Chemical separation of disc components using RAVE

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Chemical separation of disc components using RAVE. / 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; Bienaym-e, Olivier; Gibson, Brad K.; Zwitter, Tomaz; Bland-Hawthorn, Joss; Navarro, Julio F.; Parker, Quentin A.; Reid, Warren; Seabroke, George; Watson, Fred.

I: Monthly Notices of the Royal Astronomical Society, Vol. 461, Nr. 4, 01.10.2016, s. 4246-4255.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

Wojno, J, Kordopatis, G, Steinmetz, M, McMillan, P, Matijevic, G, Binney, J, Wyse, RFG, Boeche, C, Just, A, Grebel, EK, Siebert, A, Bienaym-e, O, Gibson, BK, Zwitter, T, Bland-Hawthorn, J, Navarro, JF, Parker, QA, Reid, W, Seabroke, G & Watson, F 2016, 'Chemical separation of disc components using RAVE', Monthly Notices of the Royal Astronomical Society, vol. 461, nr. 4, s. 4246-4255. https://doi.org/10.1093/mnras/stw1633

APA

Wojno, J., Kordopatis, G., Steinmetz, M., McMillan, P., Matijevic, G., Binney, J., ... Watson, F. (2016). Chemical separation of disc components using RAVE. Monthly Notices of the Royal Astronomical Society, 461(4), 4246-4255. https://doi.org/10.1093/mnras/stw1633

CBE

Wojno J, Kordopatis G, Steinmetz M, McMillan P, Matijevic G, Binney J, Wyse RFG, Boeche C, Just A, Grebel EK, Siebert A, Bienaym-e O, Gibson BK, Zwitter T, Bland-Hawthorn J, Navarro JF, Parker QA, Reid W, Seabroke G, Watson F. 2016. Chemical separation of disc components using RAVE. Monthly Notices of the Royal Astronomical Society. 461(4):4246-4255. https://doi.org/10.1093/mnras/stw1633

MLA

Vancouver

Wojno J, Kordopatis G, Steinmetz M, McMillan P, Matijevic G, Binney J et al. Chemical separation of disc components using RAVE. Monthly Notices of the Royal Astronomical Society. 2016 okt 1;461(4):4246-4255. https://doi.org/10.1093/mnras/stw1633

Author

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 ; Bienaym-e, Olivier ; Gibson, Brad K. ; Zwitter, Tomaz ; Bland-Hawthorn, Joss ; Navarro, Julio F. ; Parker, Quentin A. ; Reid, Warren ; Seabroke, George ; Watson, Fred. / Chemical separation of disc components using RAVE. I: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 461, Nr. 4. s. 4246-4255.

RIS

TY - JOUR

T1 - Chemical separation of disc components using RAVE

AU - Wojno, Jennifer

AU - Kordopatis, Georges

AU - Steinmetz, Matthias

AU - McMillan, Paul

AU - Matijevic, Gal

AU - Binney, James

AU - Wyse, Rosemary F G

AU - Boeche, Corrado

AU - Just, Andreas

AU - Grebel, Eva K.

AU - Siebert, Arnaud

AU - Bienaym-e, Olivier

AU - Gibson, Brad K.

AU - Zwitter, Tomaz

AU - Bland-Hawthorn, Joss

AU - Navarro, Julio F.

AU - Parker, Quentin A.

AU - Reid, Warren

AU - Seabroke, George

AU - Watson, Fred

PY - 2016/10/1

Y1 - 2016/10/1

N2 - We present evidence from the RAdial Velocity Experiment (RAVE) survey of chemically separated, kinematically distinct disc components in the solar neighbourhood.We apply probabilistic chemical selection criteria to separate our sample into a-low ('thin disc') and a-high ('thick disc') sequences. Using newly derived distances,which will be utilized in the upcoming RAVE DR5, we explore the kinematic trends as a function of metallicity for each of the disc components. For our a-low disc, we find a negative trend in the mean rotational velocity (Vf) as a function of iron abundance ([Fe/H]). We measure a positive gradient ∂Vφ/∂[Fe/H] for the a-high disc, consistent with results from high-resolution surveys.We also find differences between the a-low and a-high discs in all three components of velocity dispersion.We discuss the implications of an a-low, metal-rich population originating from the inner Galaxy, where the orbits of these stars have been significantly altered by radial mixing mechanisms in order to bring them into the solar neighbourhood. The probabilistic separation we propose can be extended to other data sets for which the accuracy in [a/Fe] is not sufficient to disentangle the chemical disc components a priori. For such data sets which will also have significant overlap with Gaia DR1, we can therefore make full use of the improved parallax and proper motion data as it becomes available to investigate kinematic trends in these chemical disc components.

AB - We present evidence from the RAdial Velocity Experiment (RAVE) survey of chemically separated, kinematically distinct disc components in the solar neighbourhood.We apply probabilistic chemical selection criteria to separate our sample into a-low ('thin disc') and a-high ('thick disc') sequences. Using newly derived distances,which will be utilized in the upcoming RAVE DR5, we explore the kinematic trends as a function of metallicity for each of the disc components. For our a-low disc, we find a negative trend in the mean rotational velocity (Vf) as a function of iron abundance ([Fe/H]). We measure a positive gradient ∂Vφ/∂[Fe/H] for the a-high disc, consistent with results from high-resolution surveys.We also find differences between the a-low and a-high discs in all three components of velocity dispersion.We discuss the implications of an a-low, metal-rich population originating from the inner Galaxy, where the orbits of these stars have been significantly altered by radial mixing mechanisms in order to bring them into the solar neighbourhood. The probabilistic separation we propose can be extended to other data sets for which the accuracy in [a/Fe] is not sufficient to disentangle the chemical disc components a priori. For such data sets which will also have significant overlap with Gaia DR1, we can therefore make full use of the improved parallax and proper motion data as it becomes available to investigate kinematic trends in these chemical disc components.

KW - Galaxy: abundances

KW - Galaxy: disc

KW - Galaxy: evolution

KW - Galaxy: kinematics and dynamics

KW - Galaxy: structure

UR - http://www.scopus.com/inward/record.url?scp=84988615457&partnerID=8YFLogxK

U2 - 10.1093/mnras/stw1633

DO - 10.1093/mnras/stw1633

M3 - Article

VL - 461

SP - 4246

EP - 4255

JO - Monthly Notices of the Royal Astronomical Society

T2 - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 1365-2966

IS - 4

ER -