| discov_num |
notes |
refcode |
| ZUC 1 |
Aa,Ab: Magnitudes in J,H,K by Konacki et al. (2007) based on 2MASS |
Kon2007 |
|
combined magnitudes plus their flux ratios. They determine both |
|
|
components have spectral type M1.5 +/- 0.5; log (Temp) for both is |
|
|
3.56 +/- 0.01 K, intermediate between temperatures expected for dwarf |
|
|
and giant stars, thus appropriate for PMS stars. Log (Luminosity) for |
|
|
Aa and Ab are -0.80 +/- 0.08 and -0.84 +/- 0.08 Lsun, respectively. |
|
|
Aa,Ab: Schmidt et al. (2008) analyzed all available astrometry and |
Sdt2008c |
|
concluded TWA 5 exhibited orbital motion, refuting conjecture that |
|
|
companion was a background object. |
|
| LWR 2 |
This system has been identified as a member of the TW Hya association |
|
|
(Kastner et al. 1997 Science 277, 67) and is known as TWA 5. It |
|
|
contains a previously known brown dwarf TWA 5B, first suggested by |
|
|
Lowrance et al. (1999) and later confirmed by e.g. Brandeker et al. |
Lwr1999 |
|
(2003). The latter also reported the presence of a close companion |
Bnk2003 |
|
TWA 5Ab at 54 mas from the primary, independently detected by |
|
|
Macintosh et al. (2001). We detect TWA 5B in our AstraLux data, but |
MBA2001 |
|
not TWA 5Ab, which implies that the projected separation was probably |
|
|
smaller in 2010 than it was in 2000. The orbit of TWA 5Aa/Ab has been |
|
|
analyzed in detail by Konopacky et al. (2007). Using the orbital |
Kon2007 |
|
parameters that they determine, we deduce that at epoch 2010.11, the |
|
|
projected separation should be only about 18 mas, which is well |
|
|
consistent with our non-detection of TWA 5Ab. We use the best-fit |
|
|
total mass of 0.71Msun for TWA 5Aa/Ab from Konopacky et al. |
Jnn2012 |
|
Kohler et al. (2013) derive new orbits and masses for the young triple |
|
|
system TWA 5. System mass for the close pair ZUC 1Aa,Ab is 0.90 +/- |
|
|
0.1 Msun; system mass for the AB pair is 1.1 +/- 0.1 Msun. |
Koh2013 |
| refcode |
metd |
author |
reference |
| Bnk2003 |
A j |
Brandeker, A., Jayawardhana, R., & Najita, J. |
2003AJ....126.2009B |
| Bnk2003 |
|
AJ 126, 2009, 2003 |
|
| Bnk2003 |
|
(slight correction to 2001.145 theta and its error given by Neuhauser et al. 2010) |
2010A&A...516A.112N |
| Izm2019 |
orb u |
Izmailov, I.S. |
2019AstL...45...30I |
| Izm2019 |
|
Ast. Lett. 45, 30, 2019 |
|
| Izm2019 |
|
(Orbital elements from weighted solutions used when available (Table 2), |
|
| Izm2019 |
|
unweighted elements (Table 1) used for remaining 29 systems.) |
|
| Jnn2012 |
Cl j |
Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S., |
2012ApJ...754...44J |
| Jnn2012 |
+E2 |
Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T. |
|
| Jnn2012 |
|
ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b) |
2014ApJS..214...17J |
| Koh2013 |
A j |
Koehler, R., Ratzka, T., Petr-Gotzens, M.G., & Correia, S. |
2013A&A...558A..80K |
| Koh2013 |
+orb |
A&A 558, A80, 2013 |
|
| Kon2007 |
Si j |
Konopacky, Q.M., Ghez, A.M., Duchene, G., McCabe, C., & Macintosh, B.A. |
2007AJ....133.2008K |
| Kon2007 |
+A |
AJ 133, 2008, 2007 |
|
| Kon2007 |
+orb |
|
|
| Lwr1999 |
Hn j |
Lowrance, P.J., McCarthy, C., Becklin, E.E., Zuckerman, B., Schneider, G., |
1999ApJ...512L..69L |
| Lwr1999 |
+Ci |
Webb, R.A., Hines, D.C., Kirkpatrick, J.D., et al. |
|
| Lwr1999 |
+C |
ApJ 512, L69, 1999 |
|
| MBA2001 |
A j |
Macintosh, B.A., Max, C., Zuckerman, B., Becklin, E.E., Kaisler, D., Lowrance, P., |
2001ASPC..244..309M |
| MBA2001 |
+Si |
Weinberger, A., Christou, J., Schneider, G., & Acton, S. |
|
| MBA2001 |
|
"Young Stars Near Earth: Progress and Prospects", ASP Conf. 244, 309, 2001 |
|
| MBA2001 |
|
(slight correction to 2001.138 theta error given by Neuhauser et al. 2010) |
2010A&A...516A.112N |
| Sdt2008c |
A - |
Schmidt, T.O.B., Neuhauser, R., & Mugrauer, M. |
2008IAUS..248..126S |
| Sdt2008c |
+orb |
IAU Symp 248, 126, 2008 |
|
