1.6k citations · 17.3k across the 245 of their papers we have counts for
127 papers · 1 filter
Dynamics of substructures in warm dark-matter cosmologies
Bastian Arnold, Alexander Knebe, Chris Power +1
We performed cosmological simulations based upon both a cold dark matter (CDM) and a warm dark matter (WDM) model. The focus of our investigations lies with selected spatial and ki…
Estimation of the Tilt of the Stellar Velocity Ellipsoid from RAVE and Implications for Mass Models
A. Siebert, O. Bienaymé, J. Binney +16
We present a measure of the inclination of the velocity ellipsoid at 1 kpc below the Galactic plane using a sample of red clump giants from the RAVE DR2 release. We find that the v…
Hydrodynamical Adaptive Mesh Refinement Simulations of Disk Galaxies
Brad K. Gibson, Stephanie Courty, Patricia Sanchez-Blazquez +4
To date, fully cosmological hydrodynamic disk simulations to redshift zero have only been undertaken with particle-based codes, such as GADGET, Gasoline, or GCD+. In light of the (…
The Evolution Of Carbon, Sulphur, and Titanium Isotopes from High-Redshift to the Local Universe
G. L. Hughes, B. K. Gibson, L. Carigi +3
Recent observations of carbon, sulphur, and titanium isotopes at redshifts z~1 and in the local stellar disc and halo have opened a new window into the study of isotopic abundance…
Diffuse interstellar bands in RAVE Survey spectra
U. Munari, L. Tomasella, M. Fiorucci +19
We have used spectra of hot stars from the RAVE Survey in order to investigate the visibility and properties of five diffuse interstellar bands previously reported in the literatur…
The Radial Velocity Experiment (RAVE): second data release
T. Zwitter, A. Siebert, U. Munari +51
We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities (RVs) and stellar atmosphere parameters…
The radial alignment of dark matter subhalos: from simulations to observations
Alexander Knebe, Hideki Yahagi, Hiroyuki Kase +2
We explore the radial alignment of subhalos in 2-dimensional projections of cosmological simulations. While most other recent studies focussed on quantifying the signal utilizing t…
On the relation between radial alignment of dark matter subhalos and host mass in cosmological simulations
Alexander Knebe, Nadya Draganova, Chris Power +4
We explore the dependence of the radial alignment of subhalos on the mass of the host halo they orbit in. As the effect is seen on a broad range of scales including massive cluster…
The Dynamics of Subhalos in Warm Dark Matter Models
Alexander Knebe, Bastian Arnold, Chris Power +1
We present a comparison of the properties of substructure halos (subhalos) orbiting within host halos that form in Cold Dark Matter (CDM) and Warm Dark Matter (WDM) cosmologies. Ou…
Simulating the Mass-Metallicity Relation from z=1
Mustapha Mouchine, Brad K. Gibson, Agostino Renda +1
We use 112 N-body/hydrodynamical simulations in the standard Cold Dark Matter universe, to follow the formation of galaxy-sized halos and investigate the chemical enrichment of bot…
Galactic kinematics with RAVE data: I. The distribution of stars towards the Galactic poles
L. Veltz, O. Bienaymé, K. C. Freeman +16
We analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. The c…
Is the sky falling? Searching for stellar streams in the local Milky Way disc in the CORAVEL and RAVE surveys
G. M. Seabroke, G. Gilmore, A. Siebert +19
We have searched for in-falling stellar streams on to the local Milky Way disc in the CORAVEL and RAVE surveys. The CORAVEL survey consists of local dwarf stars (Nordstrom et al. G…
Modeling the chemical evolution of Omega Centauri using three-dimensional hydrodynamical simulations
A. Marcolini, A. Sollima, A. D'Ercole +2
We present a hydrodynamical and chemical model for the globular cluster Omega Cen, under the assumption that it is the remnant of an ancient dwarf spheroidal galaxy (dSph), the bul…
The Chemistry of the Local Group
Brad K. Gibson
Simulations of the chemical enrichment histories of ten Local Group (LG) dwarf galaxies are presented, employing empirically-derived star formation histories (SFHs), a rich network…
Galactic Sodium from AGB Stars
Robert G. Izzard, Brad K. Gibson, Richard J. Stancliffe
Galactic chemical evolution models which include sodium from type II supernovae alone underestimate the abundance of sodium in the interstellar medium by a factor of two to three o…
The Spatial Distribution of the Galactic First Stars I: High-Resolution N-body Approach
Evan Scannapieco, Daisuke Kawata, Chris B. Brook +3
We study the spatial distribution of Galactic metal-free stars by combining an extremely high-resolution (7.8 X 10^5 solar masses per particle) Cold Dark Matter N-body simulation o…
Two Disk Components from a Gas Rich Disk-Disk Merger
Chris Brook, Simon Richard, Daisuke Kawata +2
We employ N-body, smoothed particle hydrodynamical simulations, including detailed treatment of chemical enrichment, to follow a gas-rich merger which results in a galaxy with disk…
Chemodynamical Simulations of Elliptical Galaxies
Brad K. Gibson, Patricia Sanchez-Blazquez, Stephanie Courty +1
We review recent developments in the field of chemodynamical simulations of elliptical galaxies, highlighting (in an admittedly biased fashion) the work conducted with our cosmolog…
The RAVE Survey: Constraining the Local Galactic Escape Speed
M. C. Smith, G. R. Ruchti, A. Helmi +20
We report new constraints on the local escape speed of our Galaxy. Our analysis is based on a sample of high velocity stars from the RAVE survey and two previously published datase…
The Northern HIPASS catalogue - Data presentation, completeness and reliability measures
O. I. Wong, E. V. Ryan-Weber, D. A. Garcia-Appadoo +32
The Northern HIPASS catalogue (NHICAT) is the northern extension of the HIPASS catalogue, HICAT (Meyer et al. 2004). This extension adds the sky area between the declination range…
MACHOs in dark matter haloes
Janne Holopainen, Chris Flynn, Alexander Knebe +2
Using eight dark matter haloes extracted from fully-self consistent cosmological N-body simulations, we perform microlensing experiments. A hypothetical observer is placed at a dis…
Cosmological implications of dwarf spheroidal chemical evolution
Yeshe Fenner, Brad K. Gibson, Roberto Gallino +1
The chemical properties of dwarf spheroidals in the local group are shown to be inconsistent with star formation being truncated after the reionization epoch (z~8). Enhanced levels…
Gas Rich Mergers in Disk Formation
Chris B. Brook, Vincent Veilleux, Daisuke Kawata +2
In order to explain disk galaxy formation within the hierarchical structure formation, it seems that gas rich mergers must play an important role. We review here our previous studi…
Galaxy Groups: Proceedings from a Swinburne University Workshop
Virginia A. Kilborn, Kenji Bekki, Sarah Brough +6
We present the proceedings from a 2-day workshop held at Swinburne University on the 24th-25th of May 2005. The workshop participants highlighted current Australian research on bot…