OB associations are unbound groups of young stars made prominent by their bright OB
members, and have long been thought to be the expanded remnants of dense star clusters …

We present an analysis of spectroscopic and astrometric data from APOGEE-2 and Gaia
DR2 to identify structures toward the Orion Complex. By applying a hierarchical clustering …

We present a study of the three dimensional structure, kinematics, and age distribution of the
Orion OB association, based on the second data release of the Gaia satellite (Gaia DR2) …

We present the first study of the three-dimensional (3D) dynamics of the gas in the entire
southern Orion cloud complex. We used the parallaxes and proper motions of young stellar …

We present results of our large-scale, optical, multi-epoch photometric survey across∼ 180
square degrees in the Orion OB1 association, complemented with extensive follow-up …

We present a phase-space study of two stellar groups located at the core of the Orion
Complex: Briceño-1 and Orion Belt Population-near (OBP-near). We identify the groups with …

Barnard's Loop is a famous arc of Hα emission located in the Orion star-forming region.
Here, we provide evidence of a possible formation mechanism for Barnard's Loop and …

Context. The Baade-Wesselink (BW) method, which combines linear and angular diameter
variations, is the most common method to determine the distances to pulsating stars …

In this work we use the first data release of the Gaia mission to explore the three-
dimensional arrangement and age ordering of the many stellar groups toward the Orion OB …

We test the ability of two unsupervised machine learning algorithms, EnLink and Shared
Nearest Neighbor (SNN), to identify stellar groupings in the Orion star-forming complex as …