2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system?

S. L. Schuh*, G. Handler, H. Drechsel, P. Hauschildt, S. Dreizler, R. Medupe, C. Karl, R. Napiwotzki, S. L. Kim, B. G. Park, M. A. Wood, M. Paparó, B. Szeidl, G. Virághalmy, D. Zsuffa, O. Hashimoto, K. Kinugasa, H. Taguchi, E. Kambe, E. LeibowitzP. Ibbetson, Y. Lipkin, T. Nagel, E. Göhler, M. L. Pretorius

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We report the discovery of a new eclipsing system less than one arcminute south of the pulsating DB white dwarf KUV 05134+2605. The object could be identified with the point source 2MASSJ0516288+260738 published by the Two Micron All Sky Survey. We present and discuss the first light curves as well as some additional colour and spectral information. The eclipse period of the system is 1.29 d, and, assuming this to be identical to the orbital period, the best light curve solution yields a mass ratio of m2/m1 = 0.11, a radius ratio of r2/r1 ≈ 1 and an inclination of 74°. The spectral analysis results in a Teff = 4200 K for the primary. On this basis, we suggest that the new system probably consists of a late K + Brown dwarf (which would imply a system considerably younger than ≈0.01 Gyr to have r2/r1 ≈ 1), and outline possible future observations.

Original languageEnglish
Pages (from-to)649-661
Number of pages13
JournalAstronomy and Astrophysics
Issue number2
StatePublished - Nov 2003


  • Ephemerides
  • Stars: binaries: eclipsing
  • Stars: individual: 2MASSJ0516288+260738
  • Stars: low-mass, brown dwarfs
  • Stars: variables: general


Dive into the research topics of '2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system?'. Together they form a unique fingerprint.

Cite this