Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Ivan R. King"'
Autor:
Mattia Libralato, Andrea Bellini, Enrico Vesperini, Giampaolo Piotto, Antonino P. Milone, Roeland P. van der Marel, Jay Anderson, Antonio Aparicio, Beatriz Barbuy, Luigi R. Bedin, Luca Borsato, Santi Cassisi, Emanuele Dalessandro, Francesco R. Ferraro, Ivan R. King, Barbara Lanzoni, Domenico Nardiello, Sergio Ortolani, Ata Sarajedini, Sangmo Tony Sohn
Publikováno v:
The Astrophysical Journal
A number of studies based on data collected by the $\textit{Hubble Space Telescope}$ ($\textit{HST}$) GO-13297 program "HST Legacy Survey of Galactic Globular Clusters: Shedding UV Light on Their Populations and Formation" have investigated the photo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d29dd61ef059199f829b795cd6fea9de
Autor:
Santi Cassisi, Enrico Vesperini, Leandro Kerber, Eduardo Luiz Damiani Bica, Domenico Nardiello, F. F. S. Maia, R. A. P. Oliveira, Mattia Libralato, Ata Sarajedini, Francesca D'Antona, Susana O. Souza, Anna F. Marino, Jonathan Anderson, Beatriz Barbuy, Giampaolo Piotto, Adriano Pietrinferni, Luigi R. Bedin, Sergio Ortolani, Alvio Renzini, E. P. Lagioia, Ivan R. King, Thomas M. Brown, Angeles Pérez-Villegas, R. P. van der Marel, Antonio Aparicio, Antonino Milone
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, 2020, 891, ⟨10.3847/1538-4357/ab6f76⟩
The Astrophysical Journal, 2020, 891, ⟨10.3847/1538-4357/ab6f76⟩
In the present work we analyzed seven globular clusters selected from their location in the Galactic bulge and with metallicity values in the range $-1.30\lesssim\rm{[Fe/H]}\lesssim-0.50$. The aim of this work is first to derive cluster ages assuming
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35bc44f4edea4137d2e4d85e86e642c7
https://hal-insu.archives-ouvertes.fr/insu-03667123
https://hal-insu.archives-ouvertes.fr/insu-03667123
Autor:
Thomas M. Brown, Santi Cassisi, V. Granata, Jonathan Anderson, Domenico Nardiello, Giampaolo Piotto, Ata Sarajedini, R. P. van der Marel, Sebastian L. Hidalgo, Sergio Ortolani, Ivan R. King, Luigi R. Bedin, Adrienne M. Cool, Antonino Milone, Andrea Bellini, Antonio Aparicio, Mario Soto
The Hubble Space Telescope (HST) UV Legacy Survey of Galactic Globular Clusters (GO-13297) has been specifically designed to complement the existing F606W and F814W observations of the Advanced Camera for Surveys (ACS) Globular Cluster Survey (GO-107
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db8d82ca3f9db18e0a1b8fb8b0c7d186
http://hdl.handle.net/20.500.12386/30159
http://hdl.handle.net/20.500.12386/30159
Autor:
Santi Cassisi, Joseph M. Anderson, Maurizio Salaris, Giampaolo Piotto, Luigi R. Bedin, Ivan R. King
Publikováno v:
The Astrophysical Journal. 708:L32-L35
We use 10 orbits of Advanced Camera for Surveys observations to reach the end of the white dwarf cooling sequence in the solar-metallicity open cluster NGC 2158. Our photometry and completeness tests show that the end falls at magnitude m_F606W = 27.
Autor:
Maurizio Salaris, Luigi R. Bedin, Ivan R. King, Giampaolo Piotto, Jay Anderson, Santi Cassisi, Aldo Serenelli
Publikováno v:
The Astrophysical Journal. 678:1279-1291
We present new observations of the white dwarf sequence of the old open cluster NGC 6791. The brighter peak previously observed in the white dwarf luminosity function (WDLF) is now better delineated, and the second, fainter peak that we suggested ear
Autor:
Jarrod R. Hurley, Gregory G. Fahlman, Ivan R. King, Jasonjot S. Kalirai, Jay Anderson, R. Michael Rich, Harvey B. Richer, Brad M. S. Hansen, Peter B. Stetson
Publikováno v:
The Astronomical Journal. 135:2114-2128
We describe here the reduction methods that we developed to study the faintest red dwarfs and white dwarfs in an outer field of NGC6397, which was observed by \hst for 126 orbits in 2005. The particular challenge of this data set is that the faintest
Autor:
Gregory G. Fahlman, Ivan R. King, S. Davis, Brad M. S. Hansen, Aaron Dotter, Jarrod R. Hurley, Harvey B. Richer, Jason S. Kalirai, Nathaniel Paust, Michael M. Shara, Jay Anderson, R. Michael Rich
Publikováno v:
The Astronomical Journal. 135:2141-2154
We present the CMD from deep HST imaging in the globular cluster NGC 6397. The ACS was used for 126 orbits to image a single field in two colors (F814W, F606W) 5 arcmin SE of the cluster center. The field observed overlaps that of archival WFPC2 data
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
Autor:
David L. Nidever, Jay Anderson, Steven R. Majewski, Brian Chaboyer, Luigi R. Bedin, Antonio Marín-Franch, Alfred Rosenberg, I. Neill Reid, Antonio Aparicio, Ivan R. King, Aaron Dotter, Michael H. Siegel, Ata Sarajedini, Giampaolo Piotto
Publikováno v:
Scopus-Elsevier
We present new Hubble Space Telescope photometry of the massive globular cluster M54 (NGC 6715) and the superposed core of the tidally disrupted Sagittarius (Sgr) dSph galaxy as part of the ACS Survey of Galactic Globular Clusters. Our deep (F606W~26
Autor:
Ivan R. King
Publikováno v:
Proceedings of the International Astronomical Union. 3:131-140
Although the overall dynamics of globular clusters involves many complexities, much of their dynamics can be understood on the basis of some simple and straightforward physical arguments. Those arguments are presented here, in an effort to lead the r