatBPmag[6.3/21.2] Gaia BP band (532nm) apparent magnitude (1)magphot.mag;em.opt.Bfloate_BPmag[2e-4/0.19] Uncertainty in BPmagmagstat.error;phot.mag;em.opt.BfloatRPmag[5.5/19.4] Gaia RP band (797nm) apparent magnitude (1)magphot.mag;em.opt.Rfloate_RPmag[2e-4/0.06] Uncertainty in RPmagmagstat.error;phot.mag;em.opt.RfloatJ/AJ/168/282/table2Candidate members of the Alpha Persei cluster, classified according to Gaia DR3, sorted by RASimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source identifiermeta.id;meta.mainRA_ICRS[26.8/76.1] Barycentric right ascension (ICRS) at Ep=2016.0 (1)degpos.eq.ra;meta.mainDE_ICRS[33.1/64.9] Barycentric declination (ICRS) at Ep=2016.0 (1)degpos.eq.dec;meta.maindpgeo[0/246.7] Median photogeometric distance posterior (2)pcstat.median;pos.distancefloate_dpgeo[0/232.5] The 16th quantile of dpgeopcstat.error;stat.min;pos.distancefloatE_dpgeo[0/333.8] The 84th quantile of dpgeopcstat.error;stat.max;pos.distancefloatGmag[3.9/19.9] Gaia G band (673nm) apparent magnitude (1)magphot.mag;em.optfloate_Gmag[1e-4/7e-3] Uncertainty in Gmagmagstat.error;phot.mag;em.optfloatBPmag[3.9/21.8] Gaia BP band (532nm) apparent magnitude (1)magphot.mag;em.opt.Bfloate_BPmag[2e-4/0.3] Uncertainty in BPmagmagstat.error;phot.mag;em.opt.BfloatRPmag[3.9/19.8] Gaia RP band (797nm) apparent magnitude (1)magphot.mag;em.opt.Rfloate_RPmag[2e-4/0.1] Uncertainty in RPmagmagstat.error;phot.mag;em.opt.RfloatClass[1/4] Object class (3)meta.code.classintJ/AJ/168/282/table6Astrophysical parameters of bona fide single stars in the Praesepe open clustere_BPmag[2e-4/0.2] Uncertainty in BPmagmagstat.error;phot.mag;em.opt.BfloatRPmag[7.1/17.7] Gaia RP band (797nm) apparent magnitude (1)magphot.mag;em.opt.Rfloate_RPmag[2e-4/0.02] Uncertainty in RPmagmagstat.error;phot.mag;em.opt.Rfloatmass[0.19/2.2] Mass (3)solMassphys.massfloate_mass[3e-3/0.1] Uncertainty in masssolMassstat.error;phys.massfloatlogT[3.4/4] Log effective temperature (3)log(K)phys.temperature.effectivefloatSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source identifiermeta.id;meta.mainRA_ICRS[86.3/153.1] Barycentric right ascension (ICRS) at Ep=2016.0 (1)degpos.eq.ra;meta.mainDE_ICRS[-9.7/77.1] Barycentric declination (ICRS) at Ep=2016.0 (1)degpos.eq.dec;meta.maindpgeo[96.9/306] Median photogeometric distance posterior (2)pcstat.median;pos.distancefloate_dpgeo[96.1/302.4] The 16th quantile of dpgeopcstat.error;stat.min;pos.distancefloatE_dpgeo[98/309.1] The 84th quantile of dpgeopcstat.error;stat.max;pos.distancefloatGmag[7.3/19] Gaia G band (673nm) apparent magnitude (1)magphot.mag;em.optfloate_Gmag[1e-4/3e-3] Uncertainty in Gmagmagstat.error;phot.mag;em.optfloatBPmag[7.4/21] Gaia BP band (532nm) apparent magnitude (1)magphot.mag;em.opt.Bfloate_logT[1e-3/0.03] Uncertainty in logTlog(K)stat.error;phys.temperature.effectivefloatlogL[-2.5/1.5] Log Luminosity (3)log(solLum)phys.luminosityfloate_logL[7e-3/0.32] Uncertainty in logLlog(solLum)stat.error;phys.luminosityfloatlogg[3.8/5.02] Log surface gravity (3)log(cm.s**-2)phys.gravityfloate_logg[1e-3/0.07] Uncertainty in logglog(cm.s**-2)stat.error;phys.gravityfloat