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
45 papers · 2 filters
The Aquila comparison Project: The Effects of Feedback and Numerical Methods on Simulations of Galaxy Formation
C. Scannapieco, M. Wadepuhl, O. H. Parry +20
We compare the results of thirteen cosmological gasdynamical codes used to simulate the formation of a galaxy in the LCDM structure formation paradigm. The various runs differ in t…
What Velocities and Eccentricities tell us about Radial Migration
Ralph Schoenrich
This note attempts to interpret some of the recent findings about a downtrend in the mean azimuthal velocity of low [alpha/Fe] thin disc stars with increasing metallicity. The pres…
The formation of shell galaxies similar to NGC 7600 in the cold dark matter cosmogony
Andrew P. Cooper, David Martinez-Delgado, John Helly +6
We present new deep observations of 'shell' structures in the halo of the nearby elliptical galaxy NGC 7600, alongside a movie of galaxy formation in a cold dark matter universe (a…
An improved map of the Galactic Faraday sky
N. Oppermann, H. Junklewitz, G. Robbers +28
We aim to summarize the current state of knowledge regarding Galactic Faraday rotation in an all-sky map of the Galactic Faraday depth. For this we have assembled the most extensiv…
The detection and treatment of distance errors in kinematic analyses of stars
Ralph Schoenrich, James Binney, Martin Asplund
We present a new method for detecting and correcting systematic errors in the distances to stars when both proper motions and line-of-sight velocities are available. The method, wh…
Metallicity Gradients in the Milky Way Disk as Observed by the SEGUE Survey
Judy Y. Cheng, Constance M. Rockosi, Heather L. Morrison +6
The observed radial and vertical metallicity distribution of old stars in the Milky Way disk provides a powerful constraint on the chemical enrichment and dynamical history of the…
A new formula for disc kinematics
Ralph Schoenrich, James Binney
In a disc galaxy the distribution of azimuthal components of velocity is very skew. In the past this skewness has been modelled by superposed Gaussians. We use dynamical arguments…
The subgiant branch of omega Cen seen through high-resolution spectroscopy. II. The most metal-rich population
E. Pancino, A. Mucciarelli, P. Bonifacio +2
We analyze spectra of 18 stars belonging to the faintest subgiant branch in omega Centauri (the SGB-a), obtained with GIRAFFE@VLT at a resolution o R~17000 and a S/N ratio between…
X-Shooter GTO: Chemical analysis of a sample of EMP candidates
E. Caffau, P. Bonifacio, P. François +11
Context: Extremely metal-poor stars (EMP) are very rare objects that hold in their atmospheres the fossil record of the chemical composition of the early phases of Galactic evoluti…
The dynamical state of stellar structure in star-forming regions
J. M. Diederik Kruijssen, Thomas Maschberger, Nickolas Moeckel +3
The fraction of star formation that results in bound star clusters is influenced by the density spectrum in which stars are formed and by the response of the stellar structure to g…
Massive black hole binary plane reorientation in rotating stellar systems
Alessia Gualandris, Massimo Dotti, Alberto Sesana
We study the evolution of the orientation of the orbital plane of massive black hole binaries (BHBs) in rotating stellar systems in which the total angular momentum of the stellar…
INTEGRAL constraints on the Galactic hard X-ray background from the Milky Way anticenter
R. Krivonos, S. Tsygankov, M. Revnivtsev +3
We present results of a study of the Galactic ridge X-ray emission (GRXE) in hard X-rays with the IBIS telescope on board INTEGRAL in the region near the Galactic Anticenter (GA) a…
The G305 star-forming complex: the central star clusters Danks 1 and Danks 2
Ben Davies, J. S. Clark, Christine Trombley +7
The G305 HII complex (G305.4+0.1) is one of the most massive star forming structures yet identified within the Galaxy. It is host to many massive stars at all stages of formation a…
Magnetic field amplification and X-ray emission in galaxy minor mergers
Annette Geng, Hanna Kotarba, Florian Bürzle +4
We investigate the magnetic field evolution in a series of galaxy minor mergers using the N-body/smoothed particle hydrodynamics (SPH) code \textsc{Gadget}. The simulations include…
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. IV. Two bulge populations
T. Bensby, D. Adén, J. Meléndez +21
[ABRIDGED] Based on high-resolution (R~42000 to 48000) and high signal-to-noise (S/N~50 to 150) spectra obtained with UVES/VLT, we present detailed elemental abundances (O, Na, Mg,…
Discovery of a super-Li rich turn-off star in the metal poor globular cluster NGC 6397
Andreas Koch, Karin Lind, R. Michael Rich
We report on the discovery of a super-Li rich turn-off star in the old (12 Gyr), metal poor ([Fe/H]=-2.1 dex) globular cluster (GC) NGC 6397, based on high-resolution MIKE/Magellan…
Evolution of the Most Massive Galaxies to z=0.6: I. A New Method for Physical Parameter Estimation
Yan-Mei Chen, Guinevere Kauffmann, Christy A. Tremonti +10
We use principal component analysis (PCA) to estimate stellar masses, mean stellar ages, star formation histories (SFHs), dust extinctions and stellar velocity dispersions for ~290…
Coronal radiation of a cusp of spun-up stars and the X-ray luminosity of Sgr A*
S. Sazonov, R. Sunyaev, M. Revnivtsev
Chandra has detected optically thin, thermal X-ray emission with a size of ~1 arcsec and luminosity ~10^33 erg/s from the direction of the Galactic supermassive black hole (SMBH),…
Long-term evolution of massive black hole binaries. IV. Mergers of galaxies with collisionally relaxed nuclei
Alessia Gualandris, David Merritt
We simulate mergers between galaxies containing collisionally-relaxed nuclei around massive black holes (MBHs). Our galaxies contain four mass groups, representative of old stellar…
Grand Design and Flocculent Spirals in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
Debra Meloy Elmegreen, the S4G Team
Spiral arm properties of 46 galaxies in the Spitzer Survey of Stellar Structure in Galaxies (S4G) were measured at 3.6mu, where extinction is small and the old stars dominate. The…
The Effects of X-Ray Feedback from AGN on Host Galaxy Evolution
D. Clay Hambrick, Jeremiah P. Ostriker, Thorsten Naab +1
Hydrodynamic simulations of galaxies with active galactic nuclei (AGN) have typically employed feedback that is purely local: i.e., an injection of energy to the immediate neighbor…
Massive black hole binary eccentricity in rotating stellar systems
Alberto Sesana, Alessia Gualandris, Massimo Dotti
In this letter we study the eccentricity evolution of a massive black hole (MBH) binary (MBHB) embedded in a rotating stellar cusp. Following the observation that stars on counter-…
The oxygen vs. sodium (anti)correlation(s) in omega Cen
F. D'Antona, A. D'Ercole, A. F. Marino +3
Recent exam of large samples of omega Cen giants shows that it shares with mono-metallic globular clusters the presence of the sodium versus oxygen anticorrelation, within each sub…
Faraday caustics: Singularities in the Faraday spectrum and their utility as probes of magnetic field properties
M. R. Bell, H. Junklewitz, T. A. Enßlin
We describe singularities in the distribution of polarized intensity as a function of Faraday depth (i.e. the Faraday spectrum) caused by line-of-sight (LOS) magnetic field reversa…