2007A&A...468L...5B

Query : 2007A&A...468L...5B

2007A&A...468L...5B - Astronomy and Astrophysics, volume 468L5-8 (2007/6-2)

The young, wide and very low mass visual binary Lambda Orionis 167.

BARRADO Y NAVASCUES D., BAYO A., MORALES-CALDERON M., HUELAMO N., STAUFFER J.R. and BOUY H.

Abstract (from CDS):

We look for wide, faint companions around members of the 5Myr Lambda Orionis open cluster. We used optical, near-infrared, and Spitzer/IRAC photometry. We report the discovery of a very wide very low mass visual binary, LOri167, formed by a brown dwarf and a planetary-mass candidate located at 5 arcsec, which seems to belong to the cluster. We derive Teff of 2125 and 1750K. If they are members, comparisons with theoretical models indicate masses of 17+3–2 and 8+5–1Mjup, with a projected separation of 2000 AU. Such a binary system would be difficult to explain in most models, particularly those where substellar objects form in the disks surrounding higher mass stars.

Abstract Copyright: ∼

Journal keyword(s): open clusters and associations: individual: Collinder 69 - stars: low-mass, brown dwarfs - stars: binaries: visual - stars: pre-main sequence

Simbad objects: 1

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Number of rows : 1
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 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0

Query : 2007A&A...468L...5B

Basic data :
Cl Collinder 69 -- Open Cluster
Other object types: otypes_help 		OpC (2013A&A,OCl), Cl* (2020A&A,C,...)
ICRS coord. (ep=J2000) : 		05 35 32.1 +09 44 02 (Optical) [ ] E 2023A&A...674A..37G
FK4 coord. (ep=B1950 eq=1950) : 		05 32 47.0 +09 42 09 [ ]
Gal coord. (ep=J2000) : 		195.2790 -12.0131 [ ]
Proper motions mas/yr : 		1.194 -2.118 [0.021 0.017 90] C 2020A&A...633A..99C
Radial velocity / Redshift / cz : 		V(km/s) 27.73 [0.13] / z(spectroscopic) 0.000093 [0.000000] / cz 27.73 [0.13]
   (Opt) A 2021A&A...647A..19T
Parallaxes (mas): 		2.462 [0.005] C 2020A&A...633A..99C
Angular size (arcmin): 		360.0 360.0 0 (~) C 2022A&A...664A..66M
Fluxes (1) :
V 2.8 [~] E ~
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1
: 2123 		: 236 Display criteria :

Identifiers (9) :
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NAME lam Ori Cluster NAME lambda Ori Cluster OCl 479.0
C 0532+099 NAME lambda Ori Association [KPR2004b] 72
Cl Collinder 69 NAME lam Ori Group [KPS2012] MWSC 0580

References (369 between 1850 and 2026) (Total 369)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Velocities : 12    Distance : 8    Fe/H : 8    Plx : 10    PM : 15   

   

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