Ruprecht-Karls-Universität Heidelberg
Subproject A5: Observational Galactic Chemodynamics

Subproject A5: Observational Galactic Chemodynamics

Eva K. Grebel (ARI), Maria Bergemann (MPIA)

The RAdial Velocity Experiment (RAVE), which concluded its decade-long observations during the first funding period after having obtained around half a million stellar spectra, was our primary data source. Numerous papers on RAVE results were published during the last four years, assisted by the abundance analyses done in subproject A5. Our findings include the detection of kinematic asymmetries in the local disk and improved determinations of the local standard of rest. Most of the kinematic star groups found in RAVE were shown to be dynamical effects of the Galactic bar and spiral arms; only a few appear to be genuine remnants of accretion events. Chemical gradients and orbit estimates suggest that radial migration is unlikely to have been the main cause for the formation of the thick disk. Gas-rich mergers and subsequent in-situ star formation appear to be a more likely culprit. A general-purpose automated spectroscopic abundance analysis code (“SPACE”) was developed, which we plan to release in the second funding period. Considerable effort was spent also on the abundance analysis of spectra from the Gaia-ESO Survey, in which the members of subproject A5 participate. The results will be released to the public by the Gaia-ESO collaboration.

In the second funding period, we want to explore the chemodynamical evolution of the Galactic disk combining data mainly from RAVE, the Gaia-ESO Survey, and Gaia. Using 6-D phase-space information, abundances, and ages we can study vertical and radial chemical gradients in the disk as a function of spatial position, kinematics, and approximate age. We will study age-metallicity and age-metallicity-velocity dispersion relations throughout the sampled disk volumes and use the results in collaboration with A6 to constrain disk formation scenarios. Methodologically, we will develop a code that makes it possible to combine spectroscopic data, multi-color photometry, and parallaxes from different surveys and to exploit all of them in a homogeneous way. This will be accompanied by the development of 1-D and 3-D NLTE codes for abundance determinations.


Casey, Andrew R.; Hawkins, Keith; Hogg, David W.; Ness, Melissa; Rix, Hans-Walter; Kordopatis, Georges; Kunder, Andrea; Steinmetz, Matthias; Koposov, Sergey; Enke, Harry; Sanders, Jason; Gilmore, Gerry; Zwitter, Tomaz; Freeman, Kenneth C.; Casagrande, Luca; Matijevic, Gal; Seabroke, George; Bienaymé, Olivier; Bland-Hawthorn, Joss; Gibson, Brad K.; Grebel, Eva K.; Helmi, Amina; Munari, Ulisse; Navarro, Julio F.; Reid, Warren; Siebert, Arnaud; Wyse, Rosemary
05/2017 ApJ 840, 59

Pilyugin, L. S.; Grebel, E. K.; Zinchenko, I. A.; Nefedyev, Y. A.; Mattsson, L.
02/2017 MNRAS 465, 1358

Wojno, Jennifer; Kordopatis, Georges; Steinmetz, Matthias; McMillan, Paul; Matijevic, Gal; Binney, James; Wyse, Rosemary F. G.; Boeche, Corrado; Just, Andreas; Grebel, Eva K.; Siebert, Arnaud; Bienaymé, Olivier; Gibson, Brad K.; Zwitter, Tomaz; Bland-Hawthorn, Joss; Navarro, Julio F.; Parker, Quentin A.; Reid, Warren; Seabroke, George; Watson, Fred
10/2016 MNRAS 461, 4246

Pilyugin, L. S.; Grebel, E. K.
04/2016 MNRAS 457, 3678

Anguiano, B.; De Silva, G. M.; Freeman, K.; Da Costa, G. S.; Zwitter, T.; Quillen, A. C.; Zucker, D. B.; Navarro, J. F.; Kunder, A.; Siebert, A.; Wyse, R. F. G.; Grebel, E. K.; Kordopatis, G.; Gibson, B. K.; Seabroke, G.; Sharma, S.; Wojno, J.; Bland-Hawthorn, J.; Parker, Q. A.; Steinmetz, M.; Boeche, C.; Gilmore, G.; Bienaymé, O.; Reid, W.; Watson, F.
04/2016 MNRAS 457, 2078

Thygesen, A. O.; Sbordone, L.; Ludwig, H.-G.; Ventura, P.; Yong, D.; Collet, R.; Christlieb, N.; Melendez, J.; Zaggia, S.
04/2016 A&A 588, A66

Hansen, C. J.; Nordström, B.; Hansen, T. T.; Kennedy, C. R.; Placco, V. M.; Beers, T. C.; Andersen, J.; Cescutti, G.; Chiappini, C.
04/2016 A&A 588, A37

Hansen, T. T.; Andersen, J.; Nordström, B.; Beers, T. C.; Placco, V. M.; Yoon, J.; Buchhave, L. A.
04/2016 A&A 588, A3

Boeche, C.; Grebel, E. K.
03/2016 A&A 587, A2

Klevas, J.; Kucinskas, A.; Steffen, M.; Caffau, E.; Ludwig, H.-G.
02/2016 A&A 586, A156

Hendricks, Benjamin; Boeche, Corrado; Johnson, Christian I.; Frank, Matthias J.; Koch, Andreas; Mateo, Mario; Bailey, John I.
01/2016 A&A 585, A86

Hansen, C. J.; Ludwig, H.-G.; Seifert, W.; Koch, A.; Xu, W.; Caffau, E.; Christlieb, N.; Korn, A. J.; Lind, K.; Sbordone, L.; Ruchti, G.; Feltzing, S.; de Jong, R. S.; Barden, S.
09/2015 AN 336, 665

Anguiano, B.; Zucker, D. B.; Scholz, R.-D.; Grebel, E. K.; Seabroke, G.; Kunder, A.; Binney, J.; McMillan, P. J.; Zwitter, T.; Wyse, R. F. G.; Kordopatis, G.; Bienaymé, O.; Bland-Hawthorn, J.; Boeche, C.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Munari, U.; Navarro, J.; Parker, Q.; Reid, W.; Siebert, A.; Siviero, A.; Steinmetz, M.; Watson, F.
08/2015 MNRAS 451, 1229

Cordero, M. J.; Hansen, C. J.; Johnson, C. I.; Pilachowski, C. A.
07/2015 ApJ 808, L10

Kunder, Andrea; Rich, R. M.; Hawkins, K.; Poleski, R.; Storm, J.; Johnson, C. I.; Shen, J.; Li, Z.-Y.; Cordero, M. J.; Nataf, D. M.; Bono, G.; Walker, A. R.; Koch, A.; De Propris, R.; Udalski, A.; Szymanski, M. K.; Soszynski, I.; Pietrzynski, G.; Ulaczyk, K.; Wyrzykowski, L.; Pietrukowicz, P.; Skowron, J.; Kozlowski, S.; Mróz, P.
07/2015 ApJ 808, L12

Bonifacio, P.; Caffau, E.; Spite, M.; Limongi, M.; Chieffi, A.; Klessen, R. S.; François, P.; Molaro, P.; Ludwig, H.-G.; Zaggia, S.; Spite, F.; Plez, B.; Cayrel, R.; Christlieb, N.; Clark, P. C.; Glover, S. C. O.; Hammer, F.; Koch, A.; Monaco, L.; Sbordone, L.; Steffen, M.
07/2015 A&A 579, A28

Zinchenko, Igor A.; Berczik, Peter; Grebel, Eva K.; Pilyugin, Leonid S.; Just, Andreas
06/2015 ApJ 806, 267

Dobrovolskas, V.; Kucinskas, A.; Bonifacio, P.; Caffau, E.; Ludwig, H.-G.; Steffen, M.; Spite, M.
04/2015 A&A 576, A128

Kordopatis, G.; Binney, J.; Gilmore, G.; Wyse, R. F. G.; Belokurov, V.; McMillan, P. J.; Hatfield, P.; Grebel, E. K.; Steinmetz, M.; Navarro, J. F.; Seabroke, G.; Minchev, I.; Chiappini, C.; Bienaymé, O.; Bland-Hawthorn, J.; Freeman, K. C.; Gibson, B. K.; Helmi, A.; Munari, U.; Parker, Q.; Reid, W. A.; Siebert, A.; Siviero, A.; Zwitter, T.
03/2015 MNRAS 447, 3526

Tremblay, P.-E.; Ludwig, H.-G.; Freytag, B.; Fontaine, G.; Steffen, M.; Brassard, P.
02/2015 ApJ 799, 142

Cordero, M. J.; Pilachowski, C. A.; Johnson, C. I.; Vesperini, E.
02/2015 ApJ 800, 3

Hawkins, K.; Kordopatis, G.; Gilmore, G.; Masseron, T.; Wyse, R. F. G.; Ruchti, G.; Bienaymé, O.; Bland-Hawthorn, J.; Boeche, C.; Freeman, K.; Gibson, B. K.; Grebel, E. K.; Helmi, A.; Kunder, A.; Munari, U.; Navarro, J. F.; Parker, Q. A.; Reid, W. A.; Scholz, R. D.; Seabroke, G.; Siebert, A.; Steinmetz, M.; Watson, F.; Zwitter, T.
02/2015 MNRAS 447, 2046

Johnson, Christian I.; McDonald, Iain; Pilachowski, Catherine A.; Mateo, Mario; Bailey, John I., III; Cordero, Maria J.; Zijlstra, Albert A.; Crane, Jeffrey D.; Olszewski, Edward; Shectman, Stephen A.; Thompson, Ian
02/2015 AJ 149, 71

Puspitarini, L.; Lallement, R.; Babusiaux, C.; Chen, H.-C.; Bonifacio, P.; Sbordone, L.; Caffau, E.; Duffau, S.; Hill, V.; Monreal-Ibero, A.; Royer, F.; Arenou, F.; Peralta, R.; Drew, J. E.; Bonito, R.; Lopez-Santiago, J.; Alfaro, E. J.; Bensby, T.; Bragaglia, A.; Flaccomio, E.; Lanzafame, A. C.; Pancino, E.; Recio-Blanco, A.; Smiljanic, R.; Costado, M. T.; Lardo, C.; de Laverny, P.; Zwitter, T.
01/2015 A&A 573, A35

Editor: T. Lisker
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