KELT-6b

KELT-6b

KELT-6b (white) compared to Jupiter
Discovery[1]
Discovered by	Collins et al.
Discovery site	KELTNorth
Discovery date	2014
Detection method	Transit
Orbital characteristics
Semi-major axis	0.0804±0.0014 AU[2]
Eccentricity	0.22±0.11[3]
Orbital period (sidereal)	7.8457±0.0002 d[3]
Inclination	88.81°±0.85°[3]
Time of perihelion	2,456,269.2+1.7 −2.5 JD[1]
Argument of perihelion	308°+30° −272°[4]
Semi-amplitude	42.8±4.3 km/s[3]
Star	KELT-6
Physical characteristics
Mean radius	1.30±0.09 RJ[3]
Mass	0.442±0.019 MJ[4]
Mean density	0.333+0.120 −0.079 g/cm^3[2](0.012+0.004 −0.002 lb/cu in)
Temperature	1313+59 −38 K[1]

KELT-6b is an exoplanet orbiting the F-type subgiant KELT-6 approximately 791 light years away in the northern constellation Coma Berenices. It was discovered in 2013 using the transit method, and was announced in 2014.

Discovery

In 2014, the planet's parameters were observed. The paper states that KELT-6 has just entered the subgiant phase, and is no longer on the main sequence. In 2015, an additional planet, c, was discovered using the radial velocity method.[4]

Properties

KELT-6b is a hot Saturn with 44.2% Jupiter's mass, but has been bloated to 1.3 times Jupiter's radius. Its density is half of Saturn's, and it has an equilibrium temperature of 1,313 K, but a hotter dayside temperature of 1,531 K.[5]

References

1. 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; Bieryla, Allyson; Latham, David W.; Fulton, Benjamin J.; Gregorio, Joao; Buchhave, Lars A.; Jensen, Eric L. N.; Stassun, Keivan G.; Penev, Kaloyan; Crepp, Justin R.; Hinkley, Sasha; Street, Rachel A.; Cargile, Phillip; Mack, Claude E.; Oberst, Thomas E.; Avril, Ryan L.; Mellon, Samuel N.; McLeod, Kim K.; Penny, Matthew T.; Stefanik, Robert P.; Berlind, Perry; Calkins, Michael L.; Mao, Qingqing; Richert, Alexander J. W.; DePoy, Darren L.; Esquerdo, Gilbert A.; Gould, Andrew; Marshall, Jennifer L.; Oelkers, Ryan J.; Pogge, Richard W.; Trueblood, Mark; Trueblood, Patricia (1 February 2014). "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.
2. 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 and Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. ISSN 0004-6361. S2CID 118923163.
3. Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (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.
4. 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. S2CID 119114846.
5. "KELT-6 b". www.exoplanetkyoto.org. Retrieved 2021-08-13.