HD 106906
 Star map shows star position on the northern edge of the constellation Crux | |
| Observation data EpochJ2000.0EquinoxJ2000.0 | |
|---|---|
| Constellation | Crux |
| Right ascension | 12h17m53.191430s[1] |
| Declination | −55° 58′ 31.8904″[1] |
| Apparent magnitude(V) | 7.80[2] |
| Characteristics | |
| Spectral type | F5 V[3] |
| B−Vcolor index | 0.458±0.003[2] |
| Astrometry | |
| Radial velocity(Rv) | +10.2±1.7[2]km/s |
| Proper motion(μ) | RA:−39.014[1]mas/yr Dec.:−12.872[1]mas/yr |
| Parallax(π) | 9.6774 ± 0.0429mas[1] |
| Distance | 337 ± 1ly (103.3 ± 0.5pc) |
| Absolute magnitude(MV) | 2.99[2] |
| Details | |
| Radius | 2.03+0.11 −0.10[1]R☉ |
| Luminosity | 6.56±0.04[1]L☉ |
| Temperature | 6,484+157 −168[1]K |
| Metallicity[Fe/H] | −0.04±0.08[2]dex |
| Age | 13±2[4]Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 106906is abinary star[6]system in the southernconstellationofCrux.It is too faint to be visible to the naked eye, having a combinedapparent visual magnitudeof 7.80.[2]The distance to this system is approximately 337light yearsbased onparallax,and it is receding from the Sun with aradial velocityof +10 km/s.[2]It is a member of the Lower Centaurus–Crux group of theScorpius–Centaurus OB associationof co-moving stars.[4]
This is a double-linedspectroscopic binarysystem consisting of twoF-type main-sequence starswith similar masses and a matchingstellar classificationof F5 V.[6]Theirorbital periodis less than 100 days.[4]
Planetary system
[edit]
A distant circumbinary planet—HD 106906 b—is orbiting the pair at aprojected separationof732±30AUwith a period of at least 3,000 years. An infrared excess around the binary is coming from a circumstellardebris diskthat is being viewed edge-on. This has a pronounced asymmetrical shape, extending 120 AU on the east side and out to 550 AU to the west.[4]Planetary orbit is inclined to the debris disk by 39+20
−15degrees, and planet itself is visible nearly pole-on, having a largeaxial tilt.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| debris disk | 65–550AU | 84.65±0.35° | — | |||
| b | 11±2MJ | ~732±30 AU | >3000 | — | 64° | — |
References
[edit]- ^abcdefghBrown, A. G. A.;et al. (Gaia collaboration) (August 2018)."GaiaData Release 2: Summary of the contents and survey properties ".Astronomy & Astrophysics.616.A1.arXiv:1804.09365.Bibcode:2018A&A...616A...1G.doi:10.1051/0004-6361/201833051.Gaia DR2 record for this sourceatVizieR.
- ^abcdefgAnderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation",Astronomy Letters,38(5): 331,arXiv:1108.4971,Bibcode:2012AstL...38..331A,doi:10.1134/S1063773712050015,S2CID119257644.
- ^Houk, Nancy; Cowley, A. P. (1979),Michigan catalogue of two-dimensional spectral types for the HD stars,vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan,Bibcode:1978mcts.book.....H.
- ^abcdRodet, L.; et al. (June 2017), "Origin of the wide-orbit circumbinary giant planet HD 106906. A dynamical scenario and its impact on the disk",Astronomy & Astrophysics,602:15,arXiv:1703.01857,Bibcode:2017A&A...602A..12R,doi:10.1051/0004-6361/201630269,S2CID119424481,A12.
- ^"HD 106906".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2020-01-30.
- ^abLagrange, A. -M.; et al. (February 2016), "A narrow, edge-on disk resolved around HD 106906 with SPHERE",Astronomy & Astrophysics,586:6,arXiv:1510.02511,Bibcode:2016A&A...586L...8L,doi:10.1051/0004-6361/201527264,S2CID4812512,L8.
- ^Bryan, Marta L.; Chiang, Eugene; Morley, Caroline V.; Mace, Gregory N.; Bowler, Brendan P. (2021), "Obliquity Constraints on the Planetary-mass Companion HD 106906 b",The Astronomical Journal,162(5): 217,arXiv:2108.13437,Bibcode:2021AJ....162..217B,doi:10.3847/1538-3881/ac1bb1,S2CID237364108
- ^Kalas, Paul G.; et al. (2015), "Direct Imaging of an Asymmetric Debris Disk in the Hd 106906 Planetary System",The Astrophysical Journal,814(1): 32,arXiv:1510.02747,Bibcode:2015ApJ...814...32K,doi:10.1088/0004-637X/814/1/32,S2CID59575201
