New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Hα 5 in the Chamaeleon I star-forming region

Home

All issues

Volume 557 (September 2013)

A&A, 557 (2013) A80

Full HTML

Free Access

Table 6

Relative astrometric results.

Object	Epoch	Change in	Sign.^a,c	Sign.^c orb.	Change in	Sign.^a,^c	Sign.^c orb.
	difference	separation	not Backg.	motion	PA^b [°]	not Backg.	motion
	[days]	[pixel]	σ _{ρ, back}	σ _{ρ, orb}	Δ PA ± δ _{Δ PA}	σ _{PA, back}	σ _{PA, orb}
	Δt	Δ ρ ± δ _Δ ρ

DI Cha AB	1098.78252	0.846 ± 0.928	3.3	0.9	0.184 ± 0.249	2.6	0.7
	367.01410	0.347 ± 0.379	2.8	0.9	0.017 ± 0.092	1.9	0.2
AC	1098.78252	−0.365 ± 0.942	2.0	0.4	0.087 ± 0.249	2.3	0.3
	367.01410	−0.302 ± 0.373	1.3	0.8	0.013 ± 0.091	1.9	0.1
A(BC)^d	1098.78252	0.187 ± 0.942	2.6	0.2	0.139 ± 0.249	2.5	0.6
	367.01410	0.020 ± 0.389	2.0	0.1	0.014 ± 0.092	1.9	0.2
BC	1098.78252	−0.743 ± 0.131	2.0	5.7	−14.805 ± 1.325	6.9	11
	367.01410	−0.518 ± 0.163	1.1	3.2	−5.323 ± 1.001	6.6	5.3
AD	1098.78252	0.256 ± 0.238	8.5	1.1	6.564 ± 0.859	7.0	7.6
Sz 22 AB	731.76084	0.374 ± 0.085	5.2	4.4	−0.132 ± 0.184	1.6	0.7
CHXR 32 AB	1062.99439	0.746 ± 0.529	3.3	1.4	−0.087 ± 0.243	1.0	0.4
AC	1062.99439	−1.109 ± 1.092	3.8	1.0	0.338 ± 0.268	0.1	1.3
A(BC)^d	1062.99439	0.322 ± 0.557	3.6	0.6	0.007 ± 0.244	0.8	0.0
	366.01016	−0.260 ± 0.336	3.8	0.8	−0.019 ± 0.103	0.8	0.2
A(BC)^e	1062.99439	0.006 ± 0.613	3.8	0.0	0.084 ± 0.246	0.5	0.3
BC	1062.99439	2.130 ± 0.820	0.7	2.6	−7.512 ± 2.530	3.2	3.0
Cha Hα 5 AB	1098.98678	−0.170 ± 0.259	1.4	0.7	23.596 ± 8.940	8.5	2.6
Acc1	1098.98678	−1.662 ± 0.395	0.2	4.2	−1.370 ± 0.295	1.8	4.6
Bcc1	1098.98678	−3.037 ± 0.476	0.4	6.4	−0.976 ± 0.315	2.1	3.1
(AB)cc1^f	1098.98678	−2.333 ± 0.456	0.1	5.1	−1.185 ± 0.313	1.9	3.8
	365.05156	−1.055 ± 0.257	0.5	4.1	−0.458 ± 0.153	1.7	3.0

Notes.

^(a)

Assuming the fainter component is a non-moving background star.

^(b)

PA is measured from N over E to S.

^(c)

Significances are given relative to the last epoch.

^(d)

Results of component A relative to the centre of brightness of components B and C.

^(e)

See in Table 5.

^(f)

Results of the centre of brightness of components A and B relative to the further companion candidate cc1.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.