discov_num |
notes |
refcode |
LAB 2 |
Aa,Ab: bet Per = 26 Per = Algol , prototype of the Algol-type binaries. |
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|
The eclipse phenomena, known since historical times (although the time |
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of minimum brightness was first measured by Montanari on 8 Nov 1670) |
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was first explained as an eclipsing binary by Goodericke as early as |
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1782. According to R.G. Aitken, this was verified when it was noted as |
A__1935f |
|
the second spectroscopic binary based on photographic spectra |
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obtained by Prof. H.C. Vogel at Potsdam in November, 1889. Belopolsky |
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discovered a variation in the radial velocity with a period of order |
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1.8 years, later resolved by Labeyrie and his speckle camera in 1973; |
Lab1974 |
|
the magnitude difference is about 2.5. |
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The binary, a radio and X-ray source, is triple (and possibly |
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quadruple, but the variation with the 32 yr period is more probably an |
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apsidal rotation of the eclipsing pair). |
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The spectroscopic data were discussed by Hill et al. (1970, 1971). |
HlG1970 |
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ADS lists several distant, faint, and probably optical companions. |
HlG1971 |
|
Elements P, T, e, and omega for Labeyrie et al. (1974) orbit adopted |
Lab1974 |
|
from the spectroscopic orbit of Hill et al. (1971). |
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|
Analysis of the spectroscopic/interferometric orbit is given by |
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|
Bonneau (1979) |
Bnu1979 |
|
See Baize & Petit (1989) catalog of doubles with variable component. |
Baz1989d |
|
Hipparcos astrometric solution adopts some elements from the orbits of |
HIP1997d |
|
Pan et al. (1993) and |
MkT1993a |
|
Gatewood et al. (1995). |
Gat1995 |
|
Peterson et al. (2011) orbits of both the outer (LAB 2Aa,Ab) and |
Ptn2011 |
|
inner (CSI 1Aa1,Aa2) are based on VLBI measures combined with |
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|
speckle and radial velocity data. Assuming masses of the primary and |
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secondary of 3.70 and 0.79 Msun, respectively, they derive a mass for |
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the tertiary of 1.51 +/- 0.02 Msun. |
|
BU 526 |
AB: Additional notes may be found in Burnham (1894). |
Bu_1894 |
idgroup |
discov |
author |
1 |
BU |
Burnham, S.W. (BU 1 - 81) |
179 |
CSI |
Csizmadia, Sz., Borkovits, T., Paragi, Zs., Abraham, P., Szabados, L., Mosoni, L., |
179 |
CSI |
Sturmann, L., Sturmann, J., et al. |
180 |
DAL |
Daley, J.A. |
230 |
JNN |
Janson, M., Brandner, W., Henning, T., & Zinnecker, H. |
231 |
JNN |
Janson, M., Brandner, W., Lenzen, R., Close, L., Nielsen, E., Hartung, M., |
231 |
JNN |
Henning, T., & Rouy, H. |
232 |
JNN |
Janson, M., Carson, J., Thalmann, C., McElwain, M.W., Goto, M., Crepp, J., |
232 |
JNN |
Wisniewski, J., Abe, L., et al. |
233 |
JNN |
Janson, M., Bonavita, M., Klahr, H., Lafreniere, D., Jayawardhana, R., |
233 |
JNN |
& Zinnecker, H. |
234 |
JNN |
Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S., |
234 |
JNN |
Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T. |
235 |
JNN |
Janson, M., Jayawardhana, R., Girard, J.H., Lafreniere, D., Bonavita, M., |
235 |
JNN |
Gizis, J., & Brandeker, A. |
236 |
JNN |
Janson, M., Lafreniere, D., Jayawardhana, R., Bonavita, M., Girard, J.H., |
236 |
JNN |
Brandeker, A., & Gizis, J.E. |
237 |
JNN |
Janson, M., Brandt, T.D., Moro-Martin, A., Usuda, T., Thalmann, C., Carson, J.C., |
237 |
JNN |
Goto, M., Currie, T., McElwain, M.W., Itoh, Y., Fukagawa, M., Crepp, J., et al. |
238 |
JNN |
Janson, M., Bergfors, C., Brandner, W., Kudryavtseva, N., Hormuth, F., |
238 |
JNN |
Hippler, S., & Henning, T. |
239 |
JNN |
Janson, M., Bergfors, C., Brandner, W., Bonnefoy, M., Schlieder, J., Kohler, R., |
239 |
JNN |
Hormuth, F., Henning, T., & Hippler, S. |
241 |
JNN |
Janson, M., Durkan, S., Hippler, S., Dai, X., Brandner, W., Schlieder, J., |
241 |
JNN |
Bonnefoy, M., & Henning, T. Jnn201 |
242 |
JNN |
Calissendorff, P., Janson, M., Kohler, R., Durkan, S., Hippler, S., Dai, X., |
242 |
JNN |
Brandner, W., Schlieder, J., & Henning, T. |
243 |
JNN |
Janson, M., Durkan, S., Bonnefoy, M., Rodet, L., Kohler, R., Lacour, S., Brandner, |
243 |
JNN |
W., Henning, R. & Girard, J. |
246 |
JNN |
Calissendorff, P., Janson, M., Rodet, L., Bonnefoy, M., Brandner, W., Brown-Sevilla, |
246 |
JNN |
S., Chauvin, G., Delorme, P., Desidera, S., Durkan, S., Fontanive, C., Gratton, R., |
246 |
JNN |
Hagelbe3rg, J., Henning, T., Hippler, S., Lagrange, A.-M., Langlois, M., Lazzoni, C. |
246 |
JNN |
Maire, A.-L., Messina, S., Meyer, M., Moller-Nsson, O., Rabus, M., Schlieder, J., |
246 |
JNN |
Vigan, A., Wahhaj, Z., Wildi, F. & Zurlo, A. |