J/MNRAS/502/32      Evolutionary traits for stellar phylogeny  (Jackson+, 2021)

Using heritability of stellar chemistry to reveal the history of the Milky Way. Jackson H., Jofre P., Yaxley K., Das P., de Brito Silva D., Foley R. <Mon. Not. R. Astron. Soc. 502, 32-47 (2021)> =2021MNRAS.502...32J 2021MNRAS.502...32J (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, nearby ; Stars, G-type ; Abundances Keywords: stars: abundances - stars: evolution - Galaxy: evolution Abstract: Since chemical abundances are inherited between generations of stars, we use them to trace the evolutionary history of our Galaxy. We present a robust methodology for creating a phylogenetic tree, a biological tool used for centuries to study heritability. Combining our phylogeny with information on stellar ages and dynamical properties, we reconstruct the shared history of 78 stars in the Solar Neighbourhood. The branching pattern in our tree supports a scenario in which the thick disk is an ancestral population of the thin disk. The transition from thick to thin disk shows an anomaly, which we attribute to a star formation burst. Our tree shows a further signature of the variability in stars similar to the Sun, perhaps linked to a minor star formation enhancement creating our Solar System. In this paper, we demonstrate the immense potential of a phylogenetic perspective and interdisciplinary collaboration, where with borrowed techniques from biology we can study key processes that have contributed to the evolution of the Milky Way. Description: Chemical abundance and kinematic data and errors are given for a sample of 78 solar twins (including the Sun). We use chemical abundances and stellar ages that have been determined and published for this sample by Bedell et al. (2018, Cat. J/ApJ/865/68). Since many chemical elements are produced at similar astrophysical sites, we have chosen traits that are evolutionary informative (Jofre et al., 2020, Cat. J/A+A/633/L9). We select the abundance ratios presented in Jofre et al. (2020, Cat. J/A+A/633/L9) to produce our evolutionary tree. These correspond to [C/Y], [C/Zr], [C/Ba], [C/La], [C/Ce], [C/Nd], [O/Y], [O/Ba], [Na/Sr], [Na/Y], [Na/Zr], [Na/Ba], [Na/La], [Na/Ce], [Na/Nd], [Mg/Sr], [Mg/Y], [Mg/Zr], [Mg/Ba], [Mg/La], [Mg/Ce], [Mg/Nd], [Al/Y], [Al/Ba], [Si/Zr], [Si/Ba], [Si/La], [Si/Ce], [Ca/Ba], [Sc/Sr], [Sc/Y], [Sc/Zr], [Sc/Ba], [Sc/La], [Sc/Ce], [Sc/Ba], [Ti/Y], [Ti/Ba], [Ti/Ba], [Mn/Y], [Mn/Ba], [Co/Ba], [Ni/Sr], [Ni/Y], [Ni/Zr], [Ni/Ba], [Ni/La], [Ni/Ce], [Cu/Sr], [Cu/Y], [Cu/Zr], [Cu/Ba], [Cu/La], [Cu/Ce], [Zn/Ba]. Kinematic information is taken from the HARPS data and the second data release (DR2) of Gaia (Gaia Collaboration et al., 2018, Cat. I/345). The kinematics are analysed in terms of actions and birth radii. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table.dat 1076 79 *Abundance ratios and kinematics for 78 stars and the Sun -------------------------------------------------------------------------------- Note on table.dat: Chemical abundances and ages have been determined and published by Bedell et al. (2018, Cat. J/ApJ/865/68) -------------------------------------------------------------------------------- See also: J/ApJ/865/68 : Abundances for 79 Sun-like stars within 100pc (Bedell+, 2018) J/A+A/633/L9 : Linear regression fit coefficients (Jofre+, 2020) Byte-by-byte Description of file: table.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- Star Star HIP number 11- 18 A8 --- --- [Gaia DR2] 20- 38 I19 --- GaiaDR2 ? Gaia DR2 source identifier 40 A1 --- Group [BSTY] Group in phylogenetic tree (1) 42- 44 F3.1 Gyr Age Stellar age 46- 56 F11.9 Gyr e_Age ? Stellar age error 58- 63 F6.3 [-] [Fe/H] Metallicity 65- 69 F5.3 [-] e_[Fe/H] ? Metallicity error 71- 74 I4 K Teff ? Effective temperature 76- 80 F5.3 [cm/s2] logg ? Surface gravity 82- 92 F11.9 Rsun R ? Radius 94- 104 E11.9 Rsun e_R ? Radius error 106- 117 F12.9 kpc z ? Galactocentric z position 119- 129 E11.9 kpc e_z ? Galactocentric z position error 131- 144 F14.9 km/s U ? Galactic velocity U 146- 156 F11.9 km/s e_U ? Galactic velocity U error 158- 171 F14.9 km/s V ? Galactic velocity V 173- 183 F11.9 km/s e_V ? Galactic velocity V error 185- 197 F13.9 km/s W ? Galactic velocity W 199- 209 F11.9 km/s e_W ? Galactic velocity W error 211- 222 F12.5 km2/s2 u ? Orbital energy 224- 236 F13.9 km2/s2 e_u ? Orbital energy error 238- 250 F13.9 kpc.km/s Jr ? Radial action 252- 262 F11.9 kpc.km/s e_Jr ? Radial action error 264- 275 F12.9 kpc.km/s Jz ? Vertical action 277- 287 E11.9 kpc.km/s e_Jz ? Vertical action error 289- 299 F11.6 kpc.km/s Lz ? Z component of angular momentum 301- 312 F12.9 kpc.km/s e_Lz ? Z component of angular momentum error 314- 324 F11.9 Rsun Rb ? Birth radius 326- 336 F11.9 Rsun e_Rb ? Birth radius error 338- 349 F12.9 kpc zb ? Birth Galactocentric z position 351- 361 F11.9 kpc e_zb ? Birth Galactocentric z position error 363- 368 F6.3 --- [CI/YII] CI/YII abundance ratio 370- 374 F5.3 --- e_[CI/YII] CI/YII abundance ratio error 376- 381 F6.3 --- [CI/ZrII] CI/ZrII abundance ratio 383- 387 F5.3 --- e_[CI/ZrII] CI/ZrII abundance ratio error 389- 394 F6.3 --- [CI/BaII] CI/BaII abundance ratio 396- 400 F5.3 --- e_[CI/BaII] CI/BaII abundance ratio error 402- 407 F6.3 --- [CI/LaII] CI/LaII abundance ratio 409- 413 F5.3 --- e_[CI/LaII] CI/LaII abundance ratio error 415- 420 F6.3 --- [CI/CeII] CI/CeII abundance ratio 422- 426 F5.3 --- e_[CI/CeII] CI/CeII abundance ratio error 428- 433 F6.3 --- [CI/NdII] CI/NdII abundance ratio 435- 439 F5.3 --- e_[CI/NdII] CI/NdII abundance ratio error 441- 446 F6.3 --- [OI/YII] OI/YII abundance ratio 448- 452 F5.3 --- e_[OI/YII] OI/YII abundance ratio error 454- 459 F6.3 --- [OI/BaII] OI/BaII abundance ratio 461- 465 F5.3 --- e_[OI/BaII] OI/BaII abundance ratio error 467- 472 F6.3 --- [NaI/SrI] NaI/SrI abundance ratio 474- 478 F5.3 --- e_[NaI/SrI] NaI/SrI abundance ratio error 480- 485 F6.3 --- [NaI/YII] NaI/YII abundance ratio 487- 491 F5.3 --- e_[NaI/YII] NaI/YII abundance ratio error 493- 498 F6.3 --- [NaI/ZrII] NaI/ZrII abundance ratio 500- 504 F5.3 --- e_[NaI/ZrII] NaI/ZrII abundance ratio error 506- 511 F6.3 --- [NaI/BaII] NaI/BaII abundance ratio 513- 517 F5.3 --- e_[NaI/BaII] NaI/BaII abundance ratio error 519- 524 F6.3 --- [NaI/LaII] NaI/LaII abundance ratio 526- 530 F5.3 --- e_[NaI/LaII] NaI/LaII abundance ratio error 532- 537 F6.3 --- [NaI/CeII] NaI/CeII abundance ratio 539- 543 F5.3 --- e_[NaI/CeII] NaI/CeII abundance ratio error 545- 550 F6.3 --- [NaI/NdII] NaI/NdII abundance ratio 552- 556 F5.3 --- e_[NaI/NdII] NaI/NdII abundance ratio error 558- 563 F6.3 --- [MgI/SrI] MgI/SrI abundance ratio 565- 569 F5.3 --- e_[MgI/SrI] MgI/SrI abundance ratio error 571- 576 F6.3 --- [MgI/YII] MgI/YII abundance ratio 578- 582 F5.3 --- e_[MgI/YII] MgI/YII abundance ratio error 584- 589 F6.3 --- [MgI/ZrII] MgI/ZrII abundance ratio 591- 595 F5.3 --- e_[MgI/ZrII] MgI/ZrII abundance ratio error 597- 602 F6.3 --- [MgI/BaII] MgI/BaII abundance ratio 604- 608 F5.3 --- e_[MgI/BaII] MgI/BaII abundance ratio error 610- 615 F6.3 --- [MgI/LaII] MgI/LaII abundance ratio 617- 621 F5.3 --- e_[MgI/LaII] MgI/LaII abundance ratio error 623- 628 F6.3 --- [MgI/CeII] MgI/CeII abundance ratio 630- 634 F5.3 --- e_[MgI/CeII] MgI/CeII abundance ratio error 636- 641 F6.3 --- [MgI/NdII] MgI/NdII abundance ratio 643- 647 F5.3 --- e_[MgI/NdII] MgI/NdII abundance ratio error 649- 654 F6.3 --- [AlI/YII] AlI/YII abundance ratio 656- 660 F5.3 --- e_[AlI/YII] AlI/YII abundance ratio error 662- 667 F6.3 --- [AlI/BaII] AlI/BaII abundance ratio 669- 673 F5.3 --- e_[AlI/BaII] AlI/BaII abundance ratio error 675- 680 F6.3 --- [SiI/ZrII] SiI/ZrII abundance ratio 682- 686 F5.3 --- e_[SiI/ZrII] SiI/ZrII abundance ratio error 688- 693 F6.3 --- [SiI/BaII] SiI/BaII abundance ratio 695- 699 F5.3 --- e_[SiI/BaII] SiI/BaII abundance ratio error 701- 706 F6.3 --- [SiI/LaII] SiI/LaII abundance ratio 708- 712 F5.3 --- e_[SiI/LaII] SiI/LaII abundance ratio error 714- 719 F6.3 --- [SiI/CeII] SiI/CeII abundance ratio 721- 725 F5.3 --- e_[SiI/CeII] SiI/CeII abundance ratio error 727- 732 F6.3 --- [CaI/BaII] CaI/BaII abundance ratio 734- 738 F5.3 --- e_[CaI/BaII] CaI/BaII abundance ratio error 740- 745 F6.3 --- [ScI/SrI] ScI/SrI abundance ratio 747- 751 F5.3 --- e_[ScI/SrI] ScI/SrI abundance ratio error 753- 758 F6.3 --- [ScI/YII] ScI/YII abundance ratio 760- 764 F5.3 --- e_[ScI/YII] ScI/YII abundance ratio error 766- 771 F6.3 --- [ScI/ZrII] ScI/ZrII abundance ratio 773- 777 F5.3 --- e_[ScI/ZrII] ScI/ZrII abundance ratio error 779- 784 F6.3 --- [ScI/BaII] ScI/BaII abundance ratio 786- 790 F5.3 --- e_[ScI/BaII] ScI/BaII abundance ratio error 792- 797 F6.3 --- [ScI/LaII] ScI/LaII abundance ratio 799- 803 F5.3 --- e_[ScI/LaII] ScI/LaII abundance ratio error 805- 810 F6.3 --- [ScI/CeII] ScI/CeII abundance ratio 812- 816 F5.3 --- e_[ScI/CeII] ScI/CeII abundance ratio error 818- 823 F6.3 --- [ScII/BaII] ScII/BaII abundance ratio 825- 829 F5.3 --- e_[ScII/BaII] ScII/BaII abundance ratio error 831- 836 F6.3 --- [TiI/YII] TiI/YII abundance ratio 838- 842 F5.3 --- e_[TiI/YII] TiI/YII abundance ratio error 844- 849 F6.3 --- [TiI/BaII] TiI/BaII abundance ratio 851- 855 F5.3 --- e_[TiI/BaII] TiI/BaII abundance ratio error 857- 862 F6.3 --- [TiII/BaII] TiII/BaII abundance ratio 864- 868 F5.3 --- e_[TiII/BaII] TiII/BaII abundance ratio error 870- 875 F6.3 --- [MnI/YII] MnI/YII abundance ratio 877- 881 F5.3 --- e_[MnI/YII] MnI/YII abundance ratio error 883- 888 F6.3 --- [MnI/BaII] MnI/BaII abundance ratio 890- 894 F5.3 --- e_[MnI/BaII] MnI/BaII abundance ratio error 896- 901 F6.3 --- [CoI/BaII] CoI/BaII abundance ratio 903- 907 F5.3 --- e_[CoI/BaII] CoI/BaII abundance ratio error 909- 914 F6.3 --- [NiI/SrI] NiI/SrI abundance ratio 916- 920 F5.3 --- e_[NiI/SrI] NiI/SrI abundance ratio error 922- 927 F6.3 --- [NiI/YII] NiI/YII abundance ratio 929- 933 F5.3 --- e_[NiI/YII] NiI/YII abundance ratio error 935- 940 F6.3 --- [NiI/ZrII] NiI/ZrII abundance ratio 942- 946 F5.3 --- e_[NiI/ZrII] NiI/ZrII abundance ratio error 948- 953 F6.3 --- [NiI/BaII] NiI/BaII abundance ratio 955- 959 F5.3 --- e_[NiI/BaII] NiI/BaII abundance ratio error 961- 966 F6.3 --- [NiI/LaII] NiI/LaII abundance ratio 968- 972 F5.3 --- e_[NiI/LaII] NiI/LaII abundance ratio error 974- 979 F6.3 --- [NiI/CeII] NiI/CeII abundance ratio 981- 985 F5.3 --- e_[NiI/CeII] NiI/CeII abundance ratio error 987- 992 F6.3 --- [CuI/SrI] CuI/SrI abundance ratio 994- 998 F5.3 --- e_[CuI/SrI] CuI/SrI abundance ratio error 1000-1005 F6.3 --- [CuI/YII] CuI/YII abundance ratio 1007-1011 F5.3 --- e_[CuI/YII] CuI/YII abundance ratio error 1013-1018 F6.3 --- [CuI/ZrII] CuI/ZrII abundance ratio 1020-1024 F5.3 --- e_[CuI/ZrII] CuI/ZrII abundance ratio error 1026-1031 F6.3 --- [CuI/BaII] CuI/BaII abundance ratio 1033-1037 F5.3 --- e_[CuI/BaII] CuI/BaII abundance ratio error 1039-1044 F6.3 --- [CuI/LaII] CuI/LaII abundance ratio 1046-1050 F5.3 --- e_[CuI/LaII] CuI/LaII abundance ratio error 1052-1057 F6.3 --- [CuI/CeII] CuI/CeII abundance ratio 1059-1063 F5.3 --- e_[CuI/CeII] CuI/CeII abundance ratio error 1065-1070 F6.3 --- [ZnI/BaII] ZnI/BaII abundance ratio 1072-1076 F5.3 --- e_[ZnI/BaII] ZnI/BaII abundance ratio error -------------------------------------------------------------------------------- Note (1): Group in phylogenetic tree code as follows: Y = young S = solar contemporaries B = burst T = thick disk -------------------------------------------------------------------------------- Acknowledgements: Paula Jofre, paula.jofre(at)mail.udp.cl Holly Jackson, hjackson(at)mit.edu
(End) Patricia Vannier [CDS] 22-Jan-2021
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