J/A+A/690/A323ivo://CDS.VizieR/J/A+A/690/A323doi:10.26093/cds/vizier.36900323CDSValle G.Dell'Omodarme M.Prada Moroni P.G.Degl'Innocenti S.2025-07-03T20:01:08Z2024-10-22T10:41:08ZCDS support team

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

cds-question@unistra.frinfrared-sourcesgiant-starsstellar-massesstellar-agesstellar-radiiBy adopting the recently empirically derived dependence of {alpha}-elements on [alpha/Fe] instead of the conventionally applied uniform one, we tested the agreement between stellar model predictions and observations for RGB stars in the APO-K2 catalogue. We particularly focused on the biases in effective temperature scales and on the robustness of age estimations. A slight {DELTA}T difference of 25K was detected between stars with high and low {alpha}-enhancement. A multivariate analysis reveals a dependence of {DELTA}T on both [Fe/H] and [{alpha}/Fe], and highlights a significant dependence on stellar mass. Despite differences in assumed chemical composition, our analysis, through a fortunate cancellation effect, yields ages that are largely consistent with recent studies of the same sample. Notably, our analysis identifies a 6% fraction of stars younger than 4 Ga within the high-{alpha} population. However, our analysis of the [C/N] ratio supports the possible origin of the these stars as a result of mergers or mass transfer events.2024A&A...690A.323Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A323CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/167/50 : The APO-K2 Catalog. I. 7672 Red giants (Schonhut-Stasik+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/690/A323https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/690/A323http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/690/A323https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/690/A323https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/690/A323http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/690/A323GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/690/A323/table2 (Grid-based estimates of age, mass, and radius for the selected RGB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A323/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A323/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A323/table2?GETtext/xml+votable180.050000true202.7142814-3.04982920.0055555555555555564/17 5/75-76 78 88-90 94 101-102 113 115-116 266 1063 1067-1069 1074 1155 1165 1168 1170 1174 1178-1179 1182-1183 1200 1204 4287 4322-4323 4326-4327 4330-4331 4334 4503 4509 4532 4577 4579 4582-4583 4588 4590 4612-4613 4616-4617 4622-4623 4634 4642-4643 4647 4653 4665 4675 4680-4681 4683-4685 4687-4688 4690 4696 4698 5870-5871 5882 6060-6061 6072 6402 6404 6406 6409 6411-6413 6415 6423-6424 6462 6542 6563-6564 6569-6570 6743 6757 6764 6773 6780 6852 6855 6859 6877 6921 7302 7329 7331 7337 10733 10749 11094 11182 11192 12007 12125 6/261 263 267 270-271 289 291-293 295 308 310-311 316-317 319-320 322 328 330 334-337 339-342 346 349 364 366-370 375 381 383 388-389 391 397 400 402-403 412-413 415 437 439 448-450 456 458-459 468 470-473 476-478 480-482 484 1026 1029-1031 1033 1041 1044 1046 1050 1053 1055 1058-1059 1077 1098 4246-4247 4250-4251 4263 4280 4282 4285-4287 4290 4295 4300-4301 4303 4306 4312-4314 4318-4322 4327-4328 4330-4331 4333 4335-4336 4341 4343 4345-4346 4488 4490-4491 4522-4523 4526-4527 4531 4536-4537 4613 4615 4624 4627 4629 4631-4632 4634-4635 4637-4639 4645 4657 4659 4668-4669 4671 4687 4704 4706-4708 4710-4711 4720-4721 4723-4724 4726-4727 4756-4757 4805 4820 4865-4869 4871 4880 4883 4898-4900 4902-4905 4907-4908 17142-17143 17145 17147 17313-17318 17328-17330 17332-17334 17342 17352 17354 17376 17379 17381-17383 17388-17389 17394 17400 17975 17991 17997-17999 18003 18006 18009-18011 18018-18020 18023-18024 18028-18029 18031-18032 18034-18035 18040-18041 18044-18045 18113-18116 18118 18121 18123 18125-18127 18132-18133 18135 18137-18139 18141-18143 18145 18149-18151 18160-18161 18163-18165 18167 18171-18172 18175 18178-18179 18185 18222-18223 18225-18228 18230 18233 18236 18304-18306 18313-18315 18320 18322 18336-18337 18340-18342 18345-18350 18432-18433 18435-18436 18438-18439 18441 18443-18444 18446-18447 18456 18458-18459 18474-18476 18478-18479 18481-18484 18486 18498 18510 18516-18517 18525 18532-18533 18542 18544 18549 18551 18560-18561 18564-18565 18577-18582 18584-18586 18592 18599 18605 18608-18610 18616-18617 18620-18621 18624-18625 18627 18630-18633 18635-18636 18642-18643 18648-18649 18652 18657-18659 18664-18665 18668 18690-18692 18694-18698 18705 18707 18709-18710 18713 18715-18716 18718 18728-18729 18744 18747 18766 18790 18796-18797 18799 18821 18823 18832-18833 18835-18837 18880-18881 18885 19537 19540 19713 23471 23519 23522-23523 23526 23532-23533 23538 23542 23546-23548 23550 24105 24110 24113-24115 24120-24121 24193 24199-24200 24202 24204-24206 24216 24222-24224 24227 24229-24230 24233 24236 24248 24251 24253-24254 24266 24296-24298 24927 25425-25426 25428 25430 25433 25533 25543 25549 25551 25563 25576-25577 25579-25580 25582 25585-25586 25589-25593 25595 25603 25605 25607 25612 25614-25615 25622 25628 25630-25633 25641-25643 25656-25657 25659 25667 25670 25672-25673 25675-25678 25681 25683-25684 25686-25687 25689-25691 25701 25704 25706 25709 25713-25714 25722 25726 25728-25729 25732 25734 25748-25749 25757-25759 25780-25781 25802 25809 25812 25814-25815 25824 25843 25846 25852-25854 26017 26024 26113-26115 26118 26121 26124 26162-26163 26172 26174 26177-26179 26193 26196 26241 26243 26246-26247 26260 26262-26264 26266 26268 26270 26273-26275 26284 26905 26907 26910-26911 26928-26929 26931-26932 26941-26943 26945 26958 26971 26978 26980-26981 26984 26986 26990-26991 26997 27002-27003 27006-27007 27025 27045 27047 27049 27051-27052 27054-27055 27061 27066 27076-27078 27080-27082 27084 27089 27091 27097-27099 27101 27104-27106 27125 27223 27392-27394 27396-27397 27412 27414 27417-27418 27426-27427 27429-27433 27442-27443 27445-27450 27452 27456-27457 27459-27460 27462 27464 27466 27469 27471 27480 27482-27483 27486 27488-27489 27491-27492 27494-27495 27498-27501 27504 27513-27517 27525 27536-27537 27542-27543 27548-27549 27584-27586 27590-27591 27596-27597 27600 27602 27608 27658-27660 27662-27663 27681 27693-27695 27704 27706 27786-27787 27808 27810 28826 28838 28843 28896 28941 28943 28952 28954 28959 28981 28996 29005 29024 29026 29207 29214 29221 29224 29226 29231 29233 29242 29245 29250 29256 29281 29292 29295 29304 29321 29328-29329 29353-29355 29379 42862 42865 42868 42870 42877 42907 42909 42929 42941 42943 42952-42954 42978-42979 42984-42986 42989 42994 43002 44304-44305 44307-44308 44310-44311 44317 44319 44357-44358 44360-44362 44365-44367 44388 44717 44719 44722-44723 44732-44734 44774 44776-44777 44779-44780 44782 48022-48023 48046 48059 48072 48478 48511 48596-48597 48599 48605 48607https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/690/A323?format=asciiInfrareddefaultJ/A+A/690/A323/table2Grid-based estimates of age, mass, and radius for the selected RGB starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (2MHHMMSSss+DDMMSSS)meta.id;meta.maincharAgeAgeGyrtime.agefloate_AgeAge lower errorGyrstat.error;time.agefloatE_AgeAge upper errorGyrstat.error;stat.maxfloatMassMasssolMassphys.massfloate_MassMass lower errorsolMassstat.error;phys.massfloatE_MassMass upper errorsolMassstat.error;stat.maxfloatRadRadiussolRadphys.size.radiusfloate_RadRadius lower errorsolRadstat.errorfloatE_RadRadius upper errorsolRadstat.error;stat.maxfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main