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Chemical pattern across the young associations ONC and OB1b
Katia Biazzo, Sofia Randich, Francesco Palla
Context. Abundances of iron-peak and alpha-elements are poorly known in Orion, and the available measurements yield contradictory results. Aims. We measure accurate and homogeneous…
Pre-Main Sequence stars in the star forming complex Sh 2-284
F. Cusano, V. Ripepi, J. M. Alcala +10
Located at the galactic anticenter, Sh 2-284 is a HII region which harbors several young open clusters; Dolidze 25, a rare metal poor (Z~0.004) young cluster, is one of these. Give…
A Multi-color Optical Survey of the Orion Nebula Cluster. II. the H-R diagram
Nicola Da Rio, Massimo Robberto, David R. Soderblom +4
We present a new analysis of the stellar population of the Orion Nebula Cluster (ONC) based on multi-band optical photometry and spectroscopy. We study the color-color diagrams in…
The near-infrared reflected spectrum of source I in Orion-KL
Leonardo Testi, Jonathan C. Tan, Francesco Palla
Source I in the Orion-KL nebula is believed to be the nearest example of a massive star still in the main accretion phase. It is thus one of the best cases for studying the propert…