Triggered Star Formation on the Border of the Orion-Eridanus Superbubble

Abstract

A census of classical T Tauri stars and Herbig Ae/Be stars has been performed around the Orion-Eridanus Superbubble which is ionized and created by the Ori OB1 association. This sample is used to study the spatial distribution of newborn stars, hence the recent star formation sequence, in the region that includes two giant molecular clouds (Orion A and B) and additional smaller clouds (NGC 2149, GN 05.51.4, VdB 64, the Crossbones, the Northern Filament, LDN 1551, LDN 1558, and LDN 1563). Most of the molecular clouds are located on the border of the Superbubble, and associated with H-alpha filaments and star formation activity, except the Northern Filament which is probably located outside the Superbubble. This suggests that while star formation progresses from the oldest Ori OB1a subgroup to 1b, 1c and 1d, the Superbubble compresses and initiates starbirth in clouds such as NGC 2149, GN 05.51.4, VdB 64, and the Crossbones, which are located more than one hundred pc away from the center of the Superbubble, and even in clouds some two hundred pc away, i.e., in LDN 1551, LDN 1558, and LDN 1563. A superbubble appears to have potentially a long-range influence in triggering next-generation star formation in an OB association.

Accepted for publication in ApJ

References in corpus (7)

• Spitzer observations of the Orion OB1 association: disk census in the low mass stars
• The Spatial Distribution of Brown Dwarfs in Taurus
• A kinematic study of the Taurus-Auriga T association
• A large scale extinction map of the Galactic Anticenter from 2MASS
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• The "Carina Flare" Supershell: Probing the Atomic and Molecular ISM in a Galactic Chimney
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Cited by in corpus (13)

• 3D dynamics of the Orion cloud complex -- Discovery of coherent radial gas motions at the 100-pc scale
• The Per-Tau Shell: A Giant Star-Forming Spherical Shell Revealed by 3D Dust Observations
• 3D Dust Mapping Reveals that Orion Forms Part of a Large Ring of Dust
• Discovery of Star Formation in the Extreme Outer Galaxy Possibly Induced by a High-velocity Cloud Impact
• Signs of late infall and possible planet formation around DR Tau using VLT/SPHERE and LBTI/LMIRCam
• A 3D View of Orion: I. Barnard's Loop
• Steady-state nucleosynthesis throughout the Galaxy
• New detections of embedded clusters in the Galactic halo
• Kompaneets Model Fitting of the Orion-Eridanus Superbubble
• Young Stellar Object candidates toward the Orion region selected from GALEX
• ASKAP EMU Radio Detection of the Reflection Nebula VdB-80 in the Monoceros Crossbones Filamentary Structure
• The interaction of hydrodynamic shocks with self-gravitating clouds
• Dippers from TESS Full-frame Images. II. Spectroscopic Characterization of Four Young Dippers