2MASS J0516288+260738 : Discovery of the first eclipsing late K + Brown dwarf binary system?
- Author(s)
- S L Schuh, Gerald Handler, H Drechsel, P Hauschildt, Stefan Dreizler, R Medupe, C Karl, R Napiwotzki, S -L Kim, Byeong G Park, Matt A. Wood, Margit Paparó, B Szeidl, G Viraghalmy, D Zsuffa, O Hashimoto, K Kinugasa, H Taguchi, E Kambe, Elia M. Leibowitz, P. A. Ibbetson, Y Lipkin, T Nagel, E Göhler, M L Pretorius
- Abstract
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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Georg-August-Universität Göttingen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Universität Hamburg, Eberhard Karls Universität Tübingen, South African Astronomical Observatory (SAAO), Korea Astronomy and Space Science Institute, Florida Institute of Technology, Hungarian Academy of Sciences, Gunma Astronomical Observatory, National Defense Academy of Japan, Tel Aviv University, University of Cape Town, North-West University
- Journal
- Astronomy & Astrophysics
- Volume
- 410
- Pages
- 649-661
- No. of pages
- 13
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361:20031241
- Publication date
- 2003
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/2mass-j0516288260738--discovery-of-the-first-eclipsing-late-k--brown-dwarf-binary-system(78309521-b8cf-4873-8215-9f8fe7bf408e).html