Improved distances and ages for stars common to TGAS and RAVE

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Standard

Improved distances and ages for stars common to TGAS and RAVE. / McMillan, Paul J.; Kordopatis, Georges; Kunder, Andrea; Binney, James; Wojno, Jennifer; Zwitter, Tomaž; Steinmetz, Matthias; Bland-Hawthorn, Joss; Gibson, Brad K.; Gilmore, Gerard; Grebel, Eva K.; Helmi, Amina; Munari, Ulisse; Navarro, Julio F.; Parker, Quentin A.; Seabroke, George; Watson, Fred; Wyse, Rosemary F.G.

I: Monthly Notices of the Royal Astronomical Society, Vol. 477, Nr. 4, 11.07.2018, s. 5279-5300.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

McMillan, PJ, Kordopatis, G, Kunder, A, Binney, J, Wojno, J, Zwitter, T, Steinmetz, M, Bland-Hawthorn, J, Gibson, BK, Gilmore, G, Grebel, EK, Helmi, A, Munari, U, Navarro, JF, Parker, QA, Seabroke, G, Watson, F & Wyse, RFG 2018, 'Improved distances and ages for stars common to TGAS and RAVE', Monthly Notices of the Royal Astronomical Society, vol. 477, nr. 4, s. 5279-5300. https://doi.org/10.1093/MNRAS/STY990

APA

McMillan, P. J., Kordopatis, G., Kunder, A., Binney, J., Wojno, J., Zwitter, T., ... Wyse, R. F. G. (2018). Improved distances and ages for stars common to TGAS and RAVE. Monthly Notices of the Royal Astronomical Society, 477(4), 5279-5300. https://doi.org/10.1093/MNRAS/STY990

CBE

McMillan PJ, Kordopatis G, Kunder A, Binney J, Wojno J, Zwitter T, Steinmetz M, Bland-Hawthorn J, Gibson BK, Gilmore G, Grebel EK, Helmi A, Munari U, Navarro JF, Parker QA, Seabroke G, Watson F, Wyse RFG. 2018. Improved distances and ages for stars common to TGAS and RAVE. Monthly Notices of the Royal Astronomical Society. 477(4):5279-5300. https://doi.org/10.1093/MNRAS/STY990

MLA

Vancouver

Author

McMillan, Paul J. ; Kordopatis, Georges ; Kunder, Andrea ; Binney, James ; Wojno, Jennifer ; Zwitter, Tomaž ; Steinmetz, Matthias ; Bland-Hawthorn, Joss ; Gibson, Brad K. ; Gilmore, Gerard ; Grebel, Eva K. ; Helmi, Amina ; Munari, Ulisse ; Navarro, Julio F. ; Parker, Quentin A. ; Seabroke, George ; Watson, Fred ; Wyse, Rosemary F.G. / Improved distances and ages for stars common to TGAS and RAVE. I: Monthly Notices of the Royal Astronomical Society. 2018 ; Vol. 477, Nr. 4. s. 5279-5300.

RIS

TY - JOUR

T1 - Improved distances and ages for stars common to TGAS and RAVE

AU - McMillan, Paul J.

AU - Kordopatis, Georges

AU - Kunder, Andrea

AU - Binney, James

AU - Wojno, Jennifer

AU - Zwitter, Tomaž

AU - Steinmetz, Matthias

AU - Bland-Hawthorn, Joss

AU - Gibson, Brad K.

AU - Gilmore, Gerard

AU - Grebel, Eva K.

AU - Helmi, Amina

AU - Munari, Ulisse

AU - Navarro, Julio F.

AU - Parker, Quentin A.

AU - Seabroke, George

AU - Watson, Fred

AU - Wyse, Rosemary F.G.

PY - 2018/7/11

Y1 - 2018/7/11

N2 - We combine parallaxes from the first Gaia data release with the spectrophotometric distance estimation framework for stars in the fifth RAVE survey data release. The combined distance estimates aremore accurate than either determination in isolation - uncertainties are on average two times smaller than for RAVE-only distances (three times smaller for dwarfs), and 1.4 times smaller than TGAS parallax uncertainties (two times smaller for giants). We are also able to compare the estimates from spectrophotometry to those from Gaia, and use this to assess the reliability of both catalogues and improve our distance estimates. We find that the distances to the lowest log g stars are, on average, overestimated and caution that they may not be reliable. We also find that it is likely that the Gaia random uncertainties are smaller than the reported values. As a by-product we derive ages for the RAVE stars, many with relative uncertainties less than 20 per cent. These results for 219 566 RAVE sources have been made publicly available, and we encourage their use for studies that combine the radial velocities provided by RAVE with the proper motions provided by Gaia. A sample that we believe to be reliable can be found by taking only the stars with the flag notification 'flag_any=0'.

AB - We combine parallaxes from the first Gaia data release with the spectrophotometric distance estimation framework for stars in the fifth RAVE survey data release. The combined distance estimates aremore accurate than either determination in isolation - uncertainties are on average two times smaller than for RAVE-only distances (three times smaller for dwarfs), and 1.4 times smaller than TGAS parallax uncertainties (two times smaller for giants). We are also able to compare the estimates from spectrophotometry to those from Gaia, and use this to assess the reliability of both catalogues and improve our distance estimates. We find that the distances to the lowest log g stars are, on average, overestimated and caution that they may not be reliable. We also find that it is likely that the Gaia random uncertainties are smaller than the reported values. As a by-product we derive ages for the RAVE stars, many with relative uncertainties less than 20 per cent. These results for 219 566 RAVE sources have been made publicly available, and we encourage their use for studies that combine the radial velocities provided by RAVE with the proper motions provided by Gaia. A sample that we believe to be reliable can be found by taking only the stars with the flag notification 'flag_any=0'.

KW - Galaxy: fundamental parameters

KW - Galaxy: kinematics and dynamics

KW - Galaxy: structure

KW - Methods: statistical

U2 - 10.1093/MNRAS/STY990

DO - 10.1093/MNRAS/STY990

M3 - Article

VL - 477

SP - 5279

EP - 5300

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 -