2013AJ....146..106O


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.28CET17:41:31

2013AJ....146..106O - Astron. J., 146, 106 (2013/November-0)

Kinematics of the Orion Trapezium based on diffracto-astrometry and historical data.

OLIVARES J., SANCHEZ L.J., RUELAS-MAYORGA A., ALLEN C., COSTERO R. and POVEDA A.

Abstract (from CDS):

Using the novel Diffracto-Astrometry technique, we analyze 44 Hubble Space Telescope Wide Field Planetary Camera 2 images of the Orion Trapezium (OT) taken over a span of 12 yr (1995-2007). We measure the relative positions of the six brighter OT components (A-F) and supplement these results with measurements of the relative separations and position angles taken from the literature, thus extending our analysis time base to ∼200 yr. For every pair of components we find the relative rate of separation as well as the temporal rate of change of their position angles, which enable us to determine the relative kinematics of the system. Component E shows a velocity larger than the OT's escape velocity, thus confirming that it is escaping from the gravitational pull of this system.

Abstract Copyright:

Journal keyword(s): astrometry - stars: individual: heta1 Ori - stars: kinematics and dynamics - techniques: high angular resolution

Errata: erratum vol. 152, art. 109 (2016)

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME NCP reg 00 00 00 +90 00.0           ~ 136 0
2 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1924 1
3 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 1962 1
4 * tet01 Ori E SB* 05 35 15.7734880 -05 23 09.871626     11.1     G2IV 85 0
5 * tet01 Ori A Ae* 05 35 15.8252169327 -05 23 14.332546552 5.87 6.75 6.73 6.42 6.21 B0V 457 1
6 * tet01 Ori B Al* 05 35 16.112 -05 23 06.89 7.71 8.20 7.96     B1V 339 2
7 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1263 1
8 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1441 1
9 * tet01 Ori F Em* 05 35 16.72360 -05 23 25.1688 9.928 10.075 10.122   9.652 B8 34 0
10 * tet01 Ori D Y*O 05 35 17.2574309230 -05 23 16.567215876 6.08 6.79 6.70 6.40 6.20 B1.5Vp 304 0
11 M 42 HII 05 35 17.3 -05 23 28           ~ 3682 0

    Equat.    Gal    SGal    Ecl

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2020.01.28-17:41:31

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