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PDS 110 is a young 11th magnitude star located approximately 1,090 light-years (335 pc)[2] away in the constellation Orion. In 2017, it was discovered that the star is orbited by an exoplanet or brown dwarf with a disk of dust around it.
 PDS 110 Credit: Two Micron All Sky Survey (2MASS) | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 23m 31.008s |
| Declination | –01° 04′ 23.68″ |
| Apparent magnitude (V) | 10.4 |
| Characteristics | |
| Spectral type | keF6IVeb[1][2] |
| Astrometry | |
| Proper motion (μ) | RA: 1.146 ± 1.067[2] mas/yr Dec.: −0.338 ± 1.076[2] mas/yr |
| Parallax (π) | 2.91 ± 0.34 mas[2] |
| Distance | 1035[2] ly (335[2] pc) |
| Absolute magnitude (MV) | +2.54[2] |
| Details | |
| Mass | 3.0[3] M☉ |
| Radius | 2.23[2] R☉ |
| Luminosity (bolometric) | 7.76[2] L☉ |
| Surface gravity (log g) | 3.8[2] cgs |
| Temperature | 6,653[3] K |
| Metallicity [Fe/H] | +0.06[2] dex |
| Age | 10[3] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Description
PDS 110 is a young star still approaching the main sequence. It has been classified as a T Tauri star,[4] or as a pre-main sequence star.[3] The emission lines indicative of a T Tauri classification are somewhat weaker than a typical T Tauri star, interpreted as a post-T Tauri stage.[3]
Dust disk around secondary object
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.8-70 MJ | 2 | 808 ± 2 | — | — | — |
Brightness measurements from SuperWASP and KELT showed two similar reductions in brightness in November 2008 and January 2011, both with a maximal luminosity reduction of 30% and a duration of 25 days. These events were interpreted as transits of a structure with a period of 808 ± 2 days, corresponding to an orbital distance of about 2 AU. The large reduction in brightness could have happened due to a planet or brown dwarf with a circum-secondary disk of dust with a radius of 0.3 AU around a central object with a mass between 1.8 and 70 times the mass of Jupiter. Another transit was predicted for September 2017,[2] but nothing similar to the previous events was seen, ruling out a periodic event.[5]
See also
- Disrupted planet
- List of stars that dim oddly
- Planetary rings
- V1400 Centauri
References
- Miroshnichenko, A. S.; Gray, R. O.; Vieira, S. L. A.; Kuratov, K. S.; Bergner, Yu. K. (1999). "Observations of recently recognized candidate Herbig Ae/Be stars". Astronomy and Astrophysics. 347: 137. Bibcode:1999A&A...347..137M.
- Osborn, H. P.; et al. (2017). "Periodic Eclipses of the Young Star PDS 110 Discovered with WASP and KELT Photometry". Monthly Notices of the Royal Astronomical Society. 471 (1): 740–749. arXiv:1705.10346. Bibcode:2017MNRAS.471..740O. doi:10.1093/mnras/stx1249. S2CID 119450480.
- Rojas, G.; Gregorio-Hetem, J.; Hetem, A. (2008). "Towards the main sequence: Detailed analysis of weak line and post-T Tauri stars". Monthly Notices of the Royal Astronomical Society. 387 (3): 1335. Bibcode:2008MNRAS.387.1335R. doi:10.1111/j.1365-2966.2008.13355.x.
- Gregorio-Hetem, J.; Hetem, A. (2002). "Classification of a selected sample of weak T Tauri stars". Monthly Notices of the Royal Astronomical Society. 336 (1): 197–206. Bibcode:2002MNRAS.336..197G. doi:10.1046/j.1365-8711.2002.05716.x.
- PDS 110 Observing Campaign - Monitoring the potential September 2017 eclipse of young star PDS 110.
External links
На других языках
- [en] PDS 110
[ru] PDS 110
PDS 110 — молодая звезда 11-й звёздной величины, находящаяся на расстоянии около 1100 световых лет в созвездии Ориона. В 2017 году была обнаружено, что вокруг звезды обращается экзопланета или коричневый карлик, вокруг которого существует пылевой диск.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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