| discov_num |
notes |
refcode |
| STF 774 |
AB: zet Ori = 50 Ori = Alnitak. A premature orbit has been computed. |
|
|
Spectral types of AB: O9.5Ibe and B0III. |
|
|
Levato et al. (ApJS, 68, 319, 1988) and Fullerton (1990, PhD thesis, |
Lev1988 |
|
U. Toronto) report small RV variations (<35 km/sec), not confirmed. |
Ful1990 |
|
See Baize & Petit (1989) catalog of doubles with variable component. |
Baz1989d |
|
Spectral type of Aa O9.5Ib, spectral type of Ab B0.5IV |
Opl2023 |
|
Both A and B components were observed and appeared to be single. |
Msn1998a |
|
Classification of the B component is from Hoffleit & Warren (1991). |
Hof1991 |
|
AC: Star C (mag. about 9, 60") may be physical. |
|
| NOI 1 |
Aa,Ab: Combined spectroscopic/astrometric solution, using NPOI |
|
|
interferometric measures with radial velocities from disentangled |
|
|
spectra to determine first dynamical mass for an O-type supergiant. |
|
|
Mass of the O9.5Ib primary is 24.8 +/- 5.6 Msun, that of the B0/1 |
|
|
secondary is 16.4 +/- 4.9 Msun. |
NOI2011 |
|
Aa,Ab: Hummel et al. (2013) calculated a combined interferometric/ |
|
|
spectroscopic orbit of zet Ori. Derived masses are 14.0 +/- 2.2 and |
|
|
7.4 +/- 1.1 Msun; orbital parallax is 3.4 +/- 0.2 mas, but as this is |
|
|
based on rather low velocity amplitudes, the photometric distance |
|
|
(2.6 +0.4/-0.3 mas) is considered more robust. Based on photometric |
|
|
distance, spectral types for Aa, Ab, and B are O9.5Iab, B1IV, and |
|
|
B0III, respectively. Masses for Aa and Ab are 33 +/- 10 and 14 +/- 3 |
|
|
Msun, considerably larger than the dynamical values. |
Hmm2013 |
|
Intensity Interferometer Limb-darkened diameter 0.48 +/- 0.04 mas. |
HBr1974 |
|
Uniform disk diameter 0.546 +/- 0.029 mas, |
|
|
Limb darkened diameter 0.485 +/- 0.019 mas, |
|
|
Radius is 21.5 +/- 5.4 \rsun. |
CIA2018e |
| STF 774 |
AC: H 4 21. |
MEv2010 |
| refcode |
metd |
author |
reference |
| Baz1989d |
- |
Baize, P. & Petit, M. |
1989A&AS...77..497B |
| Baz1989d |
|
A&AS 77, 497, 1989 |
|
| CIA2018e |
not j |
Gordon, K.D., Gies, D.R., Schaefer, G.H., Huber, D., Ireland, M. & Hillier, D.J. |
2018ApJ...869...37G |
| CIA2018e |
|
ApJ 869, 37, 2018 |
|
| Ful1990 |
- |
Fullerton, A.W. |
. |
| Ful1990 |
|
PhD thesis, Univ. of Toronto, 1990 |
|
| HBr1974 |
- |
Hanbury Brown, R., Davis, J., & Allen, L.R. |
1974MNRAS.167..121H |
| HBr1974 |
|
MNRAS 167, 121, 1974 |
|
| Hmm2013 |
orb - |
Hummel, C.A., Rivinius, Th., Nieva, M.-F., Stahl, O., van Belle, G., & Zavala, R. |
2013A&A...554A..52H |
| Hmm2013 |
|
A&A 554, A52, 2013 (also NOI2013) |
|
| Hof1991 |
- |
Hoffleit, D. & Jaschek, C. |
1991bsc..book.....H |
| Hof1991 |
|
The Bright Star Catalogue, Fifth Revised Edition (preliminary version), 1991 |
|
| Lev1988 |
- |
Levato, H., Morrell, N., Garcia, B., & Malaroda, S. |
1988ApJS...68..319L |
| Lev1988 |
|
ApJS 68, 319, 1988 |
|
| MEv2010 |
- |
MacEvoy, B. |
................... |
| MEv2010 |
|
private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) |
|
| Msn1998a |
Sc j |
Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G., |
1998AJ....115..821M |
| Msn1998a |
|
ten Brummelaar, T.A., & McAlister, H.A. |
|
| Msn1998a |
|
AJ 115, 821, 1998 |
|
| NOI2011 |
Kn - |
Rivinius, Th., Hummel, C.A., & Stahl, O. |
. |
| NOI2011 |
+orb |
Proc. IAU Symp 272, 2011 |
|
| Opl2023 |
- |
Oplistilova, A., Mayer, P., Harmanec, P. et al. |
2023A&A...672A..31O |
| Opl2023 |
|
A&A 672, A31, 2023 |
|
