Astronomy:Kepler-411

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Short description: Binary star system in the constellation Cygnus
Kepler-411
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cygnus
Right ascension  19h 10m 25.34699s[1]
Declination +49° 31′ 23.7126″[1]
Apparent magnitude (V) 12.55[2]
Characteristics
Kepler-411A
Evolutionary stage main-sequence star
Spectral type K3V
Astrometry
Kepler-411A
Radial velocity (Rv)−20.40±0.77[1] km/s
Proper motion (μ) RA: 13.611[1] mas/yr
Dec.: 32.543[1] mas/yr
Parallax (π)6.5313 ± 0.0080[3] mas
Distance499.4 ± 0.6 ly
(153.1 ± 0.2 pc)
Kepler-411B
Proper motion (μ) RA: 13.263[3] mas/yr
Dec.: 33.008[3] mas/yr
Parallax (π)6.5727 ± 0.0573[3] mas
Distance496 ± 4 ly
(152 ± 1 pc)
Position (relative to Kepler-411A)[4]
ComponentKepler-411B
Epoch of observation2012
Angular distance3.4±0.06″
Position angle331±3°
Observed separation
(projected)		520 AU
Details
Kepler-411A
Mass0.75[1] M☉
Radius0.76[1] R☉
Luminosity0.27[1] L☉
Surface gravity (log g)4.58[1] cgs
Temperature4,773[1] K
Metallicity [Fe/H]0.11±0.1[5] dex
Rotation10.52 d[6]
Age0.212±0.031[7] Gyr
Kepler-411B
Mass0.33[8] M☉
Radius0.49[4] R☉
Temperature3,446[8] K
Other designations
Kepler-411A: KOI-1781, KIC 11551692, 2MASS J19102533+4931237[2]
Kepler-411B: Gaia DR3 2132768956904826624
Database references
SIMBADdata

Kepler-411 is a binary star system. Its primary star Kepler-411A is a K-type main-sequence star, orbited by the red dwarf star Kepler-411B on a wide orbit, discovered in 2012.[4]

Primary star

The primary star's surface temperature is 4,773 K. Kepler-411A is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of 0.11±0.1,[5] but is much younger at an age of 212±31 million years.[7]

Kepler-411A exhibits significant starspot activity, with starspots covering 1.7+0.3−0.2% of the stellar surface.[9] Darker starspots are concentrated around the equator of the star. Kepler-411A exhibits differential rotation, but with smaller amount of differential shear compared to the Sun.[6]

The companion Kepler-411B is 533 au away from Kepler-411A.[8] It is a red dwarf and a flare star.[10]

Planetary system

In 2013, one planet, named Kepler-411b, was discovered,[11] followed by planet Kepler-411c in 2016. Third planet in system detected by transit method, d, along with e detected by radial velocity method, were discovered in 2019.[12][7]


The Kepler-411 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b[13] 0.08055±0.00818 MJ 0.0375±0.0008 3.005156±0.000002 0.146+0.004−0.005 87.4±0.1° 0.214±0.005 RJ
c[14] 0.08306±0.01856 MJ 0.0739±0.001 7.834436247±0.000001137[15] 0.108+0.003−0.004 88.61±0.04° 0.394±0.006 RJ
d[16] 0.04782±0.01605 MJ 0.279±0.004 58.02023116±0.00004203[15] 0.128±0.003 89.43±0.02° 0.296±0.009 RJ
e[17] 0.03398±0.00346 MJ 0.186±0.003 31.509728±0.000085 0.016+0.002−0.001 88.04±0.02° —

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 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.
  2. ↑ 2.0 2.1 "Kepler-411". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-411. 
  3. ↑ 3.0 3.1 3.2 3.3 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.
  4. ↑ 4.0 4.1 4.2 Ziegler, Carl; Law, Nicholas M.; Baranec, Christoph; Riddle, Reed; Duev, Dmitry A.; Howard, Ward; Jensen-Clem, Rebecca; Kulkarni, S. R. et al. (2017), "Robo-AO Kepler survey. IV. The effect of nearby stars on 3857 planetary candidate systems", The Astronomical Journal 155 (4): 161, doi:10.3847/1538-3881/aab042 
  5. ↑ 5.0 5.1 Furlan, E.; Ciardi, D. R.; Cochran, W. D.; Everett, M. E.; Latham, D. W.; Marcy, G. W.; Buchhave, L. A.; Endl, M. et al. (2018), "The Kepler Follow-Up Observation Program. II. Stellar Parameters from Medium- and High-Resolution Spectroscopy", The Astrophysical Journal 861 (2): 149, doi:10.3847/1538-4357/aaca34, Bibcode: 2018ApJ...861..149F 
  6. ↑ 6.0 6.1 Araújo, Alexandre; Valio, Adriana (2021), "Kepler-411 differential rotation from three transiting planets", The Astrophysical Journal 907 (1): L5, doi:10.3847/2041-8213/abd3a7, Bibcode: 2021ApJ...907L...5A 
  7. ↑ 7.0 7.1 7.2 Lillo-Box, J.; Lopez, T. A.; Santerne, A.; Nielsen, L. D.; Barros, S. C. C.; Deleuil, M.; Acuña, L.; Mousis, O. et al. (2020), "Masses for the seven planets in K2-32 and K2-233. Four diverse planets in resonant chain and the first young rocky worlds", Astronomy & Astrophysics A48: 640, doi:10.1051/0004-6361/202037896, Bibcode: 2020A&A...640A..48L 
  8. ↑ 8.0 8.1 8.2 Mugrauer, M. (2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society 490 (4): 5088. doi:10.1093/mnras/stz2673. Bibcode: 2019MNRAS.490.5088M. 
  9. ↑ Morris, Brett M. (2020), "A relationship between stellar age and spot coverage", The Astrophysical Journal 893 (1): 67, doi:10.3847/1538-4357/ab79a0, Bibcode: 2020ApJ...893...67M 
  10. ↑ Jackman, James A. G.; Shkolnik, Evgenya; Loyd, R. O. Parke (2021). "Stellar flares from blended and neighbouring stars in Kepler short cadence observations". Monthly Notices of the Royal Astronomical Society 502 (2): 2033. doi:10.1093/mnras/stab166. Bibcode: 2021MNRAS.502.2033J. 
  11. ↑ Wang, Ji; Xie, Ji-Wei; Barclay, Thomas; Fischer, Debra A. (2013), "Influence of Stellar Multiplicity On Planet Formation. I. Evidence of Suppressed Planet Formation Due to Stellar Companions Within 20 AU and Validation of Four Planets From the Kepler Multiple Planet Candidates", The Astrophysical Journal 783 (1): 4, doi:10.1088/0004-637X/783/1/4, Bibcode: 2014ApJ...783....4W 
  12. ↑ Sun, L.; Ioannidis, P.; Gu, S.; Schmitt, J. H. M. M.; Wang, X.; Kouwenhoven, M. B. N. (2019), "Kepler-411: a four-planet system with an active host star", Astronomy & Astrophysics 624: A15, doi:10.1051/0004-6361/201834275, Bibcode: 2019A&A...624A..15S 
  13. ↑ "The Extrasolar Planet Encyclopaedia — Kepler-411 b". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_411_b--1407/. Retrieved 2022-09-27. 
  14. ↑ "The Extrasolar Planet Encyclopaedia — Kepler-411 c". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_411_c--3210/. Retrieved 2022-09-27. 
  15. ↑ 15.0 15.1 Battley, Matthew P et al. (10 March 2021). "Revisiting the Kepler field with TESS: Improved ephemerides using TESS 2 min data". Monthly Notices of the Royal Astronomical Society 503 (3): 4092–4104. doi:10.1093/mnras/stab701. Bibcode: 2021MNRAS.503.4092B. 
  16. ↑ "The Extrasolar Planet Encyclopaedia — Kepler-411 d". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_411_d--7030/. Retrieved 2022-09-27. 
  17. ↑ "The Extrasolar Planet Encyclopaedia — Kepler-411 e". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/kepler_411_e--7031/. Retrieved 2022-09-27. 

Coordinates: Sky map 19h 10m 25.3471s, +49° 31′ 23.7119″



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