Astronomy:Kepler-429

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Short description: Subdwarf B star
Kepler-429
Observation data
Equinox J2000.0]] (ICRS)
Constellation Lyra[1]
Right ascension  19h 09m 33.4137s[2]
Declination +46° 59′ 04.108″[2]
Apparent magnitude (V) 14.69 (var.)[3]
Characteristics
Evolutionary stage Subdwarf B star
Spectral type sdB[4]
Apparent magnitude (J) 16.36±0.10[4]
Variable type V361 Hya[3]
Astrometry
Proper motion (μ) RA: 1.133[2] mas/yr
Dec.: −5.907[2] mas/yr
Parallax (π)0.5573 ± 0.0372[2] mas
Distance5,900 ± 400 ly
(1,800 ± 100 pc)
Details
Mass0.47[5] M☉
Radius0.24[5] R☉
Luminosity3.54[6] L☉
Surface gravity (log g)5.35[6] cgs
Temperature27,500[5] K
Metallicity [Fe/H]0.0[5] dex
Other designations
Gaia DR2 2130473176626619136, Kepler-429, KIC 10001893, 2MASS J19093340+4659041[4]
Database references
SIMBADdata
Exoplanet Archivedata

Kepler-429 (KIC 10001893) is a variable subdwarf B star in the constellation Lyra, about 5,900 light years away.

The brightness of Kepler-429 changes unpredictably by up to 0.13 magnitudes.[3] It has been classified as a V361 Hydrae variable, but also as a V1093 Herculis variable, which typically has slower variations and a cooler temperature. Over 100 pulsation modes were identified with periods from 256 seconds to over three hours.[7]

Planetary system

Kepler-429 has been reported to have three possible exoplanets,[8] though their existence is questioned.[9] They were detected by orbital brightness modulation.[10]

The KIC 10001893 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (unconfirmed) — 0.005541 0.21970 0[12] — —
c (unconfirmed) — 0.007197 0.32528 0[13] — —
d (unconfirmed) — 0.01324 0.81161 0[14] — —

See also

References

  1. ↑ Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. http://djm.cc/constellation.html. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 Jayasinghe, T; Kochanek, C S; Stanek, K Z; Shappee, B J; Holoien, T W-S; Thompson, Toda A; Prieto, J L; Dong, Subo et al. (1 July 2018). "The ASAS-SN catalogue of variable stars I: The Serendipitous Survey". Monthly Notices of the Royal Astronomical Society 477 (3): 3145–3163. doi:10.1093/mnras/sty838. ISSN 0035-8711. Bibcode: 2018MNRAS.477.3145J. 
  4. ↑ 4.0 4.1 4.2 "Kepler-429 -- Hot subdwarf". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Kepler-429. 
  5. ↑ 5.0 5.1 5.2 5.3 Mathur, Savita; Huber, Daniel; Batalha, Natalie M.; Ciardi, David R.; Bastien, Fabienne A.; Bieryla, Allyson; Buchhave, Lars A.; Cochran, William D. et al. (2017). "Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run". The Astrophysical Journal Supplement Series 229 (2): 30. doi:10.3847/1538-4365/229/2/30. Bibcode: 2017ApJS..229...30M. 
  6. ↑ 6.0 6.1 Loyd, R. O. Parke; Shkolnik, Evgenya L.; Schneider, Adam C.; Richey-Yowell, Tyler; Barman, Travis S.; Peacock, Sarah; Pagano, Isabella (2020). "Current Population Statistics do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap". The Astrophysical Journal 890 (1): 23. doi:10.3847/1538-4357/ab6605. Bibcode: 2020ApJ...890...23L. 
  7. ↑ Uzundag, M.; Baran, A. S.; Østensen, R. H.; Reed, M. D.; Telting, J. H.; Quick, B. K. (2017). "KIC 10001893: A pulsating SDB star with multiple trapped modes". Monthly Notices of the Royal Astronomical Society 472 (1): 700. doi:10.1093/mnras/stx2011. Bibcode: 2017MNRAS.472..700U. 
  8. ↑ Silvotti, R.; Charpinet, S.; Green, E.; Fontaine, G.; Telting, J. H.; Østensen, R. H.; Van Grootel, V.; Baran, A. S. et al. (2014). "Keplerdetection of a new extreme planetary system orbiting the subdwarf-B pulsator KIC 10001893". Astronomy & Astrophysics 570: A130. doi:10.1051/0004-6361/201424509. Bibcode: 2014A&A...570A.130S. 
  9. ↑ Blokesz, A. (July 2019). "Analysis of putative exoplanetary signatures found in light curves of two sdBV stars observed by Kepler". Astronomy & Astrophysics 627: A86. doi:10.1051/0004-6361/201835003. Bibcode: 2019A&A...627A..86B. 
  10. ↑ "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". https://exoplanets.nasa.gov/eyes-on-exoplanets/#/system/KIC_10001893/. 
  11. ↑ "KIC 10001893". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=KIC+10001893. 
  12. ↑ "Eyes On Exoplanets – Exoplanet Exploration: Planets Beyond our Solar System". https://exoplanets.nasa.gov/eyes-on-exoplanets/#/planet/KIC_10001893_b/. 
  13. ↑ "Eyes on Exoplanets-KIC 10001893 c". https://exoplanets.nasa.gov/eyes-on-exoplanets/#/planet/KIC_10001893_c/. 
  14. ↑ "Eyes on Exoplanets-KIC 10001893 d". https://exoplanets.nasa.gov/eyes-on-exoplanets/#/planet/KIC_10001893_d/. 



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