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    WASP-29

    From Wikipedia - Reading time: 6 min
    WASP-29
    Observation data
    Epoch J2000      Equinox J2000
    Constellation Phoenix
    Right ascension 23h 51m 31.08391s[1]
    Declination −39° 54′ 24.2582″[1]
    Apparent magnitude (V) 11.33[2]
    Characteristics
    WASP-29A
    Evolutionary stage main sequence star
    Spectral type K4V[3]
    B−V color index 0.82
    J−H color index 0.478
    J−K color index 0.570
    WASP-29B
    Spectral type M3V[3]
    Astrometry
    Radial velocity (Rv)24.31±0.20[1] km/s
    Proper motion (μ) RA: −56.767(14) mas/yr[1]
    Dec.: −88.988(13) mas/yr[1]
    Parallax (π)11.4349 ± 0.0151 mas[1]
    Distance285.2 ± 0.4 ly
    (87.5 ± 0.1 pc)
    Position (relative to WASP-29A)[3]
    ComponentWASP-29B
    Epoch of observation2021
    Angular distance125.2″
    Projected separation10994 AU
    Details[4]
    WASP-29A
    Mass0.825±0.033 M☉
    Radius0.808±0.044 R☉
    Surface gravity (log g)4.5±0.2 cgs
    Temperature4800±150 K
    Metallicity [Fe/H]0.11±0.14 dex
    Rotational velocity (v sin i)1.50±0.60 km/s
    Age14+0
    −7     Gyr
    WASP-29B
    Mass0.38[3] M☉
    Other designations
    CD−40 15273, TOI-192, TIC 183537452, WASP-29, TYC 8015-1020-1, 2MASS J23513108-3954241, DENIS J235131.0-395423[2]
    WASP-29A: Gaia DR3 6534414719318886144
    WASP-29B: Gaia DR3 6534426740931264896
    Database references
    SIMBADdata

    WASP-29 is a binary star system 285 light-years (87 parsecs) away in the constellation of Phoenix. The primary star is a K-type main-sequence star. Its comoving companion, a red dwarf star, was discovered in 2021.[3] The star system kinematically belongs to the thin disk of the Milky Way.[5] The primary is an old star with small starspot activity and low x-ray flux.[6]

    Planetary system[edit]

    The "hot Saturn" class planet WASP-29b was discovered around WASP-29 in 2010.[5] The planet would have an equilibrium temperature of 960±30 K.[7] The planetary atmosphere has abundant carbon monoxide but likely lacks methane[8] and sodium,[9] although the high and dense cloud deck of WASP-29b prevents high-quality spectroscopic measurements.[10]

    A study in 2018 revealed the stability of planetary orbits in the habitable zone of WASP-29 is significantly affected by the WASP-29b planet.[11]

    The WASP-29 planetary system[7]
    Companion
    (in order from star)     		Mass Semimajor axis
    (AU)     		Orbital period
    (days)     		Eccentricity Inclination Radius
    b 0.243+0.020
    −0.019     MJ     		0.0470±0.0025 3.92271218(25) <0.059[4] 89.468+0.018
    −0.017    °     		0.775±0.031 RJ

    References[edit]

    1. ^ a b c d e 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.
    2. ^ a b "WASP-29". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 November 2023.
    3. ^ a b c d e Fontanive, Clémence; Daniella Bardalez Gagliuffi (2021), "The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search", Frontiers in Astronomy and Space Sciences, 8: 16, arXiv:2101.12667, Bibcode:2021FrASS...8...16F, doi:10.3389/fspas.2021.625250
    4. ^ a b Bonomo, A. S.; Desidera, S.; et al. (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. S2CID 118923163.
    5. ^ a b Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Lendl, M.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Brown, D. J. A.; Enoch, B.; Lister, T. A.; Pepe, F.; Pollacco, D.; Ségransan, D.; Udry, S. (2010). "WASP-29b: A SATURN-SIZED TRANSITING EXOPLANET". The Astrophysical Journal. 723 (1): L60–L63. arXiv:1009.5318. Bibcode:2010ApJ...723L..60H. doi:10.1088/2041-8205/723/1/L60. S2CID 64119308.
    6. ^ Dos Santos, L. A.; Bourrier, V.; Ehrenreich, D.; Sanz-Forcada, J.; López-Morales, M.; Sing, D. K.; García Muñoz, A.; Henry, G. W.; Lavvas, P.; Lecavelier Des Etangs, A.; Mikal-Evans, T.; Vidal-Madjar, A.; Wakeford, H. R. (2021), "HST PanCET program: Non-detection of atmospheric escape in the warm Saturn-sized planet WASP-29 B", Astronomy & Astrophysics, 649: A40, arXiv:2103.15688, Bibcode:2021A&A...649A..40D, doi:10.1051/0004-6361/202140491, S2CID 232417342
    7. ^ a b Saha, Suman; Sengupta, Sujan (2021), "Critical Analysis of Tess Transit Photometric Data: Improved Physical Properties for Five Exoplanets", The Astronomical Journal, 162 (5): 221, arXiv:2109.11366, Bibcode:2021AJ....162..221S, doi:10.3847/1538-3881/ac294d, S2CID 237605336
    8. ^ Matthew Hardin, Joseph Harrington, K. Stevenson, "WASP-29b: Another Cool Exoplanet With Abundant CO?"
    9. ^ A Gemini ground-based transmission spectrum of WASP-29b: a featureless spectrum from 515 to 720 nm
    10. ^ Wong, Ian; Chachan, Yayaati; Knutson, Heather A.; Henry, Gregory W.; Adams, Danica; Kataria, Tiffany; Benneke, Björn; Gao, Peter; Deming, Drake; López-Morales, Mercedes; Sing, David K.; Alam, Munazza K.; Ballester, Gilda E.; Barstow, Joanna K.; Buchhave, Lars A.; Dos Santos, Leonardo A.; Fu, Guangwei; Muñoz, Antonio García; MacDonald, Ryan J.; Mikal-Evans, Thomas; Sanz-Forcada, Jorge; Wakeford, Hannah R. (2022), "The Hubble PanCET Program: A Featureless Transmission Spectrum for WASP-29b and Evidence of Enhanced Atmospheric Metallicity on WASP-80b", The Astronomical Journal, 164 (1): 30, arXiv:2205.10765, Bibcode:2022AJ....164...30W, doi:10.3847/1538-3881/ac7234, S2CID 248987053
    11. ^ Georgakarakos, Nikolaos; Eggl, Siegfried; Dobbs-Dixon, Ian (April 2018). "Giant Planets: Good Neighbors for Habitable Worlds?". The Astrophysical Journal. 856 (2): 155. arXiv:1804.02183. Bibcode:2018ApJ...856..155G. doi:10.3847/1538-4357/aaaf72.
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