2002A&A...394L..43K


Query : 2002A&A...394L..43K

2002A&A...394L..43K - Astronomy and Astrophysics, volume 394, L43-46 (2002/11-2)

Direct detection of the companion of χ1 Orionis.

KOENIG B., FUHRMANN K., NEUHAEUSER R., CHARBONNEAU D. and JAYAWARDHANA R.

Abstract (from CDS):

We present an H-band image of the companion of χ1 Orionis taken with the Keck adaptive optic system and NIRC 2 camera equipped with a 300mas-diameter coronographic mask. The direct detection of this companion star enables us to calculate dynamical masses using only Kepler's laws (MA=1.01±0.13M, MB=0.15±0.02M), and to study stellar evolutionary models at a wide spread of masses. The application of Baraffe et al. (1998A&A...337..403B) pre-main-sequence models implies an age of 70-130Myrs. This is in conflict to the age of the primary, a confirmed member of the Ursa Major Cluster with a canonical age of 300Myrs. As a consequence, either the models at low masses underestimate the age or the Ursa Major Cluster is considerably younger than assumed.

Abstract Copyright:

Journal keyword(s):

Simbad objects: 4

goto Full paper

goto View the references in ADS

Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 TYC 4737-23-1 * 04 52 58.8577896552 -00 14 41.171941788 12.105 11.900 11.719 11.627 11.530 A3 26 0
2 * chi01 Ori RS* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 826 0
3 CD-33 7795B LM* 11 31 55.2500 -34 36 25.200     20.40   15.8 M8.5/9e 120 0
4 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 402 0

To bookmark this query, right click on this link: simbad:objects in 2002A&A...394L..43K and select 'bookmark this link' or equivalent in the popup menu


2022.09.28-20:42:29

© Université de Strasbourg/CNRS

    • Contact