All Outputs (122)

Impacts of a flaring star-forming disc and stellar radial mixing on the vertical metallicity gradient (2016)
Journal Article
Kawata, D., Grand, R. J. J., Gibson, B. K., Casagrande, L., Hunt, J. A. S., & Brook, C. B. (2017). Impacts of a flaring star-forming disc and stellar radial mixing on the vertical metallicity gradient. Monthly notices of the Royal Astronomical Society, 464(1), 702-712. https://doi.org/10.1093/mnras/stw2363

Using idealized N-body simulations of a Milky Way-sized disc galaxy, we qualitatively study how the metallicity distributions of the thin disc star particles are modified by the formation of the bar and spiral arm structures. The thin disc in our num... Read More about Impacts of a flaring star-forming disc and stellar radial mixing on the vertical metallicity gradient.

A search for an optical counterpart to the gravitational-wave event GW151226 (2016)
Journal Article
Smartt, S. J., Chambers, K. C., Smith, K. W., Huber, M. E., Young, D. R., Chen, T.-W., Inserra, C., Wright, D. E., Coughlin, M., Denneau, L., Flewelling, H., Heinze, A., Jerkstrand, A., Magnier, E. A., Maguire, K., Mueller, B., Rest, A., Sherstyuk, A., Stalder, B., Schultz, A. S. B., …Willman, M. (2016). A search for an optical counterpart to the gravitational-wave event GW151226. Astrophysical journal. Letters, 827(2), L40. https://doi.org/10.3847/2041-8205/827/2/l40

� 2016. The American Astronomical Society. All rights reserved.. We present a search for an electromagnetic counterpart of the gravitational-wave source GW151226. Using the Pan-STARRS1 telescope we mapped out 290 square degrees in the optical iP1fi... Read More about A search for an optical counterpart to the gravitational-wave event GW151226.

Geometrical structures of chemically decomposed thick and thin disk populations (2016)
Book Chapter
Kawata, D., Brook, C., Rahimi, A., & Gibson, B. (2017). Geometrical structures of chemically decomposed thick and thin disk populations.

We summarize the thick and thin disk formation commonly seen in cosmological N-body simulations. As suggested in Brook et al. (2004), a hierarchical clustering scenario causes multiple minor gas-rich mergers, and leads to the formation of a kinematic... Read More about Geometrical structures of chemically decomposed thick and thin disk populations.

Pan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational-wave source GW150914 (2016)
Journal Article
Smartt, S. J., Chambers, K. C., Smith, K. W., Huber, M. E., Young, D. R., Cappellaro, E., Wright, D. E., Coughlin, M., Schultz, A. S. B., Denneau, L., Flewelling, H., Heinze, A., Magnier, E. A., Primak, N., Rest, A., Sherstyuk, A., Stalder, B., Stubbs, C. W., Tonry, J., Waters, C., …Goggia, T. (2016). Pan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational-wave source GW150914. Monthly notices of the Royal Astronomical Society, 462(4), 4094-4116. https://doi.org/10.1093/mnras/stw1893

We searched for an optical counterpart to the first gravitational wave source discovered by LIGO (GW150914), using a combination of the Pan-STARRS1 wide-field telescope and the PESSTO spectroscopic follow-up programme. As the final LIGO sky maps chan... Read More about Pan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational-wave source GW150914.

The role of gas infall in the evolution of disc galaxies (2016)
Journal Article
Mollá, M., Díaz, Á. I., Gibson, B. K., Cavichia, O., & López-Sánchez, Á. R. (2016). The role of gas infall in the evolution of disc galaxies. Monthly notices of the Royal Astronomical Society, 462(2), 1329-1340. https://doi.org/10.1093/mnras/stw1723

Spiral galaxies are thought to acquire their gas through a protracted infall phase resulting in the inside-out growth of their associated discs. For field spirals, this infall occurs in the lower density environments of the cosmic web. The overall in... Read More about The role of gas infall in the evolution of disc galaxies.

Chemical separation of disc components using RAVE (2016)
Journal Article
Wojno, J., Kordopatis, G., Steinmetz, M., McMillan, P., Matijevič, G., Binney, J., Wyse, R. F. G., Boeche, C., Just, A., Grebel, E. K., Siebert, A., Bienaymé, O., Gibson, B. K., Zwitter, T., Bland-Hawthorn, J., Navarro, J. F., Parker, Q. A., 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

© 2016 The Authors. 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 sa... Read More about Chemical separation of disc components using RAVE.

Towards a fundamental astrometric reference system behind the Malleganic clouds : spectroscopic confirmation of new quasar candidates selected in the near-infrared (2016)
Journal Article
Ivanov, V. D., Cioni, M.-R. L., Bekki, K., De Grijs, R., Emerson, J., Gibson, B. K., Kamath, D., Van Loon, J. T., Piatti, A., & For, B.-Q. (2016). Towards a fundamental astrometric reference system behind the Malleganic clouds : spectroscopic confirmation of new quasar candidates selected in the near-infrared. The Messenger, 32-34

Quasi-stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. We have embarked on a programme t... Read More about Towards a fundamental astrometric reference system behind the Malleganic clouds : spectroscopic confirmation of new quasar candidates selected in the near-infrared.

New quasars behind the Magellanic Clouds. Spectroscopic confirmation of near-infrared selected candidates (2016)
Journal Article
Ivanov, V. D., Cioni, M.-R. L., Bekki, K., de Grijs, R., Emerson, J., Gibson, B. K., Kamath, D., van Loon, J. T., Piatti, A. E., & For, B.-Q. (2016). New quasars behind the Magellanic Clouds. Spectroscopic confirmation of near-infrared selected candidates. Astronomy and Astrophysics, 588, Article A93. https://doi.org/10.1051/0004-6361/201527398

Context. Quasi-stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. Deep wide-field, high an... Read More about New quasars behind the Magellanic Clouds. Spectroscopic confirmation of near-infrared selected candidates.

Properties of the outer regions of spiral disks: Abundances, colors and ages (2016)
Journal Article
Mollá, M., Díaz, A. I., Gibson, B. K., Cavichia, O., & López-Sánchez, Á.-R. (2016). Properties of the outer regions of spiral disks: Abundances, colors and ages. IAU symposium and colloquium proceedings series / International Astronomical Union. Symposium, 11(S321), 102-104. https://doi.org/10.1017/s1743921316011030

© 2017 International Astronomical Union. We summarize the results obtained from our suite of chemical evolution models for spiral disks, computed for different total masses and star formation efficiencies. Once the gas, stars and star formation radia... Read More about Properties of the outer regions of spiral disks: Abundances, colors and ages.

Origin of the metallicity distribution in the thick disc (2016)
Journal Article
Miranda, M. S., Pilkington, K., Gibson, B. K., Brook, C. B., Sánchez-Blázquez, P., Minchev, I., Few, C. G., Smith, R., Domínguez-Tenreiro, R., Obreja, A., Bailin, J., & Stinson, G. S. (2016). Origin of the metallicity distribution in the thick disc. Astronomy and Astrophysics, 587, Article A10. https://doi.org/10.1051/0004-6361/201525789

Using a suite of cosmological chemodynamical disc galaxy simulations, we assess how (a) radial metallicity gradients evolve with scaleheight; (b) the vertical metallicity gradients change through the thick disc; and (c) the vertical gradient of the s... Read More about Origin of the metallicity distribution in the thick disc.

Identification of Globular Cluster Stars in RAVE data II: Extended tidal debris around NGC 3201 (2016)
Journal Article
Anguiano, B., De Silva, G. M., Freeman, K., Da Costa, G. S., Zwitter, T., Quillen, A. C., Zucker, D. B., Navarro, J. F., Kunder, A., Siebert, A., Wyse, R. F. G., Grebel, E. K., Kordopatis, G., Gibson, B. K., Seabroke, G., Sharma, S., Wojno, J., Bland-Hawthorn, J., Parker, Q. A., Steinmetz, M., …Watson, F. (2016). Identification of Globular Cluster Stars in RAVE data II: Extended tidal debris around NGC 3201. Monthly notices of the Royal Astronomical Society, 457(2), 2078-2085. https://doi.org/10.1093/mnras/stw083

We report the identification of extended tidal debris potentially associated with the globular cluster NGC 3201, using the RAdial Velocity Experiment (RAVE) catalogue. We find the debris stars are located at a distance range of 1–7 kpc based on the f... Read More about Identification of Globular Cluster Stars in RAVE data II: Extended tidal debris around NGC 3201.

The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies (2016)
Journal Article
Ruiz-Lara, T., Few, C. G., Gibson, B. K., Pérez, I., Florido, E., Minchev, I., & Sánchez-Blázquez, P. (2016). The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies. Astronomy and Astrophysics, 586, A112. https://doi.org/10.1051/0004-6361/201526470

Aims. We study the effects of the cosmological assembly history on the chemical and dynamical properties of the discs of spiral galaxies as a function of radius. Methods. We made use of the simulated Milky Way mass, fully-cosmological discs from Rams... Read More about The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies.

Weighing the galactic disc using the Jeans equation: lessons from simulations (2016)
Journal Article
Candlish, G. N., Smith, R., Moni Bidin, C., & Gibson, B. K. (2016). Weighing the galactic disc using the Jeans equation: lessons from simulations. Monthly notices of the Royal Astronomical Society, 456(4), 3456-3474. https://doi.org/10.1093/mnras/stv2792

Using three-dimensional stellar kinematic data from simulated galaxies, we examine the efficacy of a Jeans equation analysis in reconstructing the total disk surface density, including the dark matter, at the ‘Solar’ radius. Our simulation data set i... Read More about Weighing the galactic disc using the Jeans equation: lessons from simulations.

The history of stellar metallicity in a simulated disc galaxy (2016)
Journal Article
Snaith, O. N., Bailin, J., Gibson, B. K., Bell, E. F., Stinson, G., Valluri, M., Wadsley, J., & Couchman, H. (2016). The history of stellar metallicity in a simulated disc galaxy. Monthly notices of the Royal Astronomical Society, 456(3), 3119-3141. https://doi.org/10.1093/mnras/stv2788

We explore the chemical distribution of stars in a simulated galaxy. Using simulations of the same initial conditions but with two different feedback schemes (McMaster Unbiased Galaxy Simulations – MUGS – and Making Galaxies in a Cosmological Context... Read More about The history of stellar metallicity in a simulated disc galaxy.

Galactic archaeology and minimum spanning trees (2015)
Book Chapter
MacFarlane, B. A., Gibson, B. K., & Flynn, C. M. L. (2015). Galactic archaeology and minimum spanning trees. In I. Skillen, M. Balcells, & S. Trager (Eds.), Multi-Object Spectroscopy in the Next Decade: Big Questions, Large Surveys, and Wide Fields (79-83). Astronomical Society of the Pacific

Chemical tagging of stellar debris from disrupted open clusters and associations underpins the science cases for next-generation multi-object spectroscopic surveys. As part of the Galactic Archaeology project TraCD (Tracking Cluster Debris), a prelim... Read More about Galactic archaeology and minimum spanning trees.

The sensitivity of harassment to orbit: Mass loss from early-type dwarfs in galaxy clusters (2015)
Journal Article
Smith, R., Sánchez-Janssen, R., Beasley, M. A., Candlish, G. N., Gibson, B. K., Puzia, T. H., Janz, J., Knebe, A., Aguerri, J. A., Lisker, T., Hensler, G., Fellhauer, M., Ferrarese, L., & Yi, S. K. (2015). The sensitivity of harassment to orbit: Mass loss from early-type dwarfs in galaxy clusters. Monthly notices of the Royal Astronomical Society, 454(3), 2502-2516. https://doi.org/10.1093/mnras/stv2082

We conduct a comprehensive numerical study of the orbital dependence of harassment on early-type dwarfs consisting of 168 different orbits within a realistic, Virgo-like cluster, varying in eccentricity and pericentre distance. We find harassment is... Read More about The sensitivity of harassment to orbit: Mass loss from early-type dwarfs in galaxy clusters.

Carbon-rich presolar grains from massive stars : subsolar ¹²C/¹³C and ¹⁴N/¹⁵N ratios and the mystery of ¹⁵N (2015)
Journal Article
Pignatari, M., Zinner, E., Hoppe, P., J. Jordan, C., K. Gibson, B., Trappitsch, R., Herwig, F., Fryer, C., Hirschi, R., & X. Timmes, F. (2015). Carbon-rich presolar grains from massive stars : subsolar ¹²C/¹³C and ¹⁴N/¹⁵N ratios and the mystery of ¹⁵N. Astrophysical journal. Letters, 808(2), L43. https://doi.org/10.1088/2041-8205/808/2/L43

Carbon-rich grains with isotopic anomalies compared to the Sun are found in primitive meteorites. They were made by stars, and carry the original stellar nucleosynthesis signature. Silicon carbide grains of Type X and C and low-density (LD) graphites... Read More about Carbon-rich presolar grains from massive stars : subsolar ¹²C/¹³C and ¹⁴N/¹⁵N ratios and the mystery of ¹⁵N.

Galactic chemical evolution: Stellar yields and the initial mass function (2015)
Journal Article
Mollá, M., Cavichia, O., Gavilán, M., & Gibson, B. K. (2015). Galactic chemical evolution: Stellar yields and the initial mass function. Monthly notices of the Royal Astronomical Society, 451(4), 3693-3708. https://doi.org/10.1093/mnras/stv1102

We present a set of 144 Galactic chemical evolution models applied to a Milky Way analogue, computed using four sets of low+intermediate star nucleosynthetic yields, six massive star yield compilations, and six functional forms for the initial mass f... Read More about Galactic chemical evolution: Stellar yields and the initial mass function.

Tracking Cluster Debris (TraCD) – I. Dissolution of clusters and searching for the solar cradle (2015)
Journal Article
Moyano Loyola, G. R., Flynn, C., Hurley, J. R., & Gibson, B. K. (2015). Tracking Cluster Debris (TraCD) – I. Dissolution of clusters and searching for the solar cradle. Monthly notices of the Royal Astronomical Society, 449(4), 4443-4457. https://doi.org/10.1093/mnras/stv550

The capability to reconstruct dissolved stellar systems in dynamical and chemical space is a key factor in improving our understanding of the evolution of the Milky Way. Here we concentrate on the dynamical aspect and given that a significant portion... Read More about Tracking Cluster Debris (TraCD) – I. Dissolution of clusters and searching for the solar cradle.

Simple and accurate modelling of the gravitational potential produced by thick and thin exponential discs (2015)
Journal Article
Smith, R., Flynn, C., Candlish, G. N., Fellhauer, M., & Gibson, B. K. (2015). Simple and accurate modelling of the gravitational potential produced by thick and thin exponential discs. Monthly notices of the Royal Astronomical Society, 448(3), 2934-2940. https://doi.org/10.1093/mnras/stv228

We present accurate models of the gravitational potential produced by a radially exponential disc mass distribution. The models are produced by combining three separate Miyamoto–Nagai discs. Such models have been used previously to model the disc of... Read More about Simple and accurate modelling of the gravitational potential produced by thick and thin exponential discs.