Loading
  • 21 Aug, 2019

  • By, Wikipedia

HD 108236 B

HD 108236 is a G-type main-sequence star. Its surface temperature is 5660±61 K. HD 108236 is severely depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.28±0.04 (52% of the Solar System), and is probably older than the Sun at an age of 6.7
−3.4
billion years.

According to WISE mission data, the star was suspected to be surrounded by a debris disk, but a reanalysis of the data rejected the debris disk hypothesis by 2014. The reason for the false positive was contamination from a nearby infrared source.

Planetary system

HD 108236's planets

In 2020, four planets orbiting HD 108236 were discovered by the transit method, followed by another one in 2021.

The HD 108236 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 4.23
−0.39
 M🜨
0.0451±0.0004 3.7958785
−0.0000070
0.067
−0.026
88.23±0.32° 1.587±0.028 R🜨
c 8.90
−0.64
 M🜨
0.0626±0.0006 6.2036717
−0.0000100
0.091
−0.033
88.8±0.2° 2.122±0.025 R🜨
d 7.75
−0.62
 M🜨
0.1087±0.0010 14.175818
−0.000023
0.075
−0.022
88.8±0.1° 2.629±0.031 R🜨
e 8.2
−1.2
 M🜨
0.1348±0.0012 19.5901277±0.000030 0.073
−0.017
89.3±0.1° 3.008±0.032 R🜨
f 3.95
−0.32
 M🜨
0.1773±0.0016 29.53935
−0.00014
0.024
−0.016
89.07±0.03° 1.89±0.04 R🜨

See also

References

  1. ^ "HD 108236". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-17.
  2. ^ 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.
  3. ^ Hoyer, S.; et al. (2022), "Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet", Astronomy & Astrophysics, 668: A117, arXiv:2210.08912, Bibcode:2022A&A...668A.117H, doi:10.1051/0004-6361/202243720, S2CID 252832042
  4. ^ Patel, Rahul I.; Metchev, Stanimir A.; Heinze, Aren (2014), "A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood Through Precise Calibration of Saturated Wise Photometry", The Astrophysical Journal Supplement Series, 212 (1): 10, arXiv:1403.3435, Bibcode:2014ApJS..212...10P, doi:10.1088/0067-0049/212/1/10, S2CID 119219094
  5. ^ Patel, Rahul I.; Metchev, Stanimir A.; Heinze, Aren; Trollo, Joseph (2016), "The Faintest WISE debris Disks: Enhanced Methods for Detection and Verification", The Astronomical Journal, 153 (2): 54, arXiv:1612.04818, Bibcode:2017AJ....153...54P, doi:10.3847/1538-3881/153/2/54, S2CID 3006490
  6. ^ Daylan, Tansu; Pingle, Kartik; Wright, Jasmine; Guenther, Maximilian N.; Stassun, Keivan G.; Kane, Stephen R.; Vanderburg, Andrew; Jontof-Hutter, Daniel; Rodriguez, Joseph E.; Shporer, Avi; Huang, Chelsea; Mikal-Evans, Tom; Badenas-Agusti, Mariona; Collins, Karen A.; Rackham, Benjamin; Quinn, Sam; Cloutier, Ryan; Collins, Kevin I.; Guerra, Pere; Jensen, Eric L. N.; Kielkopf, John F.; Massey, Bob; Schwarz, Richard P.; Charbonneau, David; Lissauer, Jack J.; Irwin, Jonathan M.; Basturk, Ozgur; Fulton, Benjamin; Soubkiou, Abderahmane; et al. (2021). "TESS Discovery of a Super-Earth and Three Sub-Neptunes Hosted by the Bright, Sun-like Star HD 108236". The Astronomical Journal. 161 (2): 85. arXiv:2004.11314. Bibcode:2021AJ....161...85D. doi:10.3847/1538-3881/abd73e. S2CID 216080635.
  7. ^ Bonfanti, A.; Delrez, L.; Hooton, M. J.; Wilson, T. G.; Fossati, L.; Alibert, Y.; Hoyer, S.; Mustill, A. J.; Osborn, H. P.; Adibekyan, V.; Gandolfi, D.; Salmon, S.; Sousa, S. G.; Tuson, A.; Van Grootel, V.; Cabrera, J.; Nascimbeni, V.; Maxted, P. F. L.; Barros, S. C. C.; Billot, N.; Bonfils, X.; Borsato, L.; Broeg, C.; Davies, M. B.; Deleuil, M.; Demangeon, O. D. S.; Fridlund, M.; Lacedelli, G.; Lendl, M.; et al. (2021). "CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii". Astronomy & Astrophysics. 646: A157. arXiv:2101.00663. Bibcode:2021A&A...646A.157B. doi:10.1051/0004-6361/202039608. S2CID 230437723.