Publications by James Binney


A fast algorithm for estimating actions in triaxial potentials

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447 (2015) 2479-2496

JL Sanders, J Binney


The rich are different: evidence from the RAVE survey for stellar radial migration

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447 (2015) 3526-3535

G Kordopatis, J Binney, G Gilmore, RFG Wyse, V Belolcurov, PJ McMillan, P Hatfield, EK Grebel, M Steinmetz, JF Navarro, G Seabroke, I Minchev, C Chiappini, O Bienayme, J Bland-Hawthorn, KC Freeman, BK Gibson, A Helmi, U Munari, Q Parker, WA Reid, A Siebert, A Siviero, T Zwitter


Action-based distribution functions for spheroidal galaxy components

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447 (2015) 3060-3068

L Posti, J Binney, C Nipoti, L Ciotti


Early flattening of dark matter cusps in dwarf spheroidal galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 446 (2015) 1820-1828

C Nipoti, J Binney


Galactic kinematics and dynamics from RAVE stars

Monthly Notices of the Royal Astronomical Society Blackwell Publishing Inc. (2014)

J Binney, B Burnett, G Kordopatis, M Steinmetz, G Gilmore, O Bienayme, J Bland-Hawthorn, B Famaey, EK Grebel, A Helmi, J Navarro, Q Parker, WA Reid, G Seabroke, F Watson, MEK Williams, RFG Wyse, T Zwitter

We analyse the kinematics of ~400000 RAVE stars. We split the sample into hot and cold dwarfs, red-clump and non-clump giants. The kinematics of the clump giants are consistent with being identical with those of non-clump giants. We fit Gaussian velocity ellipsoids to the meridional-plane components of velocity of each star class and give formulae from which the shape and orientation of the velocity ellipsoid can be determined at any location. The data are consistent with the giants and the cool dwarfs sharing the same velocity ellipsoids; sigma_z rises from 21 kms in the plane to sim 55 kms at |z|=2 kpc, while sigma_r rises from 37 kms to 82 kms. At (R,z) the longest axis of one of these velocity ellipsoids is inclined to the Galactic plane by an angle ~0.8 arctan(z/R). We use a novel formula to obtain precise fits to the highly non-Gaussian distributions of v_phi components. We compare the observed velocity distributions with the predictions of a dynamical model fitted to the velocities of stars that lie within ~150 pc of the Sun and star counts towards the Galactic pole. The model accurately reproduces the non-Gaussian nature of the v_r and v_z distributions and provides excellent fits to the data for v_z at all locations. The model v_phi distributions for the cool dwarfs fit the data extremely well, while those for the hot dwarfs have displacements to low v_phi that grow with |z| from very small values near the plane. At |z|>0.5 kpc, the theoretical v_phi distributions for giants show a deficit of stars with large v_phi and the model v_r distributions are too narrow. Systematically over-estimating distances by 20 per cent introduces asymmetry into the model v_r and v_z distributions near the plane and but significantly improves the fits to the data at |z|>0.5 kpc. The quality of the fits lends credence to the assumed, disc-dominated, gravitational potential.


New distances to RAVE stars

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 437 (2014) 351-370

J Binney, B Burnett, G Kordopatis, PJ McMillan, S Sharma, T Zwitter, O Bienaymé, J Bland-Hawthorn, M Steinmetz, G Gilmore, MEK Williams, J Navarro, EK Grebel, A Helmi, Q Parker, WA Reid, G Seabroke, F Watson, RFG Wyse


Self-consistent flattened isochrones

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 440 (2014) 787-798

J Binney


The Gaia-ESO Survey: processing FLAMES-UVES spectra

ASTRONOMY & ASTROPHYSICS 565 (2014) ARTN A113

GG Sacco, L Morbidelli, E Franciosini, E Majorca, S Randich, A Modigliani, G Gilmore, M Asplund, J Binney, P Bordfacio, J Drew, S Feltzing, A Ferguson, R Jeffries, G Micela, I Negueruela, T Prusti, H-W Rix, A Vallenari, E Alfaro, CA Prieto, C Babusiaux, T Bensby, R Blomme, A Bragaglia, E Flaccomio, P Francois, N Hambly, M Irwin, S Koposov, A Korn, A Lanzafame, F Pancino, A Recio-Blanco, R Smiljanic, S Van Eck, N Walton, M Bergemann, MT Costado, P de Laverny, U Heiter, V Hill, A Hourihane, R Jackson, P Jofre, J Lewis, K Lind, C Lardo, L Magrini, T Masseron, L Prisinzano, C Worley


Actions, angles and frequencies for numerically integrated orbits

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 441 (2014) 3284-3295

JL Sanders, J Binney


Interstellar medium. Pseudo-three-dimensional maps of the diffuse interstellar band at 862 nm.

Science (New York, N.Y.) 345 (2014) 791-795

J Kos, T Zwitter, R Wyse, O Bienaymé, J Binney, J Bland-Hawthorn, K Freeman, BK Gibson, G Gilmore, EK Grebel, A Helmi, G Kordopatis, U Munari, J Navarro, Q Parker, WA Reid, G Seabroke, S Sharma, A Siebert, A Siviero, M Steinmetz, FG Watson, MEK Williams

The diffuse interstellar bands (DIBs) are absorption lines observed in visual and near-infrared spectra of stars. Understanding their origin in the interstellar medium is one of the oldest problems in astronomical spectroscopy, as DIBs have been known since 1922. In a completely new approach to understanding DIBs, we combined information from nearly 500,000 stellar spectra obtained by the massive spectroscopic survey RAVE (Radial Velocity Experiment) to produce the first pseudo-three-dimensional map of the strength of the DIB at 8620 angstroms covering the nearest 3 kiloparsecs from the Sun, and show that it follows our independently constructed spatial distribution of extinction by interstellar dust along the Galactic plane. Despite having a similar distribution in the Galactic plane, the DIB 8620 carrier has a significantly larger vertical scale height than the dust. Even if one DIB may not represent the general DIB population, our observations outline the future direction of DIB research.


Constraining the Galaxy's dark halo with RAVE stars

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 445 (2014) 3133-3151

T Piffl, J Binney, PJ McMillan, M Steinmetz, A Helmi, RFG Wyse, O Bienayme, J Bland-Hawthorn, K Freeman, B Gibson, G Gilmore, EK Grebel, G Kordopatis, JF Navarro, Q Parker, WA Reid, G Seabroke, A Siebert, F Watson, T Zwitter


A NEW STELLAR CHEMO-KINEMATIC RELATION REVEALS THE MERGER HISTORY OF THE MILKY WAY DISK

ASTROPHYSICAL JOURNAL LETTERS 781 (2014) ARTN L20

I Minchev, C Chiappini, M Martig, M Steinmetz, RS de Jong, C Boeche, C Scannapieco, T Zwitter, RFG Wyse, JJ Binney, J Bland-Hawthorn, O Bienayme, B Famaey, KC Freeman, BK Gibson, EK Grebel, G Gilmore, A Helmi, G Kordopatis, YS Lee, U Munari, JF Navarro, QA Parker, AC Quillen, WA Reid, A Siebert, A Siviero, G Seabroke, F Watson, M Williams


KINEMATIC MODELING OF THE MILKY WAY USING THE RAVE AND GCS STELLAR SURVEYS

ASTROPHYSICAL JOURNAL 793 (2014) ARTN 51

S Sharma, J Bland-Hawthorn, J Binney, KC Freeman, M Steinmetz, C Boeche, O Bienayme, BK Gibson, GF Gilmore, EK Grebel, A Helmi, G Kordopatis, U Munari, JF Navarro, QA Parker, WA Reid, GM Seabroke, A Siebert, F Watson, MEK Williams, RFG Wyse, T Zwitter


The Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars

ASTRONOMY & ASTROPHYSICS 570 (2014) ARTN A122

R Smiljanic, AJ Korn, M Bergemann, A Frasca, L Magrini, T Masseron, E Pancino, G Ruchti, I San Roman, L Sbordone, SG Sousa, H Tabernero, G Tautvaisiene, M Valentini, M Weber, CC Worley, VZ Adibekyan, C Allende Prieto, G Barisevicius, K Biazzo, S Blanco-Cuaresma, P Bonifacio, A Bragaglia, E Caffau, T Cantat-Gaudin, Y Chorniy, P de Laverny, E Delgado-Mena, P Donati, S Duffau, E Franciosini, E Friel, D Geisler, JI Gonzalez Hernandez, P Gruyters, G Guiglion, CJ Hansen, U Heiter, V Hill, HR Jacobson, P Jofre, H Jonsson, AC Lanzafame, C Lardo, H-G Ludwig, E Maiorca, S Mikolaitis, D Montes, T Morel, A Mucciarelli, C Munoz, T Nordlander, L Pasquini, E Puzeras, A Recio-Blanco, N Ryde, G Sacco, NC Santos, AM Serenelli, R Sordo, C Soubiran, L Spina, M Steffen, A Vallenari, S Van Eck, S Villanova, G Gilmore, S Randich, M Asplund, J Binney, J Drew, S Feltzing, A Ferguson, R Jeffries, G Micela, I Negueruela, T Prusti, H-W Rix, E Alfaro, C Babusiaux, T Bensby, R Blomme, E Flaccomio, P Francois, M Irwin, S Koposov, N Walton, A Bayo, G Carraro, MT Costado, F Damiani, B Edvardsson, A Hourihane, R Jackson, J Lewis, K Lind, G Marconi, C Martayan, L Monaco, L Morbidelli, L Prisinzano, S Zaggia


Galactic kinematics and dynamics from Radial Velocity Experiment stars

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 439 (2014) 1231-1244

J Binney, B Burnett, G Kordopatis, M Steinmetz, G Gilmore, O Bienayme, J Bland-Hawthorn, B Famaey, EK Grebel, A Helmi, J Navarro, Q Parker, WA Reid, G Seabroke, A Siebert, F Watson, MEK Williams, RFG Wyse, T Zwitter


The RAVE survey: the Galactic escape speed and the mass of the Milky Way

ASTRONOMY & ASTROPHYSICS 562 (2014) ARTN A91

T Piffl, C Scannapieco, J Binney, M Steinmetz, R-D Scholz, MEK Williams, RS de Jong, G Kordopatis, G Matijevic, O Bienayme, J Bland-Hawthorn, C Boeche, K Freeman, B Gibson, G Gilmore, EK Grebel, A Helmi, U Munari, JF Navarro, Q Parker, WA Reid, G Seabroke, F Watson, RFG Wyse, T Zwitter


The radial velocity experiment (RAVE): Fourth data release

Astronomical Journal 146 (2013)

G Kordopatis, G Gilmore, M Steinmetz, C Boeche, GM Seabroke, A Siebert, T Zwitter, J Binney, P De Laverny, A Recio-Blanco, MEK Williams, T Piffl, H Enke, S Roeser, A Bijaoui, RFG Wyse, K Freeman, U Munari, I Carrillo, B Anguiano, D Burton, R Campbell, CJP Cass, K Fiegert, M Hartley, QA Parker, W Reid, A Ritter, KS Russell, M Stupar, FG Watson, O Bienaymé, J Bland-Hawthorn, O Gerhard, BK Gibson, EK Grebel, A Helmi, JF Navarro, C Conrad, B Famaey, C Faure, A Just, J Kos, G Matijevič, PJ McMillan, I Minchev, R Scholz, S Sharma, A Siviero, E Wylie De Boer, M Žerjal

We present the stellar atmospheric parameters (effective temperature, surface gravity, overall metallicity), radial velocities, individual abundances, and distances determined for 425,561 stars, which constitute the fourth public data release of the RAdial Velocity Experiment (RAVE). The stellar atmospheric parameters are computed using a new pipeline, based on the algorithms of MATISSE and DEGAS. The spectral degeneracies and the Two Micron All Sky Survey photometric information are now better taken into consideration, improving the parameter determination compared to the previous RAVE data releases. The individual abundances for six elements (magnesium, aluminum, silicon, titanium, iron, and nickel) are also given, based on a special-purpose pipeline that is also improved compared to that available for the RAVE DR3 and Chemical DR1 data releases. Together with photometric information and proper motions, these data can be retrieved from the RAVE collaboration Web site and the Vizier database. © 2013. The American Astronomical Society. All rights reserved.


Stream–orbit misalignment – II. A new algorithm to constrain the Galactic potential

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 433 (2013) 1826-1836

JL Sanders, J Binney


The wobbly Galaxy: Kinematics north and south with RAVE red-clump giants

Monthly Notices of the Royal Astronomical Society 436 (2013) 101-121

MEK Williams, M Steinmetz, J Binney, A Siebert, H Enke, B Famaey, I Minchev, RS de Jong, C Boeche, KC Freeman, O Bienaymé, J Bland-Hawthorn, BK Gibson, GF Gilmore, EK Grebel, A Helmi, G Kordopatis, U Munari, JF Navarro, QA Parker, W Reid, GM Seabroke, S Sharma, A Siviero, FG Watson, RFG Wyse, T Zwitter

TheRAdialVelocity Experiment survey, combined with proper motions and distance estimates, can be used to study in detail stellar kinematics in the extended solar neighbourhood (solar suburb). Using 72 365 red-clump stars, we examine the mean velocity components in 3D between 6 < R < 10 kpc and -2 < Z < 2 kpc, concentrating on north-south differences. Simple parametric fits to the (R, Z) trends for Vφ and the velocity dispersions are presented. We confirm the recently discovered gradient in mean Galactocentric radial velocity, VR, finding that the gradient is marked below the plane (δ(VR)/δR=-8 kms-1 kpc-1 for Z<0, vanishing to zero above the plane), with a Z gradient thus also present. The vertical velocity, VZ, also shows clear, large-amplitude (|VZ| = 17 km s-1) structure, with indications of a rarefaction- compression pattern, suggestive of wave-like behaviour. We perform a rigorous error analysis, tracing sources of both systematic and random errors. We confirm the north-south differences in VR and VZ along the line of sight, with the VR estimated independent of the proper motions. The complex three-dimensional structure of velocity space presents challenges for future modelling of the Galactic disc, with the Galactic bar, spiral arms and excitation of wave-like structures all probably playing a role. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.


DIFFUSE INTERSTELLAR BAND AT 8620 angstrom IN RAVE: A NEW METHOD FOR DETECTING THE DIFFUSE INTERSTELLAR BAND IN SPECTRA OF COOL STAR

ASTROPHYSICAL JOURNAL 778 (2013) ARTN 86

J Kos, T Zwitter, EK Grebel, O Bienayme, J Binney, J Bland-Hawthorn, KC Freeman, BK Gibson, G Gilmore, G Kordopatis, JF Navarro, Q Parker, WA Reid, G Seabroke, A Siebert, A Siviero, M Steinmetz, F Watson, RFG Wyse

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