WASP-34

WASP-34, also named Amansinaya,[6] is a sunlike star of spectral type G5V that has 1.01 ± 0.07 times the mass and 0.93 ± 0.12 times the diameter of the Sun. It rotates on its axis every 34 ± 15 days, indicating it is around 6.7 billion years old.[3]

HD 98219 / Amansinaya
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Crater
Right ascension 11h 01m 35.8979s[1]
Declination –23° 51′ 38.385″[1]
Apparent magnitude (V) +10.28[2]
Characteristics
Spectral type G5[3]
Astrometry
Proper motion (μ) RA: –43.900 ± 0.069[1] mas/yr
Dec.: –65.794 ± 0.069[1] mas/yr
Parallax (π)7.5418 ± 0.0484 mas[1]
Distance432 ± 3 ly
(132.6 ± 0.9 pc)
Details
Mass1.01[3] M☉
Radius0.93[3] R☉
Luminosity1.19[4] L☉
Surface gravity (log g)4.5[3] cgs
Temperature5,700[3] K
Metallicity [Fe/H]−0.02[3] dex
Rotational velocity (v sin i)0.5[5] km/s
Age6.80[4] Gyr
Other designations
CD-23 9677, DENIS J110135.9-235138, GSC 06636-00540, 2MASS J11013589-2351382, TYC 6636-540-1, Gaia DR2 3537110833333561728[1]
Database references
SIMBADdata

Planetary system

It has a planet 0.59 ± 0.01 times as massive as Jupiter that takes 4.317 days to complete an orbit.[3] Planetary color was found to be redder than usual, hinting on peculiar chemistry.[7] The planet has a large measured temperature difference between dayside (1185±47 K) and nightside (726±119 K).[8]

There is increasing evidence that there is a massive object orbiting the system further out.

The WASP-34 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b / Haik 0.56 MJ 0.0524 4.31768 0[7] — 1.22±0.08[7] RJ
c (unconfirmed) — — — — — —

Naming

In 2019 the IAU announced as part of NameExoWorlds that WASP-34 and its planet WASP-34b would be given official names chosen by school children from The Philippines.[9][10] The star is named Amansinaya, after Aman Sinaya, which is one of the two trinity deities of the Philippine's Tagalog mythology, and is the primordial deity of the ocean and protector of fisherman. The planet WASP-34b is named Haik. Haik is the successor of the primordial Aman Sinaya as the god of the sea of the Philippine's Tagalog mythology.[6]

References
  1. 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. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  3. Smalley, B.; Anderson, D. R.; Collier Cameron, A.; Hellier, C.; Lendl, M.; Maxted, P. F. L.; Queloz, D.; Triaud, A. H. M. J.; West, R. G.; Bentley, S. J.; Enoch, B.; Gillon, M.; Lister, T. A.; Pepe, F.; Pollacco, D.; Segransan, D.; Smith, A. M. S.; Southworth, J.; Udry, S.; Wheatley, P. J.; Wood, P. L.; Bento, J. (2011). "WASP-34b: a near-grazing transiting sub-Jupiter-mass exoplanet in a hierarchical triple system". Astronomy and Astrophysics. 526: 5. arXiv:1012.2278. Bibcode:2011A&A...526A.130S. doi:10.1051/0004-6361/201015992. S2CID 43519917. A130.
  4. Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy and Astrophysics. 585: A5. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692.
  5. Brewer, John M.; Fischer, Debra A.; Valenti, Jeff A.; Piskunov, Nikolai (2016). "Spectral Properties of Cool Stars: Extended Abundance Analysis of 1,617 Planet-search Stars". The Astrophysical Journal Supplement Series. 225 (2): 32. arXiv:1606.07929. Bibcode:2016ApJS..225...32B. doi:10.3847/0067-0049/225/2/32. S2CID 118507965.
  6. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  7. Challener, Ryan C.; Harrington, Joseph; Cubillos, Patricio E.; Blecic, Jasmina; Smalley, Barry (2021), "Spitzer Dayside Emission of WASP-34b", The Planetary Science Journal, 3 (4): 86, arXiv:2108.04101, Bibcode:2022PSJ.....3...86C, doi:10.3847/PSJ/ac1e9e
  8. May, E. M.; Stevenson, K. B.; Bean, Jacob L.; Bell, Taylor J.; Cowan, Nicolas B.; Dang, Lisa; Desert, Jean-Michel; Fortney, Jonathan J.; Keating, Dylan; Kempton, Eliza M.-R.; Komacek, Thaddeus D.; Lewis, Nikole K.; Mansfield, Megan; Morley, Caroline; Parmentier, Vivien; Rauscher, Emily; Swain, Mark R.; Zellem, Robert T.; Showman, Adam (2022), "A New Analysis of Eight Spitzer Phase Curves and Hot Jupiter Population Trends: Qatar-1b, Qatar-2b, WASP-52b, WASP-34b, and WASP-140b", The Astronomical Journal, 163 (6): 256, arXiv:2203.15059, Bibcode:2022AJ....163..256M, doi:10.3847/1538-3881/ac6261, S2CID 247778438
  9. "NameExoWorlds". 2019. Retrieved 6 September 2019.
  10. "Naming". 2019. Retrieved 6 September 2019.


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