2007ApJ...667.1161S

Query : 2007ApJ...667.1161S

2007ApJ...667.1161S - Astrophys. J., 667, 1161-1169 (2007/October-1)

A parallactic distance of 389+24–21 parsecs to the Orion nebula cluster from very long baseline array observations.

SANDSTROM K.M., PEEK J.E.G., BOWER G.C., BOLATTO A.D. and PLAMBECK R.L.

Abstract (from CDS):

We determine the parallax and proper motion of the flaring, nonthermal radio star GMR A, a member of the Orion Nebula Cluster, using Very Long Baseline Array observations. Based on the parallax, we measure a distance of 389+24–21 pc to the source. Our measurement places the Orion Nebula Cluster considerably closer than the canonical distance of 480±80 pc determined by Genzel et al. A change of this magnitude in distance lowers the luminosities of the stars in the cluster by a factor of ∼1.5. We briefly discuss two effects of this change–an increase in the age spread of the pre-main-sequence stars, and better agreement between the zero-age main sequence and the temperatures and luminosities of massive stars.

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Journal keyword(s): Astrometry - Galaxy: Open Clusters and Associations: Individual: Name: Orion Nebula Cluster - Stars: Distances - stars: individual (GMR A) - Techniques: Interferometric

Simbad objects: 12

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Number of rows : 12
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 ICRF J052953.5-051941 Bla 05 29 53.53350015 -05 19 41.6169258       19.40   ~ 50 2
2 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
3 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
4 COUP 450 TT* 05 35 11.8040700 -05 21 49.266135           K5V 63 0
5 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
6 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1479 1
7 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
8 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
9 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
10 HD 37061 Or* 05 35 31.3649044920 -05 16 02.582064192 6.44 7.09 6.83     O9.5V 376 0
11 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
12 QSO B0539-057 Bla 05 41 38.08336552 -05 41 49.4283917     20.4 20.70   ~ 279 1

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