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WASP-63 - Wikipedia

Coordinates:

06^h 17^m 20.7486^s, −38° 19′ 23.7542″

From Wikipedia, the free encyclopedia

WASP-63
Observation data Epoch J2000 Equinox J2000
Constellation	Columba
Right ascension	06^h 17^m 20.7485^s^[1]
Declination	−38° 19′ 23.754″^[1]
Apparent magnitude (V)	11.10±0.08^[2]
Characteristics
Evolutionary stage	subgiant^[1]^[2]
Spectral type	G8^[3]
B−V color index	0.741±0.022^[4]
J−K color index	0.425±0.032^[4]
Astrometry

Radial velocity (R_v)	−23.55±0.25^[1] km/s
Proper motion (μ)	RA: −17.469 mas/yr^[1] Dec.: −27.292 mas/yr^[1]
Parallax (π)	3.4609 ± 0.0118 mas^[1]
Distance	942 ± 3 ly (288.9 ± 1.0 pc)

Details

Mass	1.10^+0.06 _−0.04^[5] `M`_☉
Radius	1.76^+0.11 _−0.08^[5] `R`_☉
Luminosity	2.76^[1] `L`_☉
Surface gravity (log g)	4.01±0.03^[6] cgs
Temperature	5715±60^[6] K
Metallicity [Fe/H]	0.08±0.07 dex^[5] 0.28±0.05^[6] dex
Rotational velocity (v sin i)	2.8±0.5^[5] km/s
Age	8.3^+1.3 _−1.2^[5] Gyr

Other designations
Kosjenka, CD−38 2551, TOI-483, WASP-63, TYC 7612-556-1, GSC 07612-00556, 2MASS J06172074-3819237^[7]
Database references
SIMBAD	data

WASP-63 or Kosjenka, also known as CD-38 2551, is a single star with an exoplanetary companion in the southern constellation of Columba. It is too faint to be visible with the naked eye, having an apparent visual magnitude of 11.1.^[2] The distance to this system is approximately 942 light-years (289 parsecs) based on parallax measurements, but it is drifting closer with a radial velocity of −24 km/s.

Nomenclature

The designation WASP-63 indicates that this was the 63rd star found to have a planet by the Wide Angle Search for Planets.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.^[8] The approved names, proposed by a team from Croatia, were announced in June 2023. WASP-63 is named Kosjenka and its planet is named Regoč, after characters from Croatian Tales of Long Ago by Ivana Brlić-Mažuranić.^[9]

Stellar properties

This is a G-type star with a stellar classification of G8;^[3] the luminosity class is currently unknown. The star is much older than the Sun at approximately 8.3^+1.3
_−1.2 billion years. WASP-63 is slightly enriched in heavy elements, having 120% of the solar abundance of iron.^[5] The stellar radius is enlarged for a G8 star,^[3] and models suggest it has evolved into a subgiant star.^[1] It has 1.1 times the mass of the Sun and is spinning with a projected rotational velocity of 3 km/s.^[5]

Planetary system

In 2012 a transiting gas giant planet WASP-63b was detected on a tight, circular orbit.^[3] Its equilibrium temperature is 1536±37 K, and measured dayside temperature is 1547±308 K.^[10] The planet is similar to Saturn in mass but is highly inflated due to proximity to the parent star. The planetary atmosphere contains water and likely has a high cloud deck of indeterminate composition.^[11]

The WASP-63 planetary system^[5]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b / Regoč	0.339±0.03 $M$ _J	0.05417^+0.00067 _−0.00089	4.3780900±0.000006	0.026^+0.040 _−0.029	87.8±1.3°	1.33±0.24 $R$ _J

References

^ ^a ^b ^c ^d ^e ^f ^g ^h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b ^c Santos, N. C.; et al. (August 2013), "SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs. I. New atmospheric parameters and masses for 48 stars with planets", Astronomy & Astrophysics, 556: 11, arXiv:1307.0354, Bibcode:2013A&A...556A.150S, doi:10.1051/0004-6361/201321286, S2CID 55237847, A150.
^ ^a ^b ^c ^d Hellier, Coel; et al. (2012), "Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b", Monthly Notices of the Royal Astronomical Society, 426 (1): 739–750, arXiv:1204.5095, Bibcode:2012MNRAS.426..739H, doi:10.1111/j.1365-2966.2012.21780.x, S2CID 54713354
^ ^a ^b Brown, D. J. A. (2014), "Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?", Monthly Notices of the Royal Astronomical Society, 442 (2): 1844–1862, arXiv:1406.4402, Bibcode:2014MNRAS.442.1844B, doi:10.1093/mnras/stu950, S2CID 56052792.
^ ^a ^b ^c ^d ^e ^f ^g ^h Bonomo, A. S.; et al. (2017), "The GAPS Programme with HARPS-N at TNG", Astronomy & Astrophysics, 602: A107, arXiv:1704.00373, Bibcode:2017A&A...602A.107B, doi:10.1051/0004-6361/201629882, S2CID 118923163
^ ^a ^b ^c Stassun, Keivan G.; et al. (2016), "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, S2CID 119219062
^ "CD-38 2551". SIMBAD. Centre de données astronomiques de Strasbourg.
^ "List of ExoWorlds 2022". nameexoworlds.iau.org. IAU. 8 August 2022. Retrieved 27 August 2022.
^ "2022 Approved Names". nameexoworlds.iau.org. IAU. Retrieved 7 June 2023.
^ Garhart, Emily; et al. (2020), "Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer's Secondary Eclipses", The Astronomical Journal, 159 (4): 137, arXiv:1901.07040, Bibcode:2020AJ....159..137G, doi:10.3847/1538-3881/ab6cff, S2CID 119209434
^ Kilpatrick, Brian M.; et al. (2017), "Community Targets of JWST's Early Release Science Program: Evaluation of WASP-63b", The Astronomical Journal, 156 (3): 103, arXiv:1704.07421, Bibcode:2018AJ....156..103K, doi:10.3847/1538-3881/aacea7, S2CID 52831173

Constellation of Columba

Stars

Bayer	α (Phact) β (Wazn) γ δ ε η θ (Elkurud) κ λ (Tsze) μ ν¹ ν² ξ ο π¹ π² σ
Variable	WZ AF AP
HR	1721 1758 1835 1877 1958 2069 2082 2131 2149 2263 2288 2399 2411 2445 2446
HD	43848
Other	NGTS-1 NGTS-3 WASP-63

Exoplanets	NGTS-1b NGTS-3Ab NGTS-4b WASP-63b

Star clusters	NGC 1851

Galaxies

NGC	1792 1808 1989 1992 2090
Other	ESO 306-17 PKS 0521-365