A deep look into the core of young clusters* II. λ-Orionis

@article{Bouy2009ADL,
  title={A deep look into the core of young clusters* II. $\lambda$-Orionis},
  author={Herv'e Bouy and Nuria Hu{\'e}lamo and David Barrado y Navascu{\'e}s and E. L. Mart{\'i}n and Monika G. Petr-Gotzens and Johann Kolb and Enrico Marchetti and M. Morales-Calder{\'o}n and Amelia Bayo and {\'E}tienne Artigau and Markus Hartung and Franck Marchis and Motohide Tamura and Michael Sterzik and Rainer Koehler and Valentin D. Ivanov and Dieter E. A. Nuernberger},
  journal={Astronomy and Astrophysics},
  year={2009},
  volume={504},
  pages={199-209}
}
Context. Over the past years, theλ−Orionis cluster has been a prime location for the study of young very low mass stars, substellar and isolated planetary mass objects and the determination of the initial mass function and other properties of low mass cluster members. Aims. In the continuity of our previous studies of young associati ons cores, we search for ultracool members and new multiple systems within the central 5. ′ 3 (≈0.6 pc) of the cluster. Methods. We obtained deep seeing limited J… 
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XMM-Newton observations of the young open cluster around λ Orionis ,
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XMM-Newton investigations of the Lambda Orionis star-forming region (XILO) - I. The young cluster Collinder 69
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HH 175 is an isolated Herbig–Haro object seen towards the B35 cloud in the λ Ori region. We use deep Subaru 8 m interference filter images and Spitzer images to show that HH 175 is a terminal shock
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By collecting optical and infrared photometry and low-resolution spectroscopy, we have identified a large number of low-mass stars and brown dwarf candidates belonging to the young cluster (~5 Myr)
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We present multiwavelength optical and IR photometry of 170 previously known low-mass stars and brown dwarfs of the 5 Myr Collinder 69 cluster (λ Orionis). The new photometry supports cluster
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The λ Ori star-forming region presents a snapshot of a moderate-mass giant molecular cloud 1–2 Myr after cloud disruption by OB stars, with the OB stars, the low-mass stellar population, remnant
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We present VRI photometry of 320,917 stars with 11 R 18 throughout the λ Ori star-forming region. Using the more spatially limited spectroscopic surveys of Dolan & Mathieu to define the
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We have found 72 premain-sequence (PMS) stars near the center of the j Orionis star-forming region by spectroscopically testing a magnitude-limited sample for the presence of lithium j6708
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Aims. We look for wide, faint companions around members of the 5 Myr Lambda Orionis open cluster. Methods. We used optical, near-infrared, and Spitzer/IRAC photometry. Results. We report the
FLAMES spectroscopy of low-mass stars in the young clusters σ Ori and λ Ori ,
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We present the results of a near-infrared adaptive optics survey with the aim to detect close companions to Hipparcos members in the three subgroups of the nearby OB association Sco OB2: Upper
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