428 citations · 7.6k across the 120 of their papers we have counts for
45 papers · 1 filter
A Schmidt-Kennicutt law for star formation in the Milky Way disk
B. Fuchs, H. Jahreiss, C. Flynn
We use a new method to trace backwards the star formation history of the Milky Way disk, using a sample of M dwarfs in the solar neighbourhood which is representative for the entir…
Are the red halos of galaxies made of low-mass stars? Constraints from subdwarf star counts in the Milky Way halo
E. Zackrisson, C. Flynn
Surface photometry detections of red and exceedingly faint halos around galaxies have resurrected the old question of whether some non-negligible fraction of the missing baryons of…
Dynamical effects of the long bar in the Milky Way
Esko Gardner, Kimmo A. Innanen, Chris Flynn
We examine the dynamical effects on disk stars of a "long bar" in the Milky Way by inserting a triaxial rotating bar into an axisymmetric disk+bulge+dark halo potential and integra…
A comprehensive comparison of the Sun to other stars: searching for self-selection effects
Jose A. Robles, Charles H. Lineweaver, Daniel Grether +5
If the origin of life and the evolution of observers on a planet is favoured by atypical properties of a planet's host star, we would expect our Sun to be atypical with respect to…
An analytical model of surface mass densities of cold dark matter haloes - with an application to MACHO microlensing optical depths
Janne Holopainen, Erik Zackrisson, Alexander Knebe +5
The cold dark matter (CDM) scenario generically predicts the existence of triaxial dark matter haloes which contain notable amounts of substructure. However, analytical halo models…
The Helium abundance and Delta Y / Delta Z in Lower Main Sequence stars
Luca Casagrande, Chris Flynn, Laura Portinari +2
We use nearby K dwarf stars to measure the helium-to-metal enrichment ratio, a diagnostic of the chemical history of the Solar Neighbourhood. Our sample of K dwarfs has homogeneous…
Broadband UBVRI Photometry of Horizontal-Branch and Metal-Poor Candidates from the HK and Hamburg/ESO Surveys. I
Timothy C. Beers, Chris Flynn, Silvia Rossi +17
We report broadband UBV and/or BVRI CCD photometry for a total of 1857 stars in the thick-disk and halo populations of the Galaxy. The majority of our targets were selected as cand…
The search for the origin of the Local Bubble redivivus
B. Fuchs, D. Breitschwerdt, M. A. de Avillez +2
We present a new unbiased search and analysis of all B stars in the solar neighbourhood (within a volume of 400 pc diameter) using the Arivel data base to track down the remains of…
On the mass-to-light ratio of the local Galactic disc and the optical luminosity of the Galaxy
Chris Flynn, Johan Holmberg, Laura Portinari +2
We measure the volume luminosity density and surface luminosity density generated by the Galactic disc, using accurate data on the local luminosity function and the disc's vertical…
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…
The colours of the Sun
Johan Holmberg, Chris Flynn, Laura Portinari
We compile a sample of Sun-like stars with accurate effective temperatures, metallicities and colours (from the UV to the near-IR). A crucial improvement is that the effective temp…
The Stellar Halo Metallicity - Luminosity Relationship for Spiral Galaxies
Agostino Renda, Brad K. Gibson, Mustapha Mouhcine +4
The stellar halos of spiral galaxies bear important chemo-dynamical signatures of galaxy formation. We present here the analysis of 89 semi-cosmological spiral galaxy simulations,…
Kinematics of the Galactic Halo from Horizontal Branch stars in the Hamburg/ESO Survey
Christopher Thom, Chris Flynn, Michael S. Bessell +6
Large samples of Field Horizontal Branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our G…
Chemical enrichment and star formation in the Milky Way disk III. Chemodynamical constraints
H. J. Rocha-Pinto, C. Flynn, J. Scalo +3
In this paper, we investigate some chemokinematical properties of the Milky Way disk, by using a sample composed by 424 late-type dwarfs. We show that the velocity dispersion of a…
Is the Initial Mass Function of Low Surface Brightness Galaxies Dominated by Low Mass Stars?
Hyun-chul Lee, Brad K. Gibson, Chris Flynn +2
The rotation curves of low surface brightness (LSB) galaxies suggest that they possess significantly higher mass-to-light (M/L) ratios than their high surface brightness counterpar…
The local surface density of disc matter mapped by Hipparcos
Johan Holmberg, Chris Flynn
We determine the surface density of matter in the disc of the Galaxy at the solar position using K giant stars. The local space density and luminosity function of the giants is det…
Luminosity limits on white dwarfs in a Galactic shroud
Janne Holopainen, Chris Flynn
We place observational constraints on a recently proposed Galactic population, dubbed the shroud (Gyuk & Gates 1999, Gates & Gyuk 2001). The shroud would be a very thick Galactic d…
Photometric Properties of White Dwarf Dominated Halos
H. -c. Lee, B. K. Gibson, Y. Fenner +5
Using stellar population synthesis techniques, we explore the photometric signatures of white dwarf progenitor dominated galactic halos, in order to constrain the fraction of halo…
M Dwarfs from Hubble Space Telescope Star Counts. V. The I-band Luminosity Function
Zheng Zheng, Chris Flynn, Andrew Gould +2
We derive the disk I-band luminosity function from the Zheng et al. sample of \~1400 disk M dwarfs observed with the Hubble Space Telescope. We adopt a Galactic-height-dependent co…
The cosmic production of Helium
Raul Jimenez, Chris Flynn, James MacDonald +1
We estimate the cosmic production rate of helium relative to metals () using K dwarf stars in the Hipparcos catalog with accurate spectroscopic metallicities. The best fitti…
Galactic Halo Stars in Phase Space :A Hint of Satellite Accretion?
Chris B. Brook, Daisuke Kawata, Brad K. Gibson +1
The present day chemical and dynamical properties of the Milky Way bear the imprint of the Galaxy's formation and evolutionary history. One of the most enduring and critical debate…
On the origin of high eccentricity halo stars
C. B. Brook, D. Kawata, B. K. Gibson +1
The present-day chemical and dynamical properties of the Milky Way are signatures of the Galaxy's formation and evolution. Using a self consistent chemodynamical evolution code we…
Cosmology on a Mesh
Stuart P. D. Gill, Alexander Knebe, Brad K. Gibson +3
An adaptive multi grid approach to simulating the formation of structure from collisionless dark matter is described. MLAPM (Multi-Level Adaptive Particle Mesh) is one of the most…
Simulations of the heating of the Galactic stellar disc
Jyrki Hanninen, Chris Flynn
The velocity dispersion of nearby stars in the Galactic disc is well known to increase substantially with age; this is the so-called Age-Velocity relation, and is interpreted as a…