LSR J1835+3259
Coordinates: 
18h 35m 37.902s, +32° 59′ 54.59″
| Observation data Epoch J2000[1] Equinox J2000[1] |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 35m 37.902s[1] |
| Declination | +32° 59′ 54.59″[1] |
| Characteristics | |
| Spectral type | M8.5[2] |
| Apparent magnitude (V (USNO filter system)) | 18.27 ± 0.03[2] |
| Apparent magnitude (I (USNO filter system)) | 13.46 ± 0.02[2] |
| Apparent magnitude (z (USNO filter system)) | 12.63 ± 0.02[2] |
| Apparent magnitude (J (2MASS filter system)) | 10.27 ± 0.03[2] |
| Apparent magnitude (H (2MASS filter system)) | 9.58 ± 0.05[2] |
| Apparent magnitude (Ks (2MASS filter system)) | 9.15 ± 0.04[2] |
| Astrometry | |
| Radial velocity (Rv) | -10 ± 40[3] km/s |
| Parallax (π) | 176.5 ± 0.5[2] mas |
| Distance | 18.48 ± 0.05 ly (5.67 ± 0.02 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
LSR J1835+3259 is a nearby brown dwarf star of spectral class M8.5,[2] located in constellation Lyra, the discovery of which was published in 2003,[2][3] and it is the 3rd nearest M-type brown dwarf after DEN 1048-3956 and LP 944-020.[3]
Distance
Trigonometric parallax of this object, measured in 2001–2002 with the USNO 61 inch (1.5 m) reflector under US Naval Observatory (USNO) parallax program, is 0.765 ± 0.0005 arcsec, corresponding to a distance of 5.67 ± 0.02 pc, or 18.48 ± 0.05 ly.[2]
Characteristics
The first extrasolar auroras detected occurred in the atmosphere of LSR J1835+3259. They were found in July 2015 by the Karl G. Jansky Very Large Array in New Mexico by analysing the emitted radio waves. The auroras were probably 1 million times brighter than those ever observed on Earth.[4] The aurora is mainly red in colour, because the charged particles are interacting with hydrogen in its atmosphere. It is not known what the cause is. Some have speculated that material maybe being stripped off the surface of the brown dwarf via stellar winds to produce its own electrons. Another possible explanation is an as-yet-undetected planet or moon around the dwarf, which is throwing off material to light it up, as is the case with Jupiter and its moon Io.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- Lua error in package.lua at line 80: module 'strict' not found. Table with parallaxes.
