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

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arxiv 1507.03230 v1 pith:DDUAFQQG submitted 2015-07-12 astro-ph.SR astro-ph.GA

G.M. De Silva , G. Carraro , V. D'Orazi , V. Efremova , H. Macpherson , S. Martell , L. Rizzo This is my paper · ORCID
classification astro-ph.SRastro-ph.GA
keywords trumplerclusterscommonabundancesbinaryfoundhighmilky
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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 for NGC 5617 and -38.46 +/-2.08 km/s 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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 23 citations worldwide. Full citation record

  1. White dwarf planets in star clusters: gravitational scattering versus mass-loss effects

    astro-ph.EP 2026-06 unverdicted novelty 5.0 of 10

    N-body simulations find stellar mass-loss effects dominate gravitational scattering in altering giant planet orbits around white dwarfs formed in star clusters, independent of density and initial conditions.

  2. Planet or brown dwarf? Constraints on the formation of H-type objects in IC348

    astro-ph.EP 2026-06 unverdicted novelty 4.0 of 10

    H-type objects in IC348 show spatial distributions matching stars and brown dwarfs, unlike the more dispersed distribution of simulated ejected planets, indicating a star-like formation origin.

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