Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22

Using photometry and high resolution spectroscopy we investigate for the first time the physical connection between the open clusters NGC 5617 and Trumpler 22. Based on new CCD photometry we report their spatial proximity and common age of ~70 Myr. Based on high resolution spectra collected using th...

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Detalles Bibliográficos
Autores principales: De Silva, G. M., Carraro, Giovanni, D'Orazi, Valentina, Efremova, V., Macpherson, Hayley J., Martell, Sarah L., Rizzo, Lucía
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126138
Aporte de:
id I19-R120-10915-126138
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
open clusters and associations: general
open clusters and associations: individual: NGC 5617
open clusters and associations: individual: Trumpler 22
spellingShingle Astronomía
open clusters and associations: general
open clusters and associations: individual: NGC 5617
open clusters and associations: individual: Trumpler 22
De Silva, G. M.
Carraro, Giovanni
D'Orazi, Valentina
Efremova, V.
Macpherson, Hayley J.
Martell, Sarah L.
Rizzo, Lucía
Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
topic_facet Astronomía
open clusters and associations: general
open clusters and associations: individual: NGC 5617
open clusters and associations: individual: Trumpler 22
description Using photometry and high resolution spectroscopy we investigate for the first time the physical connection between the open clusters NGC 5617 and Trumpler 22. Based on new CCD photometry we report their spatial proximity and common age of ~70 Myr. Based on high resolution spectra collected using the HERMES and UCLES spectrographs on the Anglo-Australian telescope, we present radial velocities and abundances for Fe, Na, Mg, Al, Si, Ca and Ni. The measured radial velocities are -38.63 ± 2.25 km s⁻¹ for NGC 5617 and -38.46 ± 2.08 km s⁻¹ for Trumpler 22. The mean metallicity of NGC 5617 was found to be [Fe/H] = -0.18 ± 0.02 and for Trumpler 22 was found to be [Fe/H] = -0.17 ± 0.04. The two clusters share similar abundances across the other elements, indicative of a common chemical enrichment history of these clusters. Together with common motions and ages we confirm that NGC 5617 and Trumpler 22 are a primordial binary cluster pair in the Milky Way.
format Articulo
Articulo
author De Silva, G. M.
Carraro, Giovanni
D'Orazi, Valentina
Efremova, V.
Macpherson, Hayley J.
Martell, Sarah L.
Rizzo, Lucía
author_facet De Silva, G. M.
Carraro, Giovanni
D'Orazi, Valentina
Efremova, V.
Macpherson, Hayley J.
Martell, Sarah L.
Rizzo, Lucía
author_sort De Silva, G. M.
title Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
title_short Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
title_full Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
title_fullStr Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
title_full_unstemmed Binary open clusters in the Milky Way: photometric and spectroscopic analysis of NGC 5617 and Trumpler 22
title_sort binary open clusters in the milky way: photometric and spectroscopic analysis of ngc 5617 and trumpler 22
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/126138
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