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Constraints on thin and thick disc formation from new analysis of 2MASS and SDSS surveys

Published online by Cambridge University Press:  17 July 2015

A.C. Robin ,
C. Reylé ,
E.B. Amôres  and
A.M.M. Martins
A.C. Robin
Affiliation:
Institut Utinam, CNRS UMR 6213, Université de Franche-Comté, OSU THETA Franche-Comté-Bourgogne, France
C. Reylé
Affiliation:
Institut Utinam, CNRS UMR 6213, Université de Franche-Comté, OSU THETA Franche-Comté-Bourgogne, France
E.B. Amôres
Affiliation:
UEFS, Departamento de Física, Novo Horizonte, Feira de Santana, Brazil
A.M.M. Martins
Affiliation:
Institut Utinam, CNRS UMR 6213, Université de Franche-Comté, OSU THETA Franche-Comté-Bourgogne, France
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Abstract

Two new analysis of SDSS and 2MASS surveys are used to constrain the characteristics of the thin and thick disc of the Milky Way, based on a population synthesis model and a MCMC scheme to constrain model parameters. These studies show that 1) the thick disc has been formed during an extended period of time and it was contracting during this phase; 2) the external thin disc is shown to have characteristics which vary with age such as the scale length, warp orientation, warp and flare slopes. The thick disc undergoing a contraction with time while the thin disc forming inside-out clearly indicate that they are truly distinct components of the Galaxy.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 68: The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases , 2014 , pp. 199 - 203
Copyright
© EAS, EDP Sciences, 2015

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References

Bovy, J., Rix, H.W., Liu, C., et al., 2012, ApJ, 753, 148CrossRef
Bournaud, F., Elmegreen, B.G., & Martig, M., 2009, ApJ, 707, L1CrossRef
Charbonneau, P., 1995, ApJS, 101, 309CrossRef
de Jong, J.T.A., Yanny, B., Rix, H.W., et al., 2010, ApJ, 714, 663CrossRef
Lehnert, M.D., Di Matteo, P., Haywood, M., & Snaith, O.N., 2014, ApJ, 789, L30CrossRef
Minchev, I., Famaey, B., Quillen, A.C., et al., 2012, A&A, 548, A127
Robin, A., & Crézé, M., 1986, A&A, 157, 71PubMed
Robin, A.C., Reylé, C., Derrière, S., & Picaud, S., 2003, A&A, 409, 523, A106
Robin, A.C., Reylé, C., Fliri, J., et al., 2014, A&A, 569, AA13
Roskar, R., Debattista, V.P., & Loebman, S.R., 2013, MNRAS, 433, 976CrossRef
Snaith, O., Haywood, M., Di Matteo, P., et al., 2014, ApJ, 781, L31CrossRef