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Correlations betwee...
Correlations between age, kinematics, and chemistry as seen by the RAVE survey
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- Wojno, Jennifer (författare)
- Leibniz Institute for Astrophysics Potsdam (AIP),Johns Hopkins University
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- Kordopatis, Georges (författare)
- Côte d'Azur Observatory
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- Steinmetz, Matthias (författare)
- Leibniz Institute for Astrophysics Potsdam (AIP)
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- McMillan, Paul (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
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- Binney, James (författare)
- University of Oxford
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- Famaey, Benoit (författare)
- University of Strasbourg
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- Monari, Giacomo (författare)
- Leibniz Institute for Astrophysics Potsdam (AIP)
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- Minchev, Ivan (författare)
- Leibniz Institute for Astrophysics Potsdam (AIP)
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- Wyse, Rosemary F.G. (författare)
- Johns Hopkins University
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- Antoja, Teresa (författare)
- University of Barcelona
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- Siebert, Arnaud (författare)
- University of Strasbourg
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- Carrillo, Ismael (författare)
- Leibniz Institute for Astrophysics Potsdam (AIP)
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- Bland-Hawthorn, Joss (författare)
- University of Sydney
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- Grebel, Eva K. (författare)
- Heidelberg University
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- Zwitter, Tomaž (författare)
- University of Ljubljana
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- Bienaymé, Olivier (författare)
- University of Strasbourg
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- Gibson, Brad (författare)
- University of Hull
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- Kunder, Andrea (författare)
- Saint Martin's University
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- Munari, Ulisse (författare)
- INAF - Osservatorio Astronomico di Padova
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- Navarro, Julio (författare)
- University of Victoria
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- Parker, Quentin (författare)
- University of Hong Kong
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- Reid, Warren (författare)
- Western Sydney University,Macquarie University, Sydney
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- Seabroke, George (författare)
- University College London
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(creator_code:org_t)
- 2018-04-24
- 2018
- Engelska 13 s.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 477:4, s. 5612-5624
- Relaterad länk:
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http://dx.doi.org/10...
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https://academic.oup...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We explore the connections between stellar age, chemistry, and kinematics across a Galactocentric distance of 7.5 < R(kpc) < 9.0, using a sample of ~12 000 intermediate-mass (FGK) turn-offstars observed with the RAdial Velocity Experiment (RAVE) survey. The kinematics of this sample are determined using radial velocity measurements from RAVE, and parallax and proper motion measurements from the Tycho-Gaia Astrometric Solution (TGAS). In addition, ages for RAVE stars are determined using a Bayesian method, taking TGAS parallaxes as a prior. We divide our sample into young (0 < τ < 3 Gyr) and old (8 < τ < 13 Gyr) populations, and then consider different metallicity bins for each of these age groups. We find significant differences in kinematic trends of young and old, metal-poor and metal-rich, stellar populations. In particular, we find a strong metallicity dependence in the mean Galactocentric radial velocity as a function of radius (∂V R /∂R) for young stars, with metal-rich stars having a much steeper gradient than metal-poor stars. For ∂V Φ /∂R, young, metal-rich stars significantly lag the LSR with a slightly positive gradient, while metal-poor stars show a negative gradient above the LSR. We interpret these findings as correlations between metallicity and the relative contributions of the non-axisymmetries in the Galactic gravitational potential (the spiral arms and the bar) to perturb stellar orbits.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Galaxy: kinematics and dynamics
- Galaxy: structure
- Solar neighbourhood
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- ref (ämneskategori)
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Wojno, Jennifer
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Kordopatis, Geor ...
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Steinmetz, Matth ...
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McMillan, Paul
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Binney, James
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Famaey, Benoit
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visa fler...
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Monari, Giacomo
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Minchev, Ivan
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Wyse, Rosemary F ...
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Antoja, Teresa
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Siebert, Arnaud
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Carrillo, Ismael
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Bland-Hawthorn, ...
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Grebel, Eva K.
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Zwitter, Tomaž
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Bienaymé, Olivie ...
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Gibson, Brad
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Kunder, Andrea
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Munari, Ulisse
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Navarro, Julio
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Parker, Quentin
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Reid, Warren
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Seabroke, George
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visa färre...
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