Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.6k papers
- University of California, BerkeleyUS2.5k papers
- The Ohio State UniversityUS2.3k papers
- University of ArizonaUS2.1k papers
- Lawrence Berkeley National LaboratoryUS2.1k papers
- SLAC National Accelerator LaboratoryUS2k papers
- University of California, IrvineUS2k papers
- Yale UniversityUS1.9k papers
- University of Wisconsin–MadisonUS1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.9k papers
- McGill UniversityCA1.9k papers
- University of ChicagoUS1.9k papers
28 papers · 2 filters
Evolving Gravitationally Unstable Disks Over Cosmic Time: Implications For Thick Disk Formation
John Forbes, Mark R. Krumholz, Andreas Burkert
Observations of disk galaxies at z~2 have demonstrated that turbulence driven by gravitational instability can dominate the energetics of the disk. We present a 1D simulation code,…
Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy. IV. The Large Magellanic Cloud: , Fe-peak, Light, and Heavy Elements
J. E. Colucci, R. A. Bernstein, S. A. Cameron +1
We present detailed chemical abundances in 8 clusters in the Large Magellanic Cloud (LMC). We measure abundances of 22 elements for clusters spanning a range in age of 0.05 to 12 G…
PSR J2030+3641: radio discovery and gamma-ray study of a middle-aged pulsar in the now identified Fermi-LAT source 1FGL J2030.0+3641
F. Camilo, M. Kerr, P. S. Ray +14
In a radio search with the Green Bank Telescope of three unidentified low Galactic latitude Fermi-LAT sources, we have discovered the middle-aged pulsar J2030+3641, associated with…
Fermi Detection of a Luminous Gamma-ray Pulsar in a Globular Cluster
The Fermi LAT Collaboration
We report the Fermi Large Area Telescope detection of gamma-ray (>100 megaelectronvolts) pulsations from pulsar J1823-3021A in the globular cluster NGC 6624 with high significance…
On the Rarity of X-Ray Binaries with Naked Helium Donors
T. Linden, F. Valsecchi, V. Kalogera
The paucity of known High-Mass X-Ray Binaries (HMXB) with naked He donor stars (hereafter He star) in the Galaxy has been noted over the years as a surprising fact, given the signi…
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…
Evolution of Blister-Type HII Regions in a Magnetized Medium
Leo Gendelev, Mark R. Krumholz
We use the three-dimensional Athena ionizing radiation-magnetohydrodynamics (IRMHD) code to simulate blister-type HII regions driven by stars on the edge of magnetized gas clouds.…
A General Model for the CO-H2 Conversion Factor in Galaxies with Applications to the Star Formation Law
Desika Narayanan, Mark R. Krumholz, Eve C. Ostriker +1
The most common means of converting an observed CO line intensity into a molecular gas mass requires the use of a conversion factor (Xco). While in the Milky Way this quantity does…
Investigation of the errors in SDSS proper-motion measurements using samples of quasars
Ruobing Dong, James Gunn, Gillian Knapp +2
We investigate in detail the probability distribution function (pdf) of the proper-motion measurement errors in the SDSS+USNO-B proper-motion catalog of \citet{mun04} using clean q…
Structure and Population of the NGC55 Stellar Halo from a Subaru/Suprime-Cam Survey
Mikito Tanaka, Masashi Chiba, Yutaka Komiyama +2
As part of our survey of galactic stellar halos, we investigate the structure and stellar populations of the northern outer part of the stellar halo in NGC55, a member galaxy of th…
Observations of Mg II Absorption Near z ~ 1 Galaxies Selected From The DEEP2 Redshift Survey
Elizabeth Lovegrove, Robert A. Simcoe
We study the frequency of Mg II absorption in the outer haloes of galaxies at z = 0.6 - 1.4 (with median z = 0.87), using new spectra obtained of ten background quasars with galaxy…
Resolved photometry of extragalactic young massive star clusters
S. S. Larsen, S. E. de Mink, J. J. Eldridge +6
We present colour-magnitude diagrams (CMDs) for a sample of seven young massive clusters in the galaxies NGC 1313, NGC 1569, NGC 1705, NGC 5236 and NGC 7793. The clusters have ages…
The Global Evolution of Giant Molecular Clouds II: The Role of Accretion
Nathan J. Goldbaum, Mark R. Krumholz, Christopher D. Matzner +1
We present virial models for the global evolution of giant molecular clouds. Focusing on the presence of an accretion flow, and accounting for the amount of mass, momentum, and ene…
The [Fe/H], [C/Fe], and [alpha/Fe] distributions of the Bootes I Dwarf Spheroidal Galaxy
David K. Lai, Young Sun Lee, Michael Bolte +5
We present the results of a low-resolution spectral abundance study of 25 stars in the Bootes I dwarf spheroidal (dSph) galaxy. The data were obtained with the LRIS instrument at K…
On the assembly of the Milky Way dwarf satellites and their common mass scale
Valery Rashkov, Piero Madau, Michael Kuhlen +1
We use a particle tagging technique to dynamically populate the N-body Via Lactea II high-resolution simulation with stars. The method is calibrated using the observed luminosity f…
Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy. III. The Large Magellanic Cloud: Fe and Ages
J. E. Colucci, R. A. Bernstein, S. A. Cameron +1
In this paper we refine our method for the abundance analysis of high resolution spectroscopy of the integrated light of unresolved globular clusters (GCs). This method was previou…
Insight Into the Formation of the Milky Way Through Cold Halo Substructure. II. The Elemental Abundances of ECHOS
Kevin C. Schlaufman, Constance M. Rockosi, Young Sun Lee +2
We determine the average metallicities of the elements of cold halo substructure (ECHOS) that we previously identified in the inner halo of the Milky Way within 17.5 kpc of the Sun…
Formation and Evolution of the Disk System of the Milky Way: [alpha/Fe] Ratios and Kinematics of the SEGUE G-Dwarf Sample
Young Sun Lee, Timothy C. Beers, Deokkeun An +10
We employ measurements of the [alpha/Fe] ratio derived from low-resolution (R~2000) spectra of 17,277 G-type dwarfs from the SEGUE survey to separate them into likely thin- and thi…
Radiation-Hydrodynamic Simulations of the Formation of Orion-Like Star Clusters I. Implications for the Origin of the Initial Mass Function
Mark R. Krumholz, Richard I. Klein, Christopher F. McKee
One model for the origin of typical galactic star clusters such as the Orion Nebula Cluster (ONC) is that they form via the rapid, efficient collapse of a bound gas clump within a…
Reassessing The Fundamentals: New Constraints on the Evolution, Ages and Masses of Neutron Stars
Bulent Kiziltan
The ages and masses of neutron stars (NSs) are two fundamental threads that make pulsars accessible to other sub-disciplines of astronomy and physics. A realistic and accurate dete…
Collapse, outflows and fragmentation of massive, turbulent and magnetized prestellar barotropic cores
P. Hennebelle, B. Commercon, M. Joos +4
Stars and more particularly massive stars, have a drastic impact on galaxy evolution. Yet the conditions in which they form and collapse are still not fully understood. In particul…
Variability and Multiwavelength Detected AGN in the GOODS Fields
Vicki L. Sarajedini, David C. Koo, Alison J. Klesman +3
We identify 85 variable galaxies in the GOODS North and South fields using 5 epochs of HST ACS V-band (F606W) images spanning 6 months. The variables are identified through signifi…
Simple Models of Metal-Line Absorption and Emission from Cool Gas Outflows
J. Xavier Prochaska, Daniel Kasen, Kate Rubin
We analyze the absorption and emission-line profiles produced by a set of simple, cool gas wind models motivated by galactic-scale outflow observations. We implement monte carlo ra…
Radiation-magnetohydrodynamic simulations of HII regions and their associated PDRs in turbulent molecular clouds
S. J. Arthur, W. J. Henney, G. Mellema +2
We present the results of radiation-magnetohydrodynamic simulations of the expansion of HII regions and surrounding photodissociation regions in turbulent, magnetised, molecular cl…