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http://hdl.handle.net/20.500.12386/23069| Title: | The old, metal-poor, anticentre open cluster Trumpler 5 | Authors: | Donati, P. Cocozza, G. BRAGAGLIA, Angela PANCINO, ELENA Cantat-Gaudin, T. CARRERA, JIMENEZ RICARDO JESUS TOSI, Monica |
Issue Date: | 2015 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 446 | Issue: | 2 | First Page: | 1411 | Abstract: | As part of a long-term programme, we analyse the evolutionary status and properties of the old and populous open cluster Trumpler 5 (Tr 5), located in the Galactic anticentre direction, almost on the Galactic plane. Tr 5 was observed with Wide Field Imager@MPG/ESO Telescope using the Bessel U, B, and V filters. The cluster parameters have been obtained using the synthetic colour-magnitude diagram (CMD) method, i.e. the direct comparison of the observational CMD with a library of synthetic CMDs generated with different stellar evolution sets (Padova, FRANEC, and FST). Age, reddening, and distance are derived through the synthetic CMD method using stellar evolutionary models with subsolar metallicity (Z = 0.004 or Z = 0.006). Additional spectroscopic observations with Ultraviolet VLT Echelle Spectrograph@Very Large Telescope of three red clump stars of the cluster were used to determine more robustly the chemical properties of the cluster. Our analysis shows that Tr 5 has subsolar metallicity, with [Fe/H] = -0.403 ± 0.006 dex (derived from spectroscopy), age between 2.9 and 4 Gyr (the lower age is found using stellar models without core overshooting), reddening E(B - V) in the range 0.60-0.66 mag complicated by a differential pattern (of the order of ̃±0.1 mag), and distance modulus (m - M)<SUB>0</SUB> = 12.4 ± 0.1 mag. | Acknowledgments: | We thank Paolo Montegriffo (INAF-Osservatorio Astronomico di Bologna, Italy) for his software CataPack, Alessio Mucciarelli for his help with gala , and Michele Cignoni for useful discussions. This research has made use of National Aeronautics and Space Administration (NASA) Astrophysics Data System, the SIMBAD data base and Aladin (operated at CDS, Strasbourg, France), and the WEBDA data base (originally developed by J.-C. Mermilliod, now operated at the Department of Theoretical Physics and Astrophysics of the Masaryk University, Brno). This research has been partially funded by MIUR and INAF (grants ‘The Chemical and Dynamical Evolution of the Milky Way and Local Group Galaxies’, prot. 2010LY5N2T; grant ‘Premiale VLT 2012’). DSS was produced at the Space Telescope Science Institute under US Government grant NAGW-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions), and the Guide Star Catalogue-II (GSC II is a joint project of the Space Telescope Science Institute) and the Osservatorio Astronomico di Torino. Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the US Department of Energy, the NASA, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS website is http://www.sdss.org/ . The SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions. The Participating Institutions are the American Museum of Natural History, Astrophysical Institute Potsdam, University of Basel, University of Cambridge, Case Western Reserve University, University of Chicago, Drexel University, Fermilab, the Institute for Advanced Study, the Japan Participation Group, Johns Hopkins University, the Joint Institute for Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, Ohio State University, University of Pittsburgh, University of Portsmouth, Princeton University, the United States Naval Observatory, and the University of Washington. | URI: | http://hdl.handle.net/20.500.12386/23069 | URL: | https://academic.oup.com/mnras/article/446/2/1411/2892313?searchresult=1 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stu2162 | Bibcode ADS: | 2015MNRAS.446.1411D | Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista |
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| stu2162.pdf | 1.51 MB | Adobe PDF | View/Open |
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