2019AJ....157..200Z

Query : 2019AJ....157..200Z

2019AJ....157..200Z - Astron. J., 157, 200-200 (2019/May-0)

Parallaxes for star-forming regions in the inner Perseus spiral arm.

ZHANG B., REID M.J., ZHANG L., WU Y., HU B., SAKAI N., MENTEN K.M., ZHENG X., BRUNTHALER A., DAME T.M. and XU Y.

Abstract (from CDS):

We report trigonometric parallax and proper motion measurements of 6.7 GHz CH3OH and 22 GHz H2O masers in eight high-mass star-forming regions (HMSFRs) based on Very Long Baseline Array (VLBA) observations as part of the Bar and Spiral Structure Legacy (BeSSeL) Survey. The distances of these HMSFRs combined with their Galactic coordinates, radial velocities, and proper motions, allow us to assign them to a segment of the Perseus arm with l <= 70°. These HMSFRs are clustered in Galactic longitude from ≃30° to ≃50° neighboring a dearth of such sources between longitudes ≃50° to ≃90°.

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

Journal keyword(s): astrometry - Galaxy: fundamental parameters - Galaxy: kinematics and dynamics - masers - stars: formation - techniques: high angular resolution

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
2 W 49n HII 19 10 13.2 +09 06 12           ~ 497 3

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