2008ApJ...682.1248S


Query : 2008ApJ...682.1248S

2008ApJ...682.1248S - Astrophys. J., 682, 1248-1255 (2008/August-1)

BD -22 5866: a low-mass, quadruple-lined spectroscopic and eclipsing binary.

SHKOLNIK E., LIU M.C., REID I.N., HEBB L., CAMERON A.C., TORRES C.A. and WILSON D.M.

Abstract (from CDS):

We report our discovery of an extremely rare, low-mass, quadruple-lined spectroscopic binary BD -22 5866 (=NLTT 53279, integrated spectral type = M0 V), found during an ongoing search for the youngest M dwarfs in the solar neighborhood. From the cross-correlation function, we are able to measure relative flux levels, estimate the spectral types of the components, and set upper limits on the orbital periods and separations. The resulting system is hierarchical, composed of a K7 + K7 binary and an M1 + M2 binary with semimajor axes of aAsiniA≤0.06 and aBsiniB≤0.30 AU. A subsequent search of the SuperWASP photometric database revealed that the K7 + K7 binary is eclipsing with a period of 2.21 days and at an inclination angle of 85°. Within uncertainties of 5%, the masses and radii of both components appear to be equal (0.59 M, 0.61 R). These two tightly orbiting stars (a=0.035 AU) are in synchronous rotation, causing the observed excess Ca II, Hα, X-ray, and UV emission. The fact that the system was unresolved with published adaptive optics imaging, limits the projected physical separation of the two binaries at the time of the observation to dAB≲4.1 AU at the photometric distance of 51 pc. The maximum observed radial velocity difference between the A and B binaries limits the orbit to aABsiniAB≤6.1 AU. As this tight configuration is difficult to reproduce with current formation models of multiple systems, we speculate that an early dynamical process reduced the size of the system, such as the interaction of the two binaries with a circumquadruple disk. Intensive photometric, spectroscopic, and interferometric monitoring, as well as a parallax measurement of this rare quadruple system, is certainly warranted.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Binaries: Spectroscopic - Stars: Activity - stars: individual (BD -22 5866) - Stars: Late-Type - Stars: Low-Mass, Brown Dwarfs

Simbad objects: 24

goto Full paper

goto View the references in ADS

Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * tau Cet PM* 01 44 04.0831371922 -15 56 14.927607677 4.43 4.22 3.50 2.88 2.41 G8V 1182 1
2 2MASS J01542930+0053266 EB* 01 54 29.3039596704 +00 53 26.697572880           M0+M1 17 0
3 NAME SDSS-MEB-1 SB* 03 18 23.8769202096 -01 00 18.413811144         16.91 ~ 24 0
4 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3226 0
5 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 697 1
6 2MASS J04463285+1901432 EB* 04 46 32.8622247312 +19 01 43.246330320   19.9 19.0     M 24 0
7 HD 36395 PM* 05 31 27.3957852161 -03 40 38.024004501 10.626 9.443 7.968 6.996 5.913 M1.5Ve 477 0
8 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 842 0
9 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 211 0
10 V* XY Leo EB* 10 01 40.4170488672 +17 24 32.602180644   10.66 9.68   8.474 K0V 269 0
11 MCC 124 BY* 10 14 19.1632274905 +21 04 29.817290641 12.667 11.451 10.083 9.155 8.250 M0.7V 116 1
12 V* VW LMi EB* 11 02 51.9104777040 +30 24 54.702250596   8.43 8.06     F5V 85 1
13 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 579 1
14 FBS 1345+796 EB* 13 45 34.8710774664 +79 23 48.290145432     13.363 13.074   M4/5 40 0
15 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 91 0
16 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 425 0
17 NAME TrES-Her0-07621 EB* 16 50 20.7262037184 +46 39 01.369643976     15.51     ~ 22 0
18 OGLE BW3 V38 EB* 18 04 44.2025491872 -30 09 05.497738668     18.300   16.3335 ~ 42 0
19 TYC 458-434-1 EB* 18 30 51.9303 +07 09 18.781   12.73 12.35 12.11   K7V 14 0
20 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 603 0
21 Wolf 918 PM* 21 09 17.4271514815 -13 18 09.013127841 13.501 12.362 10.869 9.891 8.805 M1V 136 0
22 BD-22 5866 SB* 22 14 38.3705936256 -21 41 53.188190988   11.72 10.428 10.137 8.606 M0Ve 40 1
23 CPD-64 4353 PM* 23 31 57.4972242696 -63 51 48.782247588   11.91 10.464   9.451 K2V(e) 8 0
24 V* BR Psc BY* 23 49 12.5250852078 +02 24 04.405476893 11.532 10.427 8.993 8.029 6.946 dM1 308 0

To bookmark this query, right click on this link: simbad:objects in 2008ApJ...682.1248S and select 'bookmark this link' or equivalent in the popup menu


2022.09.26-13:50:58

© Université de Strasbourg/CNRS

    • Contact