The evolution of the Milky Way's thin disc radial metallicity gradient with K2 asteroseismic ages

被引:14
作者
Willett, Emma [1 ]
Miglio, Andrea [1 ,2 ,3 ]
Mackereth, J. Ted [4 ,5 ]
Chiappini, Cristina [6 ]
Lyttle, Alexander J. [1 ]
Elsworth, Yvonne [1 ]
Mosser, Benoit [7 ]
Khan, Saniya [8 ]
Anders, Friedrich [9 ,10 ,11 ]
Casali, Giada [2 ,3 ]
Grisoni, Valeria [2 ,3 ]
机构
[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
[2] Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy
[3] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy
[4] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada
[5] Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada
[6] Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany
[7] Univ Paris, Sorbonne Univ, Univ PSL, LESIA,Observ Paris,CNRS, F-92195 Meudon, France
[8] EPFL, Observ Sauverny, Inst Phys, Astrophys Lab, CH-1290 Versoix, Switzerland
[9] Univ Barcelona, Dept Fis Quant & Astrofis FQA, Marti i Franques 1, E-08028 Barcelona, Spain
[10] Univ Barcelona, Inst Ciencies Cosmos ICCUB, Marti i Franques 1, E-08028 Barcelona, Spain
[11] IEEC, Gran Capita 2-4, E-08034 Barcelona, Spain
基金
美国安德鲁·梅隆基金会; 英国科学技术设施理事会;
关键词
asteroseismology; stars: abundances; Galaxy: abundances; Galaxy: disc; Galaxy: evolution; Galaxy: stellar content; 6TH DATA RELEASE; CHEMICAL EVOLUTION; ABUNDANCE GRADIENTS; SOLAR NEIGHBORHOOD; GALACTIC DISC; WAY DISK; CHEMODYNAMICAL EVOLUTION; PHYSICAL PARAMETERS; LOCAL KINEMATICS; ORBIT MIGRATION;
D O I
10.1093/mnras/stad2374
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The radial metallicity distribution of the Milky Way's disc is an important observational constraint for models of the formation and evolution of our Galaxy. It informs our understanding of the chemical enrichment of the Galactic disc and the dynamical processes therein, particularly radial migration. We investigate how the metallicity changes with guiding radius in the thin disc using a sample of red giant stars with robust astrometric, spectroscopic, and asteroseismic parameters. Our sample contains 668 stars with guiding radii 4 < R-g < 11 kpc and asteroseismic ages covering the whole history of the thin disc with precision approximate to 25 per cent. We use MCMC analysis to measure the gradient and its intrinsic spread in bins of age and construct a hierarchical Bayesian model to investigate the evolution of these parameters independently of the bins. We find a smooth evolution of the gradient from approximate to-0.07 dex kpc(-1) in the youngest stars to approximate to-0.04 dex kpc(-1) in stars older than 10 Gyr, with no break at intermediate ages. Our results are consistent with those based on asteroseismic ages from CoRoT, with that found in Cepheid variables for stars younger than 1 Gyr, and with open clusters for stars younger than 6 Gyr. For older stars we find a significantly lower metallicity in our sample than in the clusters, suggesting a survival bias favouring more metal-rich clusters. We also find that the chemical evolution model of Chiappini '09 is too metal poor in the early stages of disc formation. Our results provide strong new constraints for the growth and enrichment of the thin disc and radial migration, which will facilitate new tests of model conditions and physics.
引用
收藏
页码:2141 / 2155
页数:15
相关论文
共 105 条
[1]   The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar, and APOGEE-2 Data [J].
Abdurro'uf ;
Accetta, Katherine ;
Aerts, Conny ;
Aguirre, Victor Silva ;
Ahumada, Romina ;
Ajgaonkar, Nikhil ;
Ak, N. Filiz ;
Alam, Shadab ;
Prieto, Carlos Allende ;
Almeida, Andres ;
Anders, Friedrich ;
Anderson, Scott F. ;
Andrews, Brett H. ;
Anguiano, Borja ;
Aquino-Ortiz, Erik ;
Aragon-Salamanca, Alfonso ;
Argudo-Fernandez, Maria ;
Ata, Metin ;
Aubert, Marie ;
Avila-Reese, Vladimir ;
Badenes, Carles ;
Barba, Rodolfo H. ;
Barger, Kat ;
Barrera-Ballesteros, Jorge K. ;
Beaton, Rachael L. ;
Beers, Timothy C. ;
Belfiore, Francesco ;
Bender, Chad F. ;
Bernardi, Mariangela ;
Bershady, Matthew A. ;
Beutler, Florian ;
Bidin, Christian Moni ;
Bird, Jonathan C. ;
Bizyaev, Dmitry ;
Blanc, Guillermo A. ;
Blanton, Michael R. ;
Boardman, Nicholas Fraser ;
Bolton, Adam S. ;
Boquien, Mederic ;
Borissova, Jura ;
Bovy, Jo ;
Brandt, W. N. ;
Brown, Jordan ;
Brownstein, Joel R. ;
Brusa, Marcella ;
Buchner, Johannes ;
Bundy, Kevin ;
Burchett, Joseph N. ;
Bureau, Martin ;
Burgasser, Adam .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2022, 259 (02)
[2]   Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way's radial metallicity gradient [J].
Anders, F. ;
Chiappini, C. ;
Minchev, I. ;
Miglio, A. ;
Montalban, J. ;
Mosser, B. ;
Rodrigues, T. S. ;
Santiago, B. X. ;
Baudin, F. ;
Beers, T. C. ;
da Costa, L. N. ;
Garcia, R. A. ;
Garcia-Hernandez, D. A. ;
Holtzman, J. ;
Maia, M. A. G. ;
Majewski, S. ;
Mathur, S. ;
Noels-Grotsch, A. ;
Pan, K. ;
Schneider, D. P. ;
Schultheis, M. ;
Steinmetz, M. ;
Valentini, M. ;
Zamora, O. .
ASTRONOMY & ASTROPHYSICS, 2017, 600
[3]   Galactic archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE [J].
Anders, F. ;
Chiappini, C. ;
Rodrigues, T. S. ;
Miglio, A. ;
Montalban, J. ;
Mosser, B. ;
Girardi, L. ;
Valentini, M. ;
Noels, A. ;
Morel, T. ;
Johnson, J. A. ;
Schultheis, M. ;
Baudin, F. ;
Peralta, R. de Assis ;
Hekker, S. ;
Themessl, N. ;
Kallinger, T. ;
Garcia, R. A. ;
Mathur, S. ;
Baglin, A. ;
Santiago, B. X. ;
Martig, M. ;
Minchev, I. ;
Steinmetz, M. ;
da Costa, L. N. ;
Maia, M. A. G. ;
Allende Prieto, C. ;
Cunha, K. ;
Beers, T. C. ;
Epstein, C. ;
Garcia Perez, A. E. ;
Garcia-Hernandez, D. A. ;
Harding, P. ;
Holtzman, J. ;
Majewski, S. R. ;
Meszaros, Sz. ;
Nidever, D. ;
Pan, K. ;
Pinsonneault, M. ;
Schiavon, R. P. ;
Schneider, D. P. ;
Shetrone, M. D. ;
Stassun, K. ;
Zamora, O. ;
Zasowski, G. .
ASTRONOMY & ASTROPHYSICS, 2017, 597
[4]   Chemodynamics of the Milky Way I. The first year of APOGEE data [J].
Anders, F. ;
Chiappini, C. ;
Santiago, B. X. ;
Rocha-Pinto, H. J. ;
Girardi, L. ;
da Costa, L. N. ;
Maia, M. A. G. ;
Steinmetz, M. ;
Minchev, I. ;
Schultheis, M. ;
Boeche, C. ;
Miglio, A. ;
Montalban, J. ;
Schneider, D. P. ;
Beers, T. C. ;
Cunha, K. ;
Allende Prieto, C. ;
Balbinot, E. ;
Bizyaev, D. ;
Brauer, D. E. ;
Brinkmann, J. ;
Frinchaboy, P. M. ;
Perez, A. E. Garcia ;
Hayden, M. R. ;
Hearty, F. R. ;
Holtzman, J. ;
Johnson, J. A. ;
Kinemuchi, K. ;
Majewski, S. R. ;
Malanushenko, E. ;
Malanushenko, V. ;
Nidever, D. L. ;
O'Connell, R. W. ;
Pan, K. ;
Robin, A. C. ;
Schiavon, R. P. ;
Shetrone, M. ;
Skrutskie, M. F. ;
Smith, V. V. ;
Stassun, K. ;
Zasowski, G. .
ASTRONOMY & ASTROPHYSICS, 2014, 564
[5]  
Baglin A., 2006, 36 COSPAR SCI ASSEMB, P3749
[6]   H II REGION METALLICITY DISTRIBUTION IN THE MILKY WAY DISK [J].
Balser, Dana S. ;
Rood, Robert T. ;
Bania, T. M. ;
Anderson, L. D. .
ASTROPHYSICAL JOURNAL, 2011, 738 (01)
[7]   From dawn till disc: Milky Way's turbulent youth revealed by the APOGEE plus Gaia data [J].
Belokurov, Vasily ;
Kravtsov, Andrey .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 514 (01) :689-714
[8]   Vertical waves in the solar neighbourhood in Gaia DR2 [J].
Bennett, Morgan ;
Bovy, Jo .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 482 (01) :1417-1425
[9]  
Bingham E, 2019, J MACH LEARN RES, V20