| discov_num |
notes |
refcode |
| FIN 324 |
f Pup. It was resolved as 0.2" binary FIN 324AB in 1954.31 by Finsen |
|
|
(1956) using double-slit interferometer at the 0.7 m Innes refractor. |
Fin1956a |
|
The components were comparable in brightness with dm from 0.3 to 0.6. |
|
|
Finsen published 7 mean positions resulting from 25 nights (the last |
|
|
one in 1960.26). His measures show considerable scatter; the motion |
|
|
looks erratic rather than regular. Finsen could not resolve AB since |
|
|
1960.29, despite repeated attempts. However, on 1963.305 he found |
|
|
another companion C at 0.52" with dm =0.8. In fact W. van den Bos saw |
Fin1964a |
|
both companions earlier and measured AB and AC simultaneously in |
|
|
1956.2 and 1959.7 (van den Bos 1957, 1961). AC was measured later by |
B__1957b |
|
R.H. Wilson, Hipparcos, and various speckle interferometers. All |
B__1961a |
|
speckle observations show no trace of the subsystem AB, except the one |
|
|
on 1989.305 where B looks doubtful and much fainter than C (McAlister |
McA1990 |
|
1990). No trace of B was seen at SOAR in 2008-2011 (4 speckle runs). |
|
|
AC follows a Keplerian orbit with 81 yr period (Hartkopf et al. 2012) |
Hrt2012a |
|
which was slightly corrected here using the latest measure. This |
|
|
excludes confusion between the companions (i.e. B and C being the same |
|
|
star). Besides, both were measured concurrently by van den Bos. |
|
|
The companion B cannot be real. The closest separation of AC is 0.09" |
|
|
according to the orbit and excludes any sub-system with comparable |
|
|
separation because such a triple star would be dynamically unstable. |
|
|
The fact that the orbit of AC is known does not allow us to explain the |
|
|
apparent non-hierarchical configuration by projection. If B were real, |
|
|
its orbital period would be on the order of 10 yr (scaling from the |
|
|
orbit of AC) and it would have shown up in our speckle data. Like 104 |
|
|
Tau, we have here a binary which actually is not binary, but a ghost. |
Tok2012b |
|
AB,C: Malkov et al. (2012) derive dynamical, photometric, and |
|
|
spectroscopic masses 6.74 +/- 1.03, 4.81, and 3.09 Msun, respectively. |
Mlk2012 |
| refcode |
metd |
author |
reference |
| B__1957b |
Ma - |
van den Bos, W.H. |
1957CiUO..116..291V |
| B__1957b |
|
Union Obs. Johannesburg Circ. 116, 291, 1957 |
|
| B__1961a |
Ma - |
van den Bos, W.H. |
1961CiUO..120..353V |
| B__1961a |
|
Union Obs. Johannesburg Circ. 120, 353, 1961 |
|
| Fin1956a |
Ma - |
Finsen, W.S. |
1956CiUO..115..259F |
| Fin1956a |
+J |
Union Obs. Johannesburg Circ. 115, 259, 1956 |
|
| Fin1964a |
J j |
Finsen, W.S. |
1964ROCi..123...53F |
| Fin1964a |
|
Republic Obs. Circ. 123, 53, 1964 |
|
| Hrt2012a |
orb - |
Hartkopf, W.I., Tokovinin, A., & Mason, B.D. |
2012AJ....143...42H |
| Hrt2012a |
+lin |
AJ 143, 42, 2012 |
|
| McA1990 |
Sc j |
McAlister, H.A., Hartkopf, & Franz, O.G. |
1990AJ.....99..965M |
| McA1990 |
|
AJ 99, 965, 1990 |
|
| Mlk2012 |
not - |
Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. |
2012A&A...546A..69M |
| Mlk2012 |
|
A&A 546, A69, 2012 |
|
| Tok2012b |
S j |
Tokovinin, A. |
2012AJ....144...56T |
| Tok2012b |
+orb |
AJ 144, 56, 2012 |
|
