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- Lawrence Berkeley National LaboratoryUS199 papers
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9 papers · 2 filters
Globular Clusters as Probes of the Virgo gE NGC 4472
Terry Bridges, Keith Ashman, Mike Beasley +4
We present radial velocities for 144 globular clusters around the Virgo gE NGC 4472 (M49), and ages and metallicities from co-added spectra of 131 clusters. We confirm our earlier…
Ultra-High-Density Molecular Core and Warped Nuclear Disk in the Deep Potential of Radio-Lobe Galaxy NGC 3079
Y. Sofue, J. Koda, K. Kohno +4
We have performed high-resolution synthesis observations of the 12CO (J=1-0) line emission from the radio lobe edge-on spiral NGC 3079 using a 7-element mm-wave interferometer at N…
Dynamical Constraints on the Formation of NGC 4472 and Its Globular Clusters
Stephen E. Zepf, Michael A. Beasley, Terry J. Bridges +4
We present new radial velocities for 87 globular clusters around the elliptical galaxy NGC 4472, and combine these with our previously published data to create a data set of veloci…
Multiresolution Analysis of Substructure in Dark Matter Halos
Michael D. Seymour, Lawrence M. Widrow
Multiresolution analysis is applied to the problem of halo identification in cosmological N-body simulations. The procedure makes use of a discrete wavelet transform known as the a…
Radio Jet-blown Neutral Hydrogen Supershells in Spiral Galaxies?
Gopal-Krishna, Judith A. Irwin
Taking a clue from the pair of HI supershells found in the Scd galaxy NGC 3556 (M 108), we propose a new mechanism for the origin of HI supershells in gas-rich massive galaxies. In…
Ages and Metallicities of Globular Clusters in NGC 4472
M. A. Beasley, R. M. Sharples, T. J. Bridges +4
We have derived ages and metallicities from co-added spectra of 131 globular clusters associated with the giant elliptical galaxy NGC 4472. Based upon a calibration with Galactic g…