2020RNAAS...4..224K

Query : 2020RNAAS...4..224K

2020RNAAS...4..224K - Research Notes of the AAS, 4, 224 (2020/December-0)

Distance and Tangential Velocity of the Main Ionizing Star in the North America/Pelican Nebulae with Gaia EDR3.

KUHN M.A. and HILLENBRAND L.A.

Abstract (from CDS):

The Bajamar Star is an early O star that ionizes the North America/Pelican Nebulae. In projection, it is near the geometric center of the H II region, but appears to lie outside any of the main stellar subgroups. Furthermore, in Gaia DR2, there were slight discrepancies between this star and the rest of the system in parallax (2σ larger) and relative tangential velocity (∼6 km s–1). Using Gaia EDR3, we find that the parallax discrepancy has disappeared, but the velocity difference remains. These results are consistent with the star having escaped from a subgroup.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): O stars - Star forming regions - Stellar associations - Astrometry - Stellar kinematics

Simbad objects: 5

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Number of rows : 5
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 IC 5070 HII 20 51.0 +44 22           ~ 218 1
2 1RXS J205549.4+435216 Y*O 20 55 51.2556248952 +43 52 24.463877376   16.059 13.087 11.850   O3.5III(f*)+O8 30 1
3 HD 199579 Y*O 20 56 34.7779063080 +44 55 29.000891928 5.16 6.01 5.96     O6.5V((f))z 375 0
4 NAME Gulf of Mexico DNe 20 56.8 +43 52           ~ 53 0
5 NGC 7000 Cl* 20 58 47 +44 19.8           ~ 427 0

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