2002AJ....124.2899K

Query : 2002AJ....124.2899K

2002AJ....124.2899K - Astron. J., 124, 2899-2904 (2002/November-0)

Close binaries in the η Chamaeleontis cluster.

KOEHLER R. and PETR-GOTZENS M.G.

Abstract (from CDS):

We have used speckle interferometry and adaptive optics observations to search for multiple systems among 13 stars in the η Chamaeleontis cluster. We discovered two previously unknown subarcsecond binaries. Placing the components in infrared color-magnitude diagrams shows that most members of η Cha are coeval. Repeated observations of the binary RECX 1 allow us to determine a preliminary orbit and derive a system mass of about 2 M☉.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: General - Infrared Radiation - Galaxy: Open Clusters and Associations: Individual: Name: η Chamaeleontis - Stars: Pre-Main-Sequence - Techniques: High Angular Resolution

Simbad objects: 13

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Number of rows : 13
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 V* EG Cha Or* 08 36 56.2143359952 -78 56 45.633633000   11.82 10.457   9.010 K4Ve 110 0
2 * eta Cha Pu* 08 41 19.5125857944 -78 57 48.105898056 5.02 5.351 5.453     B8V 246 0
3 V* EH Cha Or* 08 41 37.0144539384 -79 03 30.535583220     14.4 14.011   M3.5 62 0
4 V* EI Cha Or* 08 42 23.7595500240 -79 04 02.976309552     12.7     M1.5 71 0
5 V* EK Cha Or* 08 42 27.0967343784 -78 57 47.910415932   16.659 15.153 14.893   M4.5 84 0
6 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
7 V* EL Cha TT* 08 42 38.7832034688 -78 54 42.736732812   15.540 14.081 13.778   M3.0 69 0
8 V* EM Cha Or* 08 43 07.2443828304 -79 04 52.483961064     10.8     K6.0 64 0
9 * 9 Cha SB* 08 43 12.1984130688 -79 04 12.368512452   6.28 6.07     A7V 242 0
10 V* EN Cha Or* 08 44 16.421808 -78 59 08.06316   16.425 14.967 14.688   M4.5 70 0
11 V* EO Cha Or* 08 44 31.8938144088 -78 46 31.143275076     12.531   10.646 M0e 83 0
12 V* EP Cha Or* 08 47 01.6439909496 -78 59 34.380161016     11.1     K5IVe 109 0
13 V* EQ Cha TT* 08 47 56.7585043512 -78 54 53.185560516   14.777 13.308 12.802 10.795 M3 88 0

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