WISEP J060738.65+242953.4 (designation is abbreviated to W0607+2429[1]) is a brown dwarf of spectral class L8,[1] located in the constellation Gemini at approximately 25 light-years from Earth.[1]
| Observation data Epoch 2010.30[1] Equinox J2000[1] | |
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 07m 38.65s[1] |
| Declination | 24° 29′ 53.5″[1] |
| Characteristics | |
| Spectral type | L8[1] |
| Apparent magnitude (i) | 20.02 ± 0.03[1] |
| Apparent magnitude (z) | 16.94 ± 0.01[1] |
| Apparent magnitude (J (2MASS filter system)) | 14.22 ± 0.03[1] |
| Apparent magnitude (H (2MASS filter system)) | 13.04 ± 0.03[1] |
| Apparent magnitude (KS (2MASS filter system)) | 12.47 ± 0.02[1] |
| Astrometry | |
| Proper motion (μ) | RA: -472.871[2] mas/yr Dec.: -318.464[2] mas/yr |
| Parallax (π) | 138.0616 ± 0.5185 mas[2] |
| Distance | 23.62 ± 0.09 ly (7.24 ± 0.03 pc) |
| Details[1] | |
| Mass | 0.03–0.072 M☉ |
| Luminosity | 10−4.56 ± 0.09 L☉ |
| Temperature | 1460 ± 90 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Discovery
editWISEP J060738.65+242953.4 was discovered in 2012 by Castro & Gizis from data collected by the Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 centimetres (16 in) space telescope, whose mission lasted from December 2009 to February 2011. There are also precovery identifications of this object in Two Micron All-Sky Survey (2MASS) data (observation epoch 1998.11) and in the Sloan Digital Sky Survey (SDSS) (DR7) (observation epoch 2006.98).[1] In 2012 Castro & Gizis published a paper in The Astrophysical Journal, where they presented discovery of a newfound WISE L-type brown dwarf WISEP J060738.65+242953.4 (a single discovery, presented in the article).[1]
Distance
editTrigonometric parallax of WISEP J060738.65+242953.4 is not yet measured. Therefore, there are only distance estimates of this object, obtained by indirect — spectrophotometric — means (see table).
| Source | Parallax, mas | Distance, pc | Distance, ly | Ref. |
|---|---|---|---|---|
| Castro & Gizis (2012) | 7.8+1.4 −1.2 |
25.4+4.6 −3.9 |
[1] | |
| Gaia EDR3 | 138.0616 | 7.24±0.03 | 23.62±0.09 | [2] |
Non-trigonometric distance estimates are marked in italic.
Physical properties
editWISEP J060738.65+242953.4 has a temperature of 1460 ± 90 K and bolometric luminosity of 10−4.56 ± 0.09 Solar luminosities (the estimates are based on the object's spectral class (L8)).[4] Mass estimates, determined from this temperature, are from 0.03 (for an assumed age of 0.5 Gyr) to 0.072 (for an assumed age of 10 Gyr) Solar masses, below the hydrogen-burning limit, which implies that WISEP J060738.65+242953.4 is not a true star, but only a substellar object.[4]
While some researchers had claimed that WISEP J060738.65+242953.4 may be viewed from its pole, or may rotate slowly because of its narrow spectral lines, later work demonstrated that both of these claims were unlikely.[5] This latter study estimated that the size of the radio-emitting magnetosphere is approximately 107 m.
See also
edit- List of star systems within 20–25 light-years
- WISE 0031−3840 (L2 pec (blue))
- WISE 0049+0441 (L9)
- WISE 0206+2640 (L9 pec (red))
- WISE 1311+3629 (L5 pec (blue))
- WISE 1348+6603 (L9)
- WISE 1647+5632 (L9 pec (red))
- WISE 1830+4542 (L9)
- WISE 2327−2730 (L9)
- WISE 1800+0134 (L7.5)
- WISE 0047+6803 (L7.5 pec)
- WISE 0106+1518 (M8 pec)
References
edit- ^ a b c d e f g h i j k l m n o p q r s t u Castro, Philip J.; Gizis, John E. (2012). "Discovery of a Late L Dwarf: WISEP J060738.65+242953.4". The Astrophysical Journal. 746 (1): 3. arXiv:1110.4351. Bibcode:2012ApJ...746....3C. doi:10.1088/0004-637X/746/1/3. S2CID 119271171.
- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ "2MASS J06073908+2429574 -- Infrared source". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-12-24.
- ^ a b Gizis, John E.; Burgasser, Adam J.; Faherty, Jacqueline K.; Castro, Philip J.; Shara, Michael M. (2011). "WISEP J180026.60+013453.1: A nearby late-L Dwarf near the Galactic Plane". The Astronomical Journal. 142 (5): 171. arXiv:1109.0054. Bibcode:2011AJ....142..171G. doi:10.1088/0004-6256/142/5/171. S2CID 118596629.
- ^ Route, Matthew (July 10, 2017). "Is WISEP J060738.65+242953.4 Really A Magnetically Active, Pole-on L Dwarf?". The Astrophysical Journal. 843 (2): 115. arXiv:1706.03010. Bibcode:2017ApJ...843..115R. doi:10.3847/1538-4357/aa78ab. S2CID 119056418.