Výsledky vyhledávání - "David B. Reitzel"

The Extended Star Formation History of the Andromeda Spheroid at 35 kpc on the Minor Axis

Autor: Alvio Renzini, Ed Smith, Masashi Chiba, Henry C. Ferguson, David B. Reitzel, Mikito Tanaka, Thomas M. Brown, Jasonjot S. Kalirai, Yutaka Komiyama, Rachael L. Beaton, Allen V. Sweigart, Steven R. Majewski, Karoline M. Gilbert, R. Michael Rich, Andreas Koch, Masanori Iye, Puragra Guhathakurta

Publikováno v: The Astrophysical Journal. 685:L121-L124

Using the HST ACS, we have obtained deep optical images reaching well below the oldest main sequence turnoff in fields on the southeast minor-axis of the Andromeda Galaxy, 35 kpc from the nucleus. These data probe the star formation history in the ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6c9d606e39c7e30cd71f06e9509202e
https://doi.org/10.1086/592686

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The White Dwarf Cooling Sequence of NGC 6397

Autor: Jarrod R. Hurley, David B. Reitzel, Ivan R. King, Brad M. S. Hansen, J. Brewer, Peter B. Stetson, Aaron Dotter, Jay Anderson, R. Michael Rich, Greg Fahlman, Harvey B. Richer, Jason S. Kalirai, Michael M. Shara

Publikováno v: The Astrophysical Journal. 671:380-401

We present the results of a deep Hubble Space Telescope (HST) exposure of the nearby globular cluster NGC6397, focussing attention on the cluster's white dwarf cooling sequence. This sequence is shown to extend over 5 magnitudes in depth, with an app

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94e850ecb61b2b71f95ca8dc7c4e73b7
https://doi.org/10.1086/522567

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Kinematics and composition of the Galactic bulge: recent progress

Autor: Roberto De Propris, Christian D. Howard, David B. Reitzel, R. Michael Rich, HongSheng Zhao

Publikováno v: Proceedings of the International Astronomical Union. 3:333-338

We present recent results from a Keck study of the composition of the Galactic bulge, as well as results from the bulge Bulge Radial Velocity Assay (BRAVA). Culminating a 10 year investigation, Fulbright, McWilliam, & Rich (2006, 2007) solved the pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7878ee5fa4db4b0e17361bd7a409b666
https://doi.org/10.1017/s174392130801805x

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The Bulge Radial Velocity Assay: Techniques and a Rotation Curve

Autor: R. Michael Rich, HongSheng Zhao, David B. Reitzel, Christian D. Howard

Publikováno v: The Astrophysical Journal. 658:L29-L32

We are undertaking a large scale radial velocity survey of the Galactic bulge which uses M giant stars selected from the 2MASS catalog as targets for the CTIO 4m Hydra multi-object spectrograph. The aim of this survey is to test dynamical models of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5002c2b3115ea1ee895ac5c2c3d44e9
https://doi.org/10.1086/513509

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A New Method for Isolating M31 Red Giant Stars: The Discovery of Stars out to a Radial Distance of 165 kpc

Autor: C. Luine, James C. Ostheimer, David B. Reitzel, Richard J. Patterson, Steven R. Majewski, Puragra Guhathakurta, A. Javier Cenarro, Jasonjot S. Kalirai, Michael C. Cooper, Karoline M. Gilbert, R. Michael Rich

Publikováno v: The Astrophysical Journal. 652:1188-1212

We present a method for isolating a clean sample of red giant stars in the outerregions of the Andromeda spiral galaxy (M31) from an ongoing spectroscopic survey using the DEIMOS instrument on the Keck 10-m telescope. The survey aims to study the kin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c5cabc83603a815bfa0d8dd8e5b4a18
https://doi.org/10.1086/508643

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Keck Spectroscopy of Red Giant Stars in the Vicinity of M31'sMassive Globular Cluster G1

Autor: David B. Reitzel, Puragra Guhathakurta, R. Michael Rich

Publikováno v: The Astronomical Journal. 127:2133-2138

We present results from a Keck spectroscopic survey of red giants in a field near M31's major axis, ~34kpc in projection from the nucleus, near the globular cluster G1. We use multislit LRIS spectroscopy to measure the CaII triplet in 41 stars with a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2330ee3390772093d97a19f7bc79384d
https://doi.org/10.1086/382517

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Isolating Red Giant Stars in M31's Elusive Outer Spheroid

Autor: David B. Reitzel, Andrew Gould, Puragra Guhathakurta

Publikováno v: The Astronomical Journal. 116:707-722

Deep UBRI images of a 15'x15' field in the M31 galaxy's outer spheroid obtained with the KPNO 4-m telescope, and Keck 10-m telescope+LRIS I-band images, are used to isolate candidate red giant branch stars located at R=19 kpc (projected) along the mi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2e5e99330c368136703cedc1b6890eb
https://doi.org/10.1086/300458

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The Bulge Radial Velocity Assay (BRAVA): II. Complete Sample and Data Release

Autor: Kunder, Andrea, Wang, Yougang, Robin, Annie, Shen, Juntai, Johnson, Christian, Stubbs, Scott, Howard, Christian, De Propris, Roberto, Rich, R., Koch, Andreas, Kormendy, John, Soto, Mario, Frinchaboy, Peter, Reitzel, David, Zhao, Hongsheng, Origlia, Livia, Kunder Andreas Koch R. Michael Rich Roberto De Propris Christian D. Howard Scott A. Stubbs Christian I. Johnson Juntai Shen Yougang Wang Annie C. Robin John Kormendy Mario Soto Peter Frinchaboy David B. Reitzel Hongsheng Zhao Livia Origlia, Andrea

Publikováno v: The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2012, 143 (3), pp.57. ⟨10.1088/0004-6256/143/3/57⟩
ASTRONOMICAL JOURNAL
Artículos CONICYT
CONICYT Chile
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We present new radial velocity measurements from the Bulge Radial Velocity Assay (BRAVA), a large scale spectroscopic survey of M-type giants in the Galactic bulge/bar region. The sample of ~4500 new radial velocities, mostly in the region -10 deg <

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e821ac1be58ff265ecebf979c6f767a
https://hal.archives-ouvertes.fr/hal-00676506

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Kinematics at the Edge of the Galactic Bulge: Evidence for Cylindrical Rotation

Autor: Annie C. Robin, HongSheng Zhao, Roger Fux, Ryan Mallery, David B. Reitzel, Roberto De Propris, R. Michael Rich, Will Clarkson, Andreas Koch, Konrad Kuijken, Christian D. Howard, John Kormendy

We present new results from BRAVA, a large scale radial velocity survey of the Galactic bulge, using M giant stars selected from the Two Micron All Sky Survey catalogue as targets for the Cerro Tololo Inter-American Observatory 4m Hydra multi-object

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::566329e0c205e6d8d50447ec288857fd
http://arxiv.org/abs/0908.1109

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Stellar Evolution in NGC 6791: Mass Loss on the Red Giant Branch and the Formation of Low Mass White Dwarfs

Autor: Daniel D. Kelson, Harvey B. Richer, Brad M. S. Hansen, Pierre Bergeron, Jasonjot S. Kalirai, David B. Reitzel, R. Michael Rich

We present the first detailed study of the properties (temperatures, gravities, and masses) of the NGC 6791 white dwarf population. This unique stellar system is both one of the oldest (8 Gyr) and most metal-rich ([Fe/H] ~ 0.4) open clusters in our G

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6e1a3c0a715a8e832ae288db7fc8e4c
http://arxiv.org/abs/0705.0977

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