All Outputs (116)

Weighing the local dark matter with RAVE red clump stars (2014)
Journal Article
Bienaymé, O., Famaey, B., Siebert, A., Freeman, K. C., Gibson, B. K., Gilmore, G., Grebel, E. K., Bland-Hawthorn, J., Kordopatis, G., Munari, U., Navarro, J. F., Parker, Q., Reid, W., Seabroke, G. M., Siviero, A., Steinmetz, M., Watson, F., Wyse, R. F. G., & Zwitter, T. (2014). Weighing the local dark matter with RAVE red clump stars. Astronomy and Astrophysics, 571, A92. https://doi.org/10.1051/0004-6361/201424478

We determine the Galactic potential in the solar neigbourhood from RAVE observations. We select red clump stars for which accurate distances, radial velocities, and metallicities have been measured. Combined with data from the 2MASS and UCAC catalogu... Read More about Weighing the local dark matter with RAVE red clump stars.

Constraining the Galaxy's dark halo with RAVE stars (2014)
Journal Article
Piffl, T., Binney, J., McMillan, P. J., Steinmetz, M., Helmi, A., Wyse, R. F. G., Bienaymé, O., Bland-Hawthorn, J., Freeman, K., Gibson, B., Gilmore, G., Grebel, E. K., Kordopatis, G., Navarro, J. F., Parker, Q., Reid, W. A., Seabroke, G., Siebert, A., Watson, F., & Zwitter, T. (2014). Constraining the Galaxy's dark halo with RAVE stars. Monthly notices of the Royal Astronomical Society, 445(3), 3133-3151. https://doi.org/10.1093/mnras/stu1948

© 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We use the kinematics of ~200 000 giant stars that lie within ~1.5 kpc of the plane to measure the vertical profile of mass density near the Sun. We... Read More about Constraining the Galaxy's dark halo with RAVE stars.

APASS Landolt-Sloan BVgri photometry of RAVE stars. I. Data, effective temperatures, and reddenings (2014)
Journal Article
Munari, U., Henden, A., Frigo, A., Zwitter, T., Bienaymé, O., Bland-Hawthorn, J., Boeche, C., Freeman, K. C., Gibson, B. K., Gilmore, G., Grebel, E. K., Helmi, A., Kordopatis, G., Levine, S. E., Navarro, J. F., Parker, Q. A., Reid, W., Seabroke, G. M., Siebert, A., Siviero, A., …Williams, M. (2014). APASS Landolt-Sloan BVgri photometry of RAVE stars. I. Data, effective temperatures, and reddenings. Astronomical Journal, 148(5), 81. https://doi.org/10.1088/0004-6256/148/5/81

© 2014. The American Astronomical Society. All rights reserved. We provide AAVSO Photometric All-Sky Survey (APASS) photometry in the Landolt BV and Sloan g′r′i′ bands for all 425,743 stars included in the fourth RAVE Data Release. The internal accur... Read More about APASS Landolt-Sloan BVgri photometry of RAVE stars. I. Data, effective temperatures, and reddenings.

Chemodynamics of a simulated disc galaxy: Initial mass functions and Type Ia supernova progenitors (2014)
Journal Article
Few, C. G., Courty, S., Gibson, B. K., Michel-Dansac, L., & Calura, F. (2014). Chemodynamics of a simulated disc galaxy: Initial mass functions and Type Ia supernova progenitors. Monthly notices of the Royal Astronomical Society, 444(4), 3845-3862. https://doi.org/10.1093/mnras/stu1709

We trace the formation and advection of several elements within a cosmological adaptive mesh refinement simulation of an L⋆ galaxy. We use nine realizations of the same initial conditions with different stellar initial mass functions (IMFs), mass lim... Read More about Chemodynamics of a simulated disc galaxy: Initial mass functions and Type Ia supernova progenitors.

Kinematic modeling of the milky way using the rave and GCS stellar surveys (2014)
Journal Article
Sharma, S., Bland-Hawthorn, J., Binney, J., Freeman, K. C., Steinmetz, M., Boeche, C., Bienaymé, O., Gibson, B. K., Gilmore, G. F., Grebel, E. K., Helmi, A., Kordopatis, G., Munari, U., Navarro, J. F., Parker, Q. A., Reid, W. A., Seabroke, G. M., Siebert, A., Watson, F., Williams, M. E. K., …Zwitter, T. (2014). Kinematic modeling of the milky way using the rave and GCS stellar surveys. The Astrophysical journal, 793(1), 51. https://doi.org/10.1088/0004-637x/793/1/51

© 2014. The American Astronomical Society. All rights reserved.. We investigate the kinematic parameters of the Milky Way disk using the Radial Velocity Experiment (RAVE) and Geneva-Copenhagen Survey (GCS) stellar surveys. We do this by fitting a kin... Read More about Kinematic modeling of the milky way using the rave and GCS stellar surveys.

Chemical gradients in the Milky Way from the RAVE data: II. Giant stars (2014)
Journal Article
Boeche, C., Siebert, A., Piffl, T., Just, A., Steinmetz, M., Grebel, E. K., Sharma, S., Kordopatis, G., Gilmore, G., Chiappini, C., Freeman, K., Gibson, B. K., Munari, U., Siviero, A., Bienaymé, O., Navarro, J. F., Parker, Q. A., Reid, W., Seabroke, G. M., Watson, F. G., …Zwitter, T. (2014). Chemical gradients in the Milky Way from the RAVE data: II. Giant stars. Astronomy and Astrophysics, 568, Article A71. https://doi.org/10.1051/0004-6361/201423974

Aims. We provide new constraints on the chemo-dynamical models of the Milky Way by measuring the radial and vertical chemical gradients for the elements Mg, Al, Si, Ti, and Fe in the Galactic disc and the gradient variations as a function of the dist... Read More about Chemical gradients in the Milky Way from the RAVE data: II. Giant stars.

Pseudo-three-dimensional maps of the diffuse interstellar band at 862 nm (2014)
Journal Article
Kos, J., Zwitter, T., Wyse, R., Bienayme, O., Binney, J., Bland-Hawthorn, J., Freeman, K., Gibson, B. K., Gilmore, G., Grebel, E. K., Helmi, A., Kordopatis, G., Munari, U., Navarro, J., Parker, Q., Reid, W. A., Seabroke, G., Sharma, S., Siebert, A., Siviero, A., …Zwitter, T. (2014). Pseudo-three-dimensional maps of the diffuse interstellar band at 862 nm. Science, 345(6198), 791-795. https://doi.org/10.1126/science.1253171

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 know... Read More about Pseudo-three-dimensional maps of the diffuse interstellar band at 862 nm.

MaGICC baryon cycle: The enrichment history of simulated disc galaxies (2014)
Journal Article
Brook, C. B., Stinson, G., Gibson, B. K., Shen, S., Macciò, A. V., Obreja, A., Wadsley, J., & Quinn, T. (2014). MaGICC baryon cycle: The enrichment history of simulated disc galaxies. Monthly notices of the Royal Astronomical Society, 443(4), 3809-3818. https://doi.org/10.1093/mnras/stu1406

Using cosmological galaxy formation simulations from the MaGICC (Making Galaxies in a Cosmological Context) project, spanning stellar mass from ∼107 to 3 × 1010 M⊙, we trace the baryonic cycle of infalling gas from the virial radius through to its ev... Read More about MaGICC baryon cycle: The enrichment history of simulated disc galaxies.

Stellar origin of the ¹⁸²Hf cosmochronometer and the presolar history of solar system matter (2014)
Journal Article
Lugaro, M., Heger, A., Osrin, D., Goriely, S., Zuber, K., Karakas, A. I., Gibson, B. K., Doherty, C. L., Lattanzio, J. C., & Ott, U. (2014). Stellar origin of the ¹⁸²Hf cosmochronometer and the presolar history of solar system matter. Science, 345(6197), 650-653. https://doi.org/10.1126/science.1253338

Among the short-lived radioactive nuclei inferred to be present in the early solar system via meteoritic analyses, there are several heavier than iron whose stellar origin has been poorly understood. In particular, the abundances inferred for ¹⁸²Hf (... Read More about Stellar origin of the ¹⁸²Hf cosmochronometer and the presolar history of solar system matter.

The main sequence and the fundamental metallicity relation in MaGICC Galaxies: evolution and scatter (2014)
Journal Article
Obreja, A., Brook, C. B., Stinson, G., Domínguez-Tenreiro, R., Gibson, B. K., Silva, L., & Granato, G. L. (2014). The main sequence and the fundamental metallicity relation in MaGICC Galaxies: evolution and scatter. Monthly notices of the Royal Astronomical Society, 442(2), 1794-1804. https://doi.org/10.1093/mnras/stu891

Using cosmological galaxy simulations from the MaGICC project, we study the evolution of the stellar masses, star formation rates and gas-phase abundances of star-forming galaxies. We derive the stellar masses and star formation rates using observati... Read More about The main sequence and the fundamental metallicity relation in MaGICC Galaxies: evolution and scatter.

The role of feedback in shaping the structure of the interstellar medium (2014)
Journal Article
Walker, A. P., Gibson, B. K., Pilkington, K., Brook, C. B., Dutta, P., Stanimirović, S., Stinson, G. S., & Bailin, J. (2014). The role of feedback in shaping the structure of the interstellar medium. Monthly notices of the Royal Astronomical Society, 441(1), 525-531. https://doi.org/10.1093/mnras/stu419

We present an analysis of the role of feedback in shaping the neutral hydrogen (H i) content of simulated disc galaxies. For our analysis, we have used two realizations of two separate Milky Way-like (~L{black star}) discs - one employing a conservat... Read More about The role of feedback in shaping the structure of the interstellar medium.

Constraints on the Galactic bar from the Hercules stream as traced with RAVE across the Galaxy (2014)
Journal Article
Antoja, T., Helmi, A., Dehnen, W., Bienaymé, O., Bland-Hawthorn, J., Famaey, B., Freeman, K., Gibson, B. K., Gilmore, G., Grebel, E. K., Kordopatis, G., Kunder, A., Minchev, I., Munari, U., Navarro, J., Parker, Q., Reid, W. A., Seabroke, G., Siebert, A., Steinmetz, M., …Zwitter, T. (2014). Constraints on the Galactic bar from the Hercules stream as traced with RAVE across the Galaxy. Astronomy and Astrophysics, 563, A60-1-A60-17. https://doi.org/10.1051/0004-6361/201322623

Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as the Hercules stream. Assuming that Hercules is caused by the effects of the outer Lindblad resonance of the Galactic bar, we model analytically its prop... Read More about Constraints on the Galactic bar from the Hercules stream as traced with RAVE across the Galaxy.

A RAVE investigation on Galactic open clusters: I. Radial velocities and metallicities (2014)
Journal Article
Conrad, C., Scholz, R.-D., Kharchenko, N. V., Piskunov, A. E., Schilbach, E., Röser, S., Boeche, C., Kordopatis, G., Siebert, A., Williams, M., Munari, U., Matijevič, G., Grebel, E. K., Zwitter, T., De Jong, R. S., Steinmetz, M., Gilmore, G., Seabroke, G., Freeman, K., Navarro, J. F., …Siviero, A. (2014). A RAVE investigation on Galactic open clusters: I. Radial velocities and metallicities. Astronomy and Astrophysics, 562, A54. https://doi.org/10.1051/0004-6361/201322070

Context. Galactic open clusters (OCs) mainly belong to the young stellar population in the Milky Way disk, but are there groups and complexes of OCs that possibly define an additional level in hierarchical star formation? Current compilations are too... Read More about A RAVE investigation on Galactic open clusters: I. Radial velocities and metallicities.

The RAVE survey: the Galactic escape speed and the mass of the Milky Way (2014)
Journal Article
Scholz, R.-D., Williams, M. E., Matijevič, G., Bienaymé, O., Wyse, R. F., Piffl, T., Scannapieco, C., Binney, J., Steinmetz, M., Scholz, R. .-D., Williams, M. E. K., De Jong, R. S., Kordopatis, G., Matijevic, G., Bienayme, O., Bland-Hawthorn, J., Boeche, C., Freeman, K., Gibson, B., Gilmore, G., …Zwitter, T. (2014). The RAVE survey: the Galactic escape speed and the mass of the Milky Way. Astronomy and Astrophysics, 562, A91. https://doi.org/10.1051/0004-6361/201322531

We made new estimates of the Galactic escape speed at various Galactocentric radii using the latest data release of the RAdial Velocity Experiment (RAVE DR4). Compared to previous studies we have a database that is larger by a factor of 10, as well a... Read More about The RAVE survey: the Galactic escape speed and the mass of the Milky Way.

The environmental dependence of neutral hydrogen in the GIMIC simulations (2014)
Journal Article
Cunnama, D., Andrianomena, S., Cress, C. M., Faltenbacher, A., Gibson, B. K., & Theuns, T. (2014). The environmental dependence of neutral hydrogen in the GIMIC simulations. Monthly notices of the Royal Astronomical Society, 438(3), 2530-2537. https://doi.org/10.1093/mnras/stt2380

We use the Galaxies-Intergalactic Medium Interaction Calculation (GIMIC) cosmological hydrodynamic simulation at z = 0 to study the distribution and environmental dependence of neutral hydrogen (H I) gas in the outskirts of simulated galaxies. This g... Read More about The environmental dependence of neutral hydrogen in the GIMIC simulations.

A new stellar chemo-kinematic relation reveals the merger history of the milky way disk (2014)
Journal Article
Minchev, I., Chiappini, C., Martig, M., Steinmetz, M., De Jong, R. S., Boeche, C., Scannapieco, C., Zwitter, T., Wyse, R. F. G., Binney, J. J., Bland-Hawthorn, J., Bienaymé, O., Famaey, B., Freeman, K. C., Gibson, B. K., Grebel, E. K., Gilmore, G., Helmi, A., Kordopatis, G., Lee, Y. S., …Williams, M. (2014). A new stellar chemo-kinematic relation reveals the merger history of the milky way disk. Astrophysical journal. Letters, 781(1), L20. https://doi.org/10.1088/2041-8205/781/1/l20

The velocity dispersions of stars near the Sun are known to increase with stellar age, but age can be difficult to determine, so a proxy like the abundance of α elements (e.g., Mg) with respect to iron, [α/Fe], is used. Here we report an unexpected b... Read More about A new stellar chemo-kinematic relation reveals the merger history of the milky way disk.

Observationally-motivated analysis of simulated galaxies (2014)
Presentation / Conference Contribution
Gibson, B. K., MacFarlane, B. A., & Miranda, M. S. Observationally-motivated analysis of simulated galaxies. Presented at Proceedings of Science

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. The spatial and temporal relationships between stellar age, kinematics, and chemistry are a fundamental tool for uncovering the p... Read More about Observationally-motivated analysis of simulated galaxies.

Cloud angular momentum and effective viscosity in global SPH simulations with feedback (2014)
Journal Article
Williamson, D. J., Thacker, R. J., Wurster, J., & Gibson, B. K. (2014). Cloud angular momentum and effective viscosity in global SPH simulations with feedback. Monthly notices of the Royal Astronomical Society, 442(4), 3674-3685. https://doi.org/10.1093/mnras/stu1121

We examine simulations of isolated galaxies to analyse the effects of localized feedback on the formation and evolution of molecular clouds. Feedback contributes to turbulence and the destruction of clouds, leading to a population of clouds that is y... Read More about Cloud angular momentum and effective viscosity in global SPH simulations with feedback.

The VMC ESO Public Survey (2013)
Journal Article
Cioni, M.-R. L., Anders, P., Bagheri, G., Bekki, K., Clementini, G., Emerson, J., Evans, C. J., For, B.-Q., De Grijs, R., Gibson, B. K., Girardi, L., Groenewegen, M. A. T., Guandalini, R., Gullieuszik, M., Ivanov, V. D., Kamath, D., Marconi, M., Marquette, J.-B., Miszalski, B., Moore, B., …Zaggia, S. (2013). The VMC ESO Public Survey. The Messenger, 23-25

The VISTA near-infrared YJKs survey of the Magellanic Clouds system (VMC) has entered its core phase: about 50% of the observations across the Large and Small Magellanic Clouds (LMC, SMC), the Magellanic Bridge and Stream have already been secured an... Read More about The VMC ESO Public Survey.

Numerical simulations of bubble-induced star formation in dwarf irregular galaxies with a novel stellar feedback scheme (2013)
Journal Article
Kawata, D., Gibson, B. K., Barnes, D. J., Grand, R. J., & Rahimi, A. (2014). Numerical simulations of bubble-induced star formation in dwarf irregular galaxies with a novel stellar feedback scheme. Monthly notices of the Royal Astronomical Society, 438(2), 1208-1222. https://doi.org/10.1093/mnras/stt2267

To study the star formation and feedback mechanism, we simulate the evolution of an isolated dwarf irregular galaxy (dIrr) in a fixed dark matter halo, similar in size to Wolf–Lundmark–Melotte, using a new stellar feedback scheme. We use the new vers... Read More about Numerical simulations of bubble-induced star formation in dwarf irregular galaxies with a novel stellar feedback scheme.