SIMBAD references

2019ApJ...871L..12R - Astrophys. J., 871, L12-L12 (2019/January-3)

Evidence of Hubble flow-like motion of young stellar populations away from the Perseus Arm.

ROMAN-ZUNIGA C.G., ROMAN-LOPES A., TAPIA M., HERNANDEZ J. and RAMIREZ-PRECIADO V.

Abstract (from CDS):

In this Letter we present evidence of the coherent outward motion of a sample of young stars (t < 30 Myr) in the Perseus Arm, whose apparent origin is located in the vicinity of the W3/W4/W5 complex. Using astrometric and photometric data from the Gaia Data Release 2 catalog of an 8* radius field centered near W4, we selected a sample of young intermediate- to high-mass star candidates. The sample is limited to sources with parallax uncertainties below 20% and Bayesian distance estimates within 1800 and 3100 pc. The selection includes embedded stellar populations as well as young open clusters. Projected velocities derived from perspective-corrected proper motions clearly suggest that the young star population emerged from the Perseus Arm, with a possible convergence zone near W3/W4/W5 region, tracing a front that expands away at a rate of about 15kms–1kpc–1.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: kinematics and dynamics - open clusters and associations: general - stars: kinematics and dynamics - stars: massive

Simbad objects: 18

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2019.10.22-04:29:54

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