PDS 110

PDS 110

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[2] mas
Distanceapprox. 1,100 ly
(approx. 340 pc)
Absolute magnitude (MV)+2.54[2]
Details
Mass3.0[3] M☉
Radius2.23[2] R☉
Luminosity (bolometric)7.76[2] L☉
Surface gravity (log g)3.8[2] cgs
Temperature6,653[3] K
Metallicity [Fe/H]+0.06[2] dex
Age10[3] Myr
Other designations
HD 290380, IRAS 05209-0107, GLMP 91, 2MASS J05233100-0104237, TYC 4753-1534-1
Database references
SIMBADdata

PDS 110 is a young 11th magnitude star located approximately 1,100 light years 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.

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

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

References

  1. ↑ 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.
  2. 1 2 3 4 5 6 7 8 9 10 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: 740–749. arXiv:1705.10346 [astro-ph.EP]. Bibcode:2017MNRAS.471..740O. doi:10.1093/mnras/stx1249. Cite uses deprecated parameter |class= (help)
  3. 1 2 3 4 5 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.
  4. ↑ Gregorio-Hetem, J.; Hetem, A. (2002). "Classification of a selected sample of weak T Tauri stars". Monthly Notices of the Royal Astronomical Society. 336: 197. Bibcode:2002MNRAS.336..197G. doi:10.1046/j.1365-8711.2002.05716.x.
  5. ↑ PDS 110 Observing Campaign - Monitoring the potential September 2017 eclipse of young star PDS 110
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