A formation scenario of young stellar groups in the region of the Scorpio Centaurus OB association

Abstract

The main objective of this work is to investigate the role played by Lower Centaurus Crux (LCC) and Upper Centaurus Lupus (UCL), both subcomponents of the Scorpio Centaurus OB association (Sco-Cen), in the formation of the groups beta Pictoris, TW Hydrae and the eta Chamaeleontis cluster. The dynamical evolution of all the stellar groups involved and of the bubbles and shells blown by LCC and UCL are calculated and followed from the past to the present. This leads to a formation scenario in which (1) the groups beta Pictoris, TW Hydrae were formed in the wake of the shells created by LCC and UCL, (2) the young cluster eta Chamaeleontis was born as a consequence of the collision of the shells of LCC and UCL, and (3) the formation of Upper Scorpius (US), the other main subcomponent of the Sco-Cen association, may have been started by the same process that created eta Chamaeleontis.

References in corpus (16)

• A Hipparcos census of the nearby OB associations
• Discovery of seven T Tauri stars and a brown dwarf candidate in the nearby TW Hydrae Association
• Post-T Tauri Stars in the Nearest OB Association
• A Moving Cluster Distance to the Exoplanet 2M1207 B in the TW Hya Association
• Triggered massive-star formation on the borders of Galactic HII regions. I. A search for `collect and collapse' candidates
• Nearby debris disk systems with high fractional luminosity reconsidered
• The Age of Beta Pic
• Triggered massive-star formation on the borders of Galactic HII regions. II. Evidence for the collect and collapse process around RCW 79
• Formation scenarios for the young stellar associations between galactic longitudes l = 280-360 deg
• Hierarchical Triggering of Star Formation by Superbubbles in W3/W4
• The Eta Chamaeleontis Cluster: Origin in the Sco-Cen OB Association
• Interstellar extinction in the direction of the Aquila Rift
• A catalogue of dust clouds in the Galaxy
• Triggered Star Formation by Massive Stars
• Dynamical Evolution of the TW Hya Association
• eta Chameleontis: abnormal initial mass function or dynamical evolution?

Cited by in corpus (15)

• Bayesian analysis to identify new star candidates in nearby young stellar kinematic groups
• The Role of Multiplicity in Disk Evolution and Planet Formation
• BANYAN. III. Radial velocity, Rotation and X-ray emission of low-mass star candidates in nearby young kinematic groups
• The Gemini NICI Planet-Finding Campaign: Discovery of a Close Substellar Companion to the Young Debris Disk Star PZ Tel
• A companion candidate in the gap of the T Cha transitional disk
• Distance and Kinematics of the TW Hydrae Association from Parallaxes
• New low-mass members of the Octans stellar association and an updated 30-40 Myr lithium age
• A large moving group within the Lower Centaurus Crux association
• The debris disk host star HD 61005: a member of the Argus Association?
• The beta Pictoris association: Catalog of photometric rotational periods of low-mass members and candidate members
• Benchmark cool companions: Ages and abundances for the PZ Tel system
• GSH 006-15+7: A local Galactic supershell featuring transition from HI emission to absorption
• Discovery of two nearby post-T Tauri stellar associations
• Reverse dynamical evolution of Eta Chamaeleontis
• RX J0942.7-7726AB: an isolated pre-main sequence wide binary