KELT-6

Last updated
KELT-6
Observation data
Epoch J2000       Equinox J2000
Constellation Coma Berenices
Right ascension 13h 03m 55.65s [1]
Declination +30° 38′ 24.28″ [1]
Apparent magnitude  (V)10.34±0.05 [2]
Characteristics
Spectral type F8IV-V [2]
Astrometry
Radial velocity (Rv)1.62±0.27 [1] km/s
Proper motion (μ)RA: −5.106±0.052 mas/yr [1]
Dec.: +15.640±0.046 mas/yr [1]
Parallax (π)4.1255±0.0338  mas [1]
Distance 791 ± 6  ly
(242 ± 2  pc)
Details
Mass 1.13±0.06 [3]   M☉
Radius 1.53±0.14 [3]   R☉
Luminosity 3.25+0.94
−0.81 [2]   L☉
Surface gravity (log g)4.07±0.06 [4]   cgs
Temperature 6,272±61 [3]   K
Metallicity [Fe/H]-0.28 [4]   dex
Rotational velocity (v sin i)4.53±0.26 [5]  km/s
Age 4.9+0.7
−0.5 [3]   Gyr
Other designations
BD+31 2447, Gaia DR2 1464700950221781504
Database references
SIMBAD data
Exoplanet Archive data

KELT-6, also known as BD+31 2447, is a star in the constellation Coma Berenices. With an apparent magnitude of 10.34, it is impossible to see with the unaided eye, but can be seen with a powerful telescope. The star is located 791 light years away from the Solar System based on parallax, but is drifting away with a radial velocity of 1.62 km/s.

Contents

Properties

KELT-6 is an F-type star that is 13% more massive and 53% larger than the Sun. It radiates at 3.25 times the Sun's luminosity from its photosphere at an effective temperature of 6,727 K. KELT-6 has a projected rotational velocity of 4.53 km/s, and is slightly older than the Sun, with an age of 4.9 billion years. Unlike most host stars of exoplanets, it has a poor metallicity, with 52.5% the abundance of heavy metals compared to the Sun.

Planetary system

In 2013, a long period "hot Jupiter" was discovered orbiting the star using the transit method. [2] Another planet was discovered in 2015 using the radial velocity (doppler spectroscopy) method. [5]

The KELT-6 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.44±0.02 [3]   MJ 0.08±0.00 [3] 7.85±0.00 [3] 0.22±0.11 [4] 88.81±0.85 [4] ° 1.18±0.11 [3]   RJ
c 3.71±0.21 [5]   MJ 2.39±0.11 [5] 1,276+81
−67 [5] 		0.21±0.04 [5] ——

See also

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data 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 source at VizieR.
  2. 1 2 3 4 Collins, Karen A.; Eastman, Jason D.; Beatty, Thomas G.; Siverd, Robert J.; Gaudi, B. Scott; Pepper, Joshua; Kielkopf, John F.; Johnson, John Asher; Howard, Andrew W.; Fischer, Debra A.; Manner, Mark (2014-02-01). "KELT-6b: A P ~ 7.9 Day Hot Saturn Transiting a Metal-poor Star with a Long-period Companion". The Astronomical Journal. 147 (2): 39. arXiv: 1308.2296 . Bibcode:2014AJ....147...39C. doi:10.1088/0004-6256/147/2/39. ISSN   0004-6256. S2CID   15020416.
  3. 1 2 3 4 5 6 7 8 Bonomo, A. S.; Desidera, S.; Benatti, S.; Borsa, F.; Crespi, S.; Damasso, M.; Lanza, A. F.; Sozzetti, A.; Lodato, G.; Marzari, F.; Boccato, C.; Claudi, R. U.; Cosentino, R.; Covino, E.; Gratton, R.; Maggio, A.; Micela, G.; Molinari, E.; Pagano, I.; Piotto, G.; Poretti, E.; Smareglia, R.; Affer, L.; Biazzo, K.; Bignamini, A.; Esposito, M.; Giacobbe, P.; Hébrard, G.; Malavolta, L.; Maldonado, J.; Mancini, L.; Martinez Fiorenzano, A.; Masiero, S.; Nascimbeni, V.; Pedani, M.; Rainer, M.; Scandariato, G. (June 2017). "The GAPS Programme with HARPS-N at TNG: XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets⋆". Astronomy & Astrophysics. 602: A107. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi: 10.1051/0004-6361/201629882 .
  4. 1 2 3 4 Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (1 March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal. 153 (3): 136. arXiv: 1609.04389 . Bibcode:2017AJ....153..136S. doi: 10.3847/1538-3881/aa5df3 . ISSN   0004-6256. S2CID   119219062.
  5. 1 2 3 4 5 6 Damasso, M.; Esposito, M.; Nascimbeni, V.; Desidera, S.; Bonomo, A. S.; Bieryla, A.; Malavolta, L.; Biazzo, K.; Sozzetti, A.; Covino, E.; Latham, D. W.; Gandolfi, D.; Rainer, M.; Petrovich, C.; Collins, K. A.; Boccato, C.; Claudi, R. U.; Cosentino, R.; Gratton, R.; Lanza, A. F.; Maggio, A.; Micela, G.; Molinari, E.; Pagano, I.; Piotto, G.; Poretti, E.; Smareglia, R.; Di Fabrizio, L.; Giacobbe, P.; Gomez-Jimenez, M.; Murabito, S.; Molinaro, M.; Affer, L.; Barbieri, M.; Bedin, L. R.; Benatti, S.; Borsa, F.; Maldonado, J.; Mancini, L.; Scandariato, G.; Southworth, J.; Zanmar Sanchez, R. (1 September 2015). "The GAPS programme with HARPS-N at TNG. IX. The multi-planet system KELT-6: Detection of the planet KELT-6 c and measurement of the Rossiter-McLaughlin effect for KELT-6 b". Astronomy and Astrophysics. 581: L6. arXiv: 1508.06520 . Bibcode:2015A&A...581L...6D. doi: 10.1051/0004-6361/201526995 . ISSN   0004-6361.
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