Origin and possible birthplace of the extreme runaway star HIP 60350

Abstract

Using the recently determined spatial velocity components of the extreme runaway star HIP 60350 and a gravitation potential model of the Galaxy, we integrate the orbit of HIP 60350 back to the plane of the Galaxy. In this way, a possible location of the formation of the star is determined. We estimate the uncertainty of the result due to the uncertainties of the gravitational potential model and the errors in the spatial velocity components. The place of birth lies (within the errors) near the position of the open cluster NGC 3603. However, the ejection event which occured about 20 Myr ago is in contradiction with the cluster mean age of 3-4 Myr. We suggest that it occured at an earlier phase in sequential star formation in that region. We discuss also ejection mechanisms. Due to the rather high mass of the star (about $5 \Msol$), the most probable model is that of dynamical ejection.

arXiv commentAstron. Astrophys. submitted, 7 pages, 5 eps figures

References in corpus (10)

• On the Formation of Massive Stars
• Star Formation in a Crossing Time
• Mass models of the Milky Way
• Galactic Kinematics of Cepheids from Hipparcos Proper Motions
• Turbulent Flow-Driven Molecular Cloud Formation: A Solution to the Post-T Tauri Problem?
• The origin of runaway stars
• Discovery of a bow shock around Vela X-1
• Ring Nebula and Bipolar Outflows Associated with the B1.5 Supergiant Sher #25 in NGC 3603
• NGC 3576 and NGC 3603: Two Luminous Southern HII Regions Observed at High Resolution with the Australia Telescope Compact Array
• Constraints on Stellar-Dynamical Models of the Orion Nebula Cluster

Cited by in corpus (9)

• Detection of Wolf-Rayet stars in host galaxies of Gamma-Ray Bursts (GRBs): are GRBs produced by runaway massive stars ejected from high stellar density regions ?
• On the origin of high-velocity runaway stars
• The Nature of the Hyper-Runaway Candidate HIP 60350
• Spatially-resolved dust properties of the GRB 980425 host galaxy
• The Nearest High-Velocity Stars Revealed by LAMOST Data Release 1
• The origin of early-type runaway stars from open clusters
• Spiral arms and disc stability in the Andromeda galaxy
• Separated before birth: pulsars B2020+28 and B2021+51 as the remnants of runaway stars
• Stellar kinematics using a third integral of motion: method and application on the Andromeda galaxy