Search Results - "Rich, M R"

A new model for the Milky Way bar by Wang, Yougang, Zhao, Hongsheng, Mao, Shude, Rich, R. M.

“…We use Schwarzschild's orbit-superposition technique to construct self-consistent models of the Galactic bar. Using χ2 minimization, we find that the…”
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THE AGE OF THE YOUNG BULGE-LIKE POPULATION IN THE STELLAR SYSTEM TERZAN 5: LINKING THE GALACTIC BULGE TO THE HIGH-Z UNIVERSE by Ferraro, F R, Massari, D, Dalessandro, E, Lanzoni, B, Origlia, L, Rich, R M, Mucciarelli, A

“…The Galactic bulge is dominated by an old, metal-rich stellar population. The possible presence and the amount of a young (a few gigayears old) minor component…”
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Detailed Abundances in the Galactic Center: Evidence of a Metal-rich Alpha-enhanced Stellar Population by Thorsbro, B., Ryde, N., Rich, R. M., Schultheis, M., Renaud, F., Spitoni, E., Fritz, T. K., Mastrobuono-Battisti, A., Origlia, L., Matteucci, F., Schödel, R.

“…We present a detailed study of the composition of 20 M giants in the Galactic center with 15 of them confirmed to be in the nuclear star cluster. As a control…”
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The cluster Terzan 5 as a remnant of a primordial building block of the Galactic bulge by Ferraro, F. R, Dalessandro, E, Mucciarelli, A, Beccari, G, Rich, R. M, Origlia, L, Lanzoni, B, Rood, R. T, Valenti, E, Bellazzini, M, Ransom, S. M, Cocozza, G

“…Globular star clusters are compact and massive stellar systems old enough to have witnessed the entire history of our Galaxy, the Milky Way. Although recent…”
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CECI N'EST PAS A GLOBULAR CLUSTER: THE METALLICITY DISTRIBUTION OF THE STELLAR SYSTEM TERZAN 5 by Massari, D, Mucciarelli, A, Ferraro, F R, ORIGLIA, L, Rich, R M, Lanzoni, B, Dalessandro, E, Valenti, E, Ibata, R, LOVISI, L, Bellazzini, M, Reitzel, D

“…We present new determinations of the iron abundance for 220 stars belonging to the stellar system Terzan 5 in the Galactic bulge. The spectra have been…”
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Formation of the Andromeda giant stream: asymmetric structure and disc progenitor by Kirihara, T, Miki, Y, Mori, M, Kawaguchi, T, Rich, R M

“…We focus on the evidence of a past minor merger discovered in the halo of the Andromeda galaxy (M31). Previous N-body studies have enjoyed moderate success in…”
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An Intermediate-Mass Black Hole in the Globular Cluster G1: Improved Significance from New Keck and Hubble Space Telescope Observations by Gebhardt, Karl, Rich, R. M, Ho, Luis C

“…We present dynamical models for the massive globular cluster G1. The goal is to measure or place a significant upper limit on the mass of any central black…”
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An age difference of two billion years between a metal-rich and a metal-poor globular cluster by Hansen, B. M. S., Kalirai, J. S., Anderson, J., Dotter, A., Richer, H. B., Rich, R. M., Shara, M. M., Fahlman, G. G., Hurley, J. R., King, I. R., Reitzel, D., Stetson, P. B.

“…An absolute age of about ten billion years is determined for the globular cluster 47 Tucanae, which is about two billion years younger than the cluster NGC…”
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High-resolution near-infrared spectra of NGC 6624 and 6569 by Valenti, E., Origlia, L., Rich, R. M.

“…We present the first abundance analysis based on high-resolution infrared (IR) echelle spectra of NGC 6569 and 6624, two moderately reddened globular clusters…”
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New Density Profile and Structural Parameters of the Complex Stellar System Terzan 5 by Lanzoni, B, Ferraro, F. R, Dalessandro, E, Mucciarelli, A, Beccari, G, Miocchi, P, Bellazzini, M, Rich, R. M, Origlia, L, Valenti, E, Rood, R. T, Ransom, S. M

“…Terzan 5 is a globular cluster-like stellar system in the Galactic bulge which has been recently found to harbor two stellar populations with different iron…”
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Evidence against Anomalous Compositions for Giants in the Galactic Nuclear Star Cluster by Thorsbro, B., Ryde, N., Schultheis, M., Hartman, H., Rich, R. M., Lomaeva, M., Origlia, L., Jönsson, H.

“…Very strong Sc i lines have recently been found in cool M giants in the Nuclear Star Cluster (NSC) in the Galactic center. Interpreting these as anomalously…”
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Variable Stars in Terzan 5: Additional Evidence of Multi-age and Multi-iron Stellar Populations by Origlia, L., Mucciarelli, A., Fiorentino, G., Ferraro, F. R., Dalessandro, E., Lanzoni, B., Rich, R. M., Massari, D., Contreras Ramos, R., Matsunaga, N.

“…Terzan 5 is a complex stellar system in the Galactic bulge, harboring stellar populations (SPs) with very different iron content (Δ[Fe/H] ∼ 1 dex) and with…”
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A Wide Metallicity Range for Gyr-old Stars in the Nuclear Star Cluster by Thorsbro, B., Forsberg, R., Kordopatis, G., Mastrobuono-Battisti, A., Church, R. P., Rich, R. M., Ryde, N., Schultheis, M., Nishiyama, S.

“…We report metallicities for three ∼Gyr-old stars in the Milky Way nuclear star cluster (NSC) using high-resolution near-infrared spectroscopy. We derive…”
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The correlation of star formation quenching with internal galaxy properties and environment by Kimm, Taysun, Somerville, Rachel S., Yi, Sukyoung K., Van Den Bosch, Frank C., Salim, Samir, Fontanot, Fabio, Monaco, Pierluigi, Mo, Houjun, Pasquali, Anna, Rich, R. M., Yang, Xiaohu

“…We investigate the correlation of star formation quenching with internal galaxy properties and large-scale environment (halo mass) in empirical data and…”
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A tidally distorted dwarf galaxy near NGC 4449 by Rich, R. M., Collins, M. L. M., Black, C. M., Longstaff, F. A., Koch, A., Benson, A., Reitzel, D. B.

“…A dwarf galaxy companion to NGC 4449 is reported, and is found to be in a transient stage of tidal disruption. Aftermath of an intergalactic collision The…”
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A Double Main Sequence in the Globular Cluster NGC 6397 by Milone, A. P, Marino, A. F, Piotto, G, Bedin, L. R, Anderson, J, Aparicio, A, Cassisi, S, Rich, R. M

“…High-precision multi-band Hubble Space Telescope (HST) photometry reveals that the main sequence of the globular cluster NGC 6397 splits into two components,…”
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THE MASSES OF LOCAL GROUP DWARF SPHEROIDAL GALAXIES: THE DEATH OF THE UNIVERSAL MASS PROFILE by Collins, Michelle L M, Chapman, Scott C, Rich, R M, Ibata, Rodrigo A, Martin, Nicolas F, Irwin, Michael J, Bate, Nicholas F, Lewis, Geraint F, PENARRUBIA, JORGE, Arimoto, Nobuo, Casey, Caitlin M, Ferguson, Annette M N, Koch, Andreas, McConnachie, Alan W, Tanvir, Nial

“…We investigate the claim that all dwarf spheroidal galaxies (dSphs) reside within halos that share a common, universal mass profile as has been derived for…”
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A Slowly Precessing Disk in the Nucleus of M31 as the Feeding Mechanism for a Central Starburst by Lockhart, K. E., Lu, J. R., Peiris, H. V., Rich, R. M., Bouchez, A., Ghez, A. M.

“…We present a kinematic study of the nuclear stellar disk in M31 at infrared wavelengths using high spatial resolution integral field spectroscopy. The spatial…”
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DETAILED ABUNDANCE ANALYSIS OF A METAL-POOR GIANT IN THE GALACTIC CENTER by Ryde, N., Fritz, T. K., Rich, R. M., Thorsbro, B., Schultheis, M., Origlia, L., Chatzopoulos, S.

“…ABSTRACT We report the first results from our program to examine the metallicity distribution of the Milky Way nuclear star cluster connected to Sgr A*, with…”
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PROPER MOTIONS IN TERZAN 5: MEMBERSHIP OF THE MULTI-IRON SUBPOPULATIONS AND FIRST CONSTRAINT ON THE ORBIT by Massari, D, Dalessandro, E, Ferraro, F R, Miocchi, P, Bellini, A, Origlia, L, Lanzoni, B, Rich, R M, Mucciarelli, A

“…By exploiting two sets of high-resolution images obtained with the Hubble Space Telescope Advanced Camera for Surveys/Wide Field Channel over a baseline of ~…”
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