WD J1953−1019
Appearance
![]() Pan-STARRS color composite image of the WD J1953−1019 system, with the three components annotated.[a] | ||
Observation data Epoch 2015.5 Equinox 2015.5 | ||
---|---|---|
Constellation | Aquila | |
Right ascension | A: 19h 53m 33.11s B: 19h 53m 35.99s C: 19h 53m 36.02s | |
Declination | A: −10° 19′ 55.10″ B: −10° 19′ 31.76″ C: −10° 19′ 29.49″ | |
Characteristics | ||
Evolutionary stage | White dwarf | |
Spectral type | DA | |
Apparent magnitude (V) | 17.27 (A) · 16.05 (B) · 16.29 (C) | |
Apparent magnitude (G) | 17.28 (A) · 16.35 (B) · 16.44 (C) | |
Apparent magnitude (B) | 17.27 (A) · 16.05 (B) · 16.29 (C) | |
Apparent magnitude (R) | 17.30 (A) · 16.30 (B) · 16.44 (C) | |
Apparent magnitude (g) | 17.18 (A) · 16.15 (B) · 16.24 (C) | |
Distance 128.36 ± 2.40 pc | | |
B | ||
Distance | 130.89 ± 2.01 pc | |
Details[1] | ||
Mass | A: 0.63±0.03 B: 0.62±0.03 C: 0.60±0.03 M☉ | |
Temperature | A: 13715±310 B: 22223±360 C: 22104±350 K | |
Other designations | ||
A: Gaia DR2 4190500054845023488 B: Gaia DR2 4190499986125543168 C: Gaia DR2 4190499986125543296 | ||
Database references | ||
A | ||
SIMBAD | data | |
B | ||
SIMBAD | data | |
C | ||
SIMBAD | data |
WD J1953−1019 is a hierarchical triple system of white dwarfs located at about 130 parsecs (about 420 light years) from the Earth. This is the first triple system of white dwarfs to be resolved.[3][1] The three white dwarfs have an atmosphere of pure hydrogen and a mass of about 0.6 times that of the Sun.
The system consists of a central pair, WD J1953−1019 BC, and a distant companion, WD J1953−1019 A. WD J1953−1019 B and C correspond to the sources
barycenter, or center of mass, of the central binary at a distance of 6398.97±0.09 AU.[1]
The cooling age found by M. Perpinyà-Vallès and collaborators for the three white dwarfs is consistent, with an estimated value between 40 and 290 million years.Chandrasekhar mass.[1]
See also
- Cetus
- WD J0651+2844 – another short-period binary white dwarf system, in the constellation Gemini
Notes
References
- ^ .
- S2CID 119266289. 99.
- ^ "A student at the UPC's Barcelona School of Telecommunications has discovered the first resolved triple white dwarf system ever reported". BarcelonaTech. Universitat Politècnica de Catalunya. 13 February 2019. Retrieved 7 May 2019.
- ^ "Gaia DR2 4190499986125543168 -- White Dwarf". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 7 May 2019.
- ^ "Gaia DR2 4190499986125543296 -- White Dwarf". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 7 May 2019.