Die Entstehung der Milchstraße verstehen
Zusammenfassung der Projektergebnisse
One of the main goals of the project was understanding the formation of the Milky Way thick disk. This was initiated right before the start of the project but was extended by Minchev and Martig to establish the validity of our results that are now well accepted by the community. Our new interpretation of thick disk structure - that they are composed by the imbedded flares of mono-age population – has sparked a series of works looking for (and finding) flaring in Milky Way surveys, e.g., APOGEE, LAMOST, or the effects of such in the solar vicinity (Gaia-ESO survey, HARPS data). Another major goal was the improvement of the MCM13 model by running new cosmological simulation for chemo-dynamical models. We wrote a successful proposal (30.3 Million CPU hours on SuperMUC, LRZ) to run a new generation of cosmological simulations with constrained initial conditions - “The Hestia Simulations” with Pi N. Libeskind, AIP. These simulations are currently running and are in a testing stage before used for scientific exploitation. The ultimate goal of any Galactic Archaeology related project is recovering the stellar birth positions and the chemical evolution history of the Milky Way. We have made a big step in that direction by developing a new, largely model-independent method. Unlike our initial proposal to use a range of hybrid models in the vain of MCM13, we have stumbled upon this new technique that has proved extremely promising for advancing the field. In addition to the immediate discoveries (related to the AMR, age-velocity relation, the origin of metal rich stars and the effect of flaring in the solar vicinity), our new method can be used to create a new data-driven chemical evolution model for the Galaxy completely based on observations, (through a Bayesian machinery) being constrained by the migration history and the time evolution of the ISM abundance gradient of 15+ elements as observed in surveys, such as GALAH, APOGEE, Gaia- ESO and WAVE, 4MOST in the near future. A surprise was our stumbling upon the new technique for recovering stellar birth radii in any data set with good abundance and age measurements, which gave as a biproduct the time evolution of the chemical abundance gradient – never achieved in a model-independent way before. This was a step beyond the scope of the project.
Projektbezogene Publikationen (Auswahl)
- “A Radial Age Gradient in the Geometrically Thick Disk of the Milky Way”. 2016, ApJ 831, 139
Martig, M., Minchev, I., Ness, M., Fouesneau, M., Rix, H.-W.
(Siehe online unter https://doi.org/10.3847/0004-637X/831/2/139) - “Constraining the Milky Way assembly history with Galactic Archaeology. Ludwig Biermann Award Lecture 2015”. 2016, AN 337, 703
Minchev, I.
(Siehe online unter https://doi.org/10.1002/asna.201612366) - “Milky Way chemo-dynamics in the era of Gaia”. 2016, AN 337, 944
Minchev, I., Chiappini, C. and Martig, M.
(Siehe online unter https://doi.org/10.1002/asna.201612404) - “Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way's radial metallicity gradient”. 2017, A&A 600, 70
Anders, F., Chiappini, C., Minchev, I., Miglio, A., Montalbán, J., Mosser, B., Rodrigues, T. S., Santiago, B. X., Baudin, F., Beers, T. C., da Costa, L. N., García, R., García-Hernández, D. A., Holtzman, J., Maia, M. A., Majewski, S., Mathur, S., Noels-Grotsch, A., Pan, K., Schneider, D. P., Schultheis, M., Steinmetz, M., Valentini, M., Zamora, O.
(Siehe online unter https://doi.org/10.1051/0004-6361/201629363) - “The Relationship between Mono-abundance and Mono-age Stellar Populations in the Milky Way Disk”. 2017, ApJ 834, 27
Minchev, I., Steinmetz, M., Chiappini, C., Martig, M., Anders, F., Matijevic, G. and de Jong, R. S.
(Siehe online unter https://doi.org/10.3847/1538-4357/834/1/27) - “Estimating stellar birth radii and the time evolution of the Milky Way's ISM metallicity gradient”. 2018, MNRAS, 481, 1645
Minchev, I., Anders, F, Recio-Blanco, A., Chiappini, C., de Laverny, P., Queiroz, A., Steinmetz, S., Adibekyan, V., Carrillo, I., Cescutti, G., Guiglion, G., Hayden, M., de Jong, R., Kordopatis, G., Majewski, S., Martig, M., Santiago, B.
(Siehe online unter https://doi.org/10.1093/mnras/sty2033) - “Is the Milky Way still breathing? RAVE-Gaia streaming motions”. 2018, MNRAS 475, 2679
Carrillo, I., Minchev, I., Kordopatis, G., Steinmetz, M., Binney, J., Anders, F., Bienaymé, O., Bland-Hawthorn, J., Famaey, B., Freeman, K. C., Gilmore, G., Gibson, B. K., Grebel, E. K., Helmi, A., Just, A., Kunder, A., McMillan, P., Monari, G., Munari, U., Navarro, J., Parker, Q. A., Reid, W., Seabroke, G., Sharma, S., Siebert, A., Watson, F., Wojno, J., Wyse, R. F. G., Zwitter, T.
(Siehe online unter https://doi.org/10.1093/mnras/stx3342)
