SDSS J143317.78+101123.3.3
Observation data
Epoch J2000      Equinox
Constellation Boötes
Right ascension 14h 33m 17.7877s[1]
Declination +10° 11′ 23.485″[1]
Characteristics
J1433
Evolutionary stage White dwarf
Spectral type WD
J1433b
Evolutionary stage Brown dwarf
Spectral type L1±1
Astrometry
Proper motion (μ) RA: −12.782[1] mas/yr
Dec.: −53.117[1] mas/yr
Parallax (π)4.2866 ± 0.1566 mas[1]
Distance760 ± 30 ly
(233 ± 9 pc)
Absolute bolometric
magnitude (Mbol)		25
Orbit[2]
Period (P)78.1 min
Semi-major axis (a)0.5869 R☉
Inclination (i)84.36°
Semi-amplitude (K1)
(primary)		33.8 km/s
Semi-amplitude (K2)
(secondary)		511.1 km/s
Details
J1433
Mass0.8[3] M☉
Radius0.685[3] R☉
Surface gravity (log g)8.41[2] cgs
Temperature13,200±200[4] K
J1433b
Mass0.055±0.008[4] M☉
Mass57.1+0.7
−0.7 MJup
Temperature2,401±10 K (day)
2,344±7 (night)[4] K
Other designations
J1433, PM J14332+1011, SDSS J143317.78+101122.8, Gaia EDR3 1176468611268115200, Gaia DR2 1176468611268115200
J1433b: SDSS J143317.78+101122.8b
Database references
SIMBADdata

SDSS J143317.78+101123.3 (shortened to SDSS J1433+1011, more simply J1433) is a binary system composed of a white dwarf and a brown dwarf. The brown dwarf is about 57 Jupiter masses and has transitioned from a stellar object to a brown dwarf due to losing mass to the white dwarf. As of 2016, this was the only known binary of this type.[4]

References

  1. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 Savoury, C. D. J.; Littlefair, S. P.; Dhillon, V. S.; Marsh, T. R.; Gänsicke, B. T.; Copperwheat, C. M.; Kerry, P.; Hickman, R. D. G.; Parsons, S. G. (2011). "Cataclysmic variables below the period gap: Mass determinations of 14 eclipsing systems". Monthly Notices of the Royal Astronomical Society. 415 (3): 2025. arXiv:1103.2713. Bibcode:2011MNRAS.415.2025S. doi:10.1111/j.1365-2966.2011.18707.x. S2CID 119180368.
  3. 1 2 "J1433". www.exoplanetkyoto.org. Retrieved 2022-06-21.
  4. 1 2 3 4 Hernández Santisteban, Juan V.; Knigge, Christian; Littlefair, Stuart P.; Breton, Rene P.; Dhillon, Vikram S.; Gänsicke, Boris T.; Marsh, Thomas R.; Pretorius, Magaretha L.; Southworth, John; Hauschildt, Peter H. (2016). "An irradiated brown-dwarf companion to an accreting white dwarf". Nature. 533 (7603): 366–368. arXiv:1605.07132. Bibcode:2016Natur.533..366H. doi:10.1038/nature17952. PMID 27193683. S2CID 4448224.


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