Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Max Planck SocietyDE1.2k papers
- Centre National de la Recherche ScientifiqueFR1k papers
- National Institute for AstrophysicsIT820 papers
- European Southern ObservatoryCL784 papers
- Center for Astrophysics Harvard & SmithsonianUS755 papers
- Max Planck Institute for Extraterrestrial PhysicsDE722 papers
- Ludwig-Maximilians-Universität MünchenDE639 papers
- Space Research InstituteRU602 papers
- Osservatorio Astronomico di PadovaIT600 papers
- California Institute of TechnologyUS581 papers
- Trieste Astronomical ObservatoryIT566 papers
- University of California, BerkeleyUS566 papers
33 papers · 2 filters
Modelling the formation of today's massive ellipticals
Thorsten Naab
The discovery of a population of massive, compact and quiescent early-type galaxies has changed the view on plausible formation scenarios for the present day population of elliptic…
Mass estimates from stellar proper motions: The mass of Centauri
R. D'Souza, Hans-Walter Rix
We lay out and apply methods to use proper motions of individual kinematic tracers for estimating the dynamical mass of star clusters. We first describe a simple projected mass est…
The Dark Halo - Spheroid Conspiracy and the Origin of Elliptical Galaxies
Rhea-Silvia Remus, Andreas Burkert, Klaus Dolag +4
Dynamical modeling and strong lensing data indicate that the total density profiles of early-type galaxies are close to isothermal, i.e., rho_tot ~ r^gamma with gamma approx -2. To…
Resolving infall caustics in dark matter halos
K. Dolag, A. D. Dolgov, I. I. Tkachev
We have found that the phase-space of a dark matter particles assembling a galactic halo in cosmological N-body simulations has well defined fine grained structure. Recently accret…
M87 at metre wavelengths: the LOFAR picture
F. de Gasperin, E. Orru', M. Murgia +92
M87 is a giant elliptical galaxy located in the centre of the Virgo cluster, which harbours a supermassive black hole of mass 6.4x10^9 M_sun, whose activity is responsible for the…
Galacto-forensic of LMC's orbital history as a probe for the dark matter potential in the outskirt of the Galaxy
Xiaojia Zhang, Douglas N. C. Lin, Andreas Burkert +1
The 3D observed velocities of the Large and Small Magellanic Clouds(LMC and SMC) provide an opportunity to probe the Galactic potential in the outskirt of the Galactic halo. Based…
Eccentric disc instability in stellar discs formed from inspiraling gas clouds in the Galactic Centre
Alessia Gualandris, Michela Mapelli, Hagai B. Perets
The inspiral of a turbulent molecular cloud in the Galactic Centre may result in the formation of a small, dense and moderately eccentric gas disc around the supermassive black hol…
A galactic-scale origin for stellar clustering
J. M. Diederik Kruijssen
We recently presented a model for the cluster formation efficiency (CFE), i.e. the fraction of star formation occurring in bound stellar clusters. It utilizes the idea that the for…
Variations in the Galactic star formation rate and density thresholds for star formation
S. N. Longmore, J. Bally, L. Testi +11
The conversion of gas into stars is a fundamental process in astrophysics and cosmology. Stars are known to form from the gravitational collapse of dense clumps in interstellar mol…
The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction
David Yong, John E. Norris, M. S. Bessell +6
We examine the metallicity distribution function (MDF) and fraction of carbon-enhanced metal-poor (CEMP) stars in a sample that includes 86 stars with [Fe/H] < -3.0, based on high-…
The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.5
David Yong, John E. Norris, M. S. Bessell +6
We present a homogeneous chemical abundance analysis of 16 elements in 190 metal-poor Galactic halo stars (38 program and 152 literature objects). The sample includes 171 stars wit…
The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters
John E. Norris, M. S. Bessell, David Yong +7
We report the discovery of 34 stars in the Hamburg/ESO Survey for metal-poor stars and the Sloan Digital Sky Survey that have [Fe/H] < -3.0. Their median and minimum abundances are…
Radial Flows and Angular Momentum Conservation in Galactic Chemical Evolution
Thomas Bilitewski, Ralph Schönrich
We study the effects of radial flows on Galactic chemical evolution. A simple analytic scheme is developed prescribing the coupling of infall from the intergalactic medium and radi…
Galactic Rotation and Solar Motion from Stellar Kinematics
Ralph Schönrich
I present three methods to determine the distance to the Galactic centre R0, the solar azimuthal velocity in the Galactic rest frame Vg,\odot and hence the local circular speed Vc…
Gas depletion in cluster galaxies depends strongly on their internal structure
Wei Zhang, Cheng Li, Guinevere Kauffmann +1
We analyze galaxies in 300 nearby groups and clusters identified in the Sloan Digital Sky Survey using a photometric gas mass indicator that is useful for estimating the degree to…
Dispersal of molecular clouds by ionising radiation
S. Walch, A. P. Whitworth, T. Bisbas +2
The role of feedback from massive stars is believed to be a key element in the evolution of molecular clouds. We use high-resolution 3D SPH simulations to explore the dynamical eff…
Relaxation and Stripping: The Evolution of Sizes, Dispersions and Dark Matter Fractions in Major and Minor Mergers of Elliptical Galaxies
Michael Hilz, Thorsten Naab, Jeremiah P. Ostriker +3
We revisit collisionless major and minor mergers of spheroidal galaxies in the context of the size evolution of elliptical galaxies. The simulations are performed as a series of me…
The Spatial Distribution of Galactic Satellites in the LCDM Cosmology
Jie Wang, Carlos S. Frenk, Andrew P. Cooper
We investigate the spatial distribution of galactic satellites in high resolution simulations of structure formation in the LCDM model: the Aquarius dark matter simulations of indi…
How do minor mergers promote inside-out growth of ellipticals, transforming the size, density profile and dark matter fraction?
Michael Hilz, Thorsten Naab, Jeremiah P. Ostriker
There is observational evidence for inside-out growth of elliptical galaxies since , which is not driven by in-situ star formation. Many systems at high redshift hav…
Rotating Accretion Flows: From Infinity to the Black Hole
Jason Li, Jeremiah Ostriker, Rashid Sunyaev
Accretion onto a supermassive black hole of a rotating inflow is a particularly difficult problem to study because of the wide range of length scales involved. There have been broa…
Synthetic X-ray and radio maps for two different models of Stephan's Quintet
Annette Geng, Alexander M. Beck, Klaus Dolag +4
We present simulations of the compact galaxy group Stephan's Quintet (SQ) including magnetic fields, performed with the N-body/smoothed particle hydrodynamics (SPH) code \textsc{Ga…
The satellites of the Milky Way - Insights from semi-analytic modelling in a LambdaCDM cosmology
Else Starkenburg, Amina Helmi, Gabriella De Lucia +7
We combine the six high-resolution Aquarius dark matter simulations with a semi-analytic galaxy formation model to investigate the properties of the satellites of Milky Way-like ga…
High-velocity stars in the cores of globular clusters: The illustrative case of NGC 2808
Nora Lützgendorf, Alessia Gualandris, Markus Kissler-Patig +7
We report the detection of five high-velocity stars in the core of the globular cluster NGC 2808. The stars lie on the the red giant branch and show total velocities between 40 and…
The cold veil of the Milky Way stellar halo
A. J. Deason, V. Belokurov, N. W. Evans +7
We build a sample of distant (D > 80 kpc) stellar halo stars with measured radial velocities. Faint () candidate blue horizontal branch (BHB) stars were selected using…