HAT-P-23

Last updated
HAT-P-23 / Moriah
Observation data
Epoch J2000       Equinox J2000
Constellation Delphinus [1]
Right ascension 20h 24m 29.7235s [2]
Declination +16° 45′ 43.812″ [2]
Apparent magnitude  (V)11.94 [3]
Characteristics
Evolutionary stage main sequence [4]
Spectral type G0 [4]
Apparent magnitude  (J)11.103±0.022 [5]
Apparent magnitude  (H)10.846±0.022 [5]
Apparent magnitude  (K)10.791±0.020 [5]
Variable type Planetary transit [4]
Astrometry
Radial velocity (Rv)−16.67±0.88 [2] km/s
Proper motion (μ)RA: 13.325(11) mas/yr [2]
Dec.: −5.505(11) mas/yr [2]
Parallax (π)2.7358±0.0108  mas [2]
Distance 1,192 ± 5  ly
(366 ± 1  pc)
Details [4]
Mass 1.13±0.035  M☉
Radius 1.203±0.074  R☉
Luminosity 1.58±0.23  L☉
Surface gravity (log g)4.33±0.05  cgs
Temperature 5905±80  K
Metallicity 0.15±0.04
Rotation 7.015 d [6]
Rotational velocity (v sin i)8.1±0.5 km/s
Age 4.0±1.0  Gyr
Other designations
Moriah, TYC 1632-1396-1, GSC 01632-01396, 2MASS J20242972+1645437 [3]
Database references
SIMBAD data
Exoplanet Archive data

HAT-P-23 is a G-type main-sequence star 1192 light-years away. It has a rapid rotation (rotation period equal to 7 days) for its advanced age of 4 billion years, and exhibits a strong starspot activity. [7] The star may be in the process of being spun up by the giant planet on close orbit. [8] The star is enriched in heavy elements, having about 140% amount of metals compared to solar abundance.

Contents

Naming

In 2019, the HAT-P-23 star has received a proper name Moriah and planet HAT-P-23b - Jebus at an international NameExoWorlds contest. [9] These names mean the ancient name of the mount at the center of Jerusalem city, and ancient (pre-Roman) name of Jerusalem itself, respectively.

Planetary system

In 2010 a transiting hot Jupiter like planet was detected. [4] It has a measured dayside temperature of 2154±90 K. [10] The planet is believed to be on an unstable orbit, and expected to be engulfed by its parent star about 7.5+2.9
−1.8 million years from now, [4] although timing measurements of multiple transits since the discovery have been unable to detect any reduction in the orbital period. [6] [11] The planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 15±22°. [12] The color of planetary atmosphere is grey. [13] The atmosphere is mostly devoid of clouds, and shows tentatively a presence of titanium(II) oxide. [14]

Size comparison of HAT-P-23 b and Jupiter Exoplanet Comparison HAT-P-23 b.png
Size comparison of HAT-P-23 b and Jupiter
The HAT-P-23 planetary system [4] [15] [10] [13]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b (Jebus) 2.09±0.111  MJ 0.0232±0.00021.2128868±0.00000040.09685.1±1.5° 1.224±0.037  RJ

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 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.
  3. 1 2 HAT-P-23 -- Star
  4. 1 2 3 4 5 6 7 Bakos, G. Á.; Hartman, J.; Torres, G.; Latham, D. W.; Kovács, Géza; Noyes, R. W.; Fischer, D. A.; Johnson, J. A.; Marcy, G. W.; Howard, A. W.; Kipping, D.; Esquerdo, G. A.; Shporer, A.; Béky, B.; Buchhave, L. A.; Perumpilly, G.; Everett, M.; Sasselov, D. D.; Stefanik, R. P.; Lázár, J.; Papp, I.; Sári, P. (2010), "HAT-P-20b–HAT-P-23b: FOUR MASSIVE TRANSITING EXTRASOLAR PLANETS", The Astrophysical Journal, 742 (2): 116, arXiv: 1008.3388 , Bibcode:2011ApJ...742..116B, doi:10.1088/0004-637X/742/2/116, S2CID   119182075
  5. 1 2 3 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi: 10.1086/498708 . ISSN   0004-6256. S2CID   18913331. Vizier catalog entry
  6. 1 2 Salisbury, M.A.; et al. (2021). "Monitoring of transiting exoplanets and their host stars with small aperture telescopes". New Astronomy. 83. 101477. arXiv: 2008.08379 . Bibcode: 2021NewA...8301477S . doi: 10.1016/j.newast.2020.101477 .
  7. ↑ Schrijver, Carolus J. (2020), "Testing the solar activity paradigm in the context of exoplanet transits", The Astrophysical Journal, 890 (2): 121, arXiv: 2001.01093 , Bibcode:2020ApJ...890..121S, doi: 10.3847/1538-4357/ab67c1 , S2CID   209862471
  8. ↑ Maciejewski, G.; Fernández, M.; Aceituno, F.; Martín-Ruiz, S.; Ohlert, J.; Dimitrov, D.; Szyszka, K.; von Essen, C.; Mugrauer, M.; Bischoff, R.; Michel, K. -U.; Mallonn, M.; Stangret, M.; Moździerski, D. (2018), "Planet-star interactions with precise transit timing. I. The refined orbital decay rate for WASP-12 b and initial constraints for HAT-P-23 b, KELT-1 b, KELT-16 b, WASP-33 b, and WASP-103 b", Acta Astronomica, 68 (4): 371, arXiv: 1812.02438 , Bibcode:2018AcA....68..371M, doi:10.32023/0001-5237/68.4.4, S2CID   118895482
  9. ↑ IAU 100 NameExoWorlds Approved Names
  10. 1 2 O'Rourke, Joseph G.; Knutson, Heather A.; Zhao, Ming; Fortney, Jonathan J.; Burrows, Adam; Agol, Eric; Deming, Drake; Désert, Jean-Michel; Howard, Andrew W.; Lewis, Nikole K.; Showman, Adam P.; Todorov, Kamen O. (2014). "WARMSPITZERAND PALOMAR NEAR-IR SECONDARY ECLIPSE PHOTOMETRY OF TWO HOT JUPITERS: WASP-48b AND HAT-P-23b". The Astrophysical Journal. 781 (2): 109. arXiv: 1310.0011 . Bibcode:2014ApJ...781..109O. doi:10.1088/0004-637X/781/2/109. S2CID   13149979.
  11. ↑ Patra, Kishore C.; Winn, Joshua N.; Holman, Matthew J.; Gillon, Michael; Burdanov, Artem; Jehin, Emmanuel; Delrez, Laetitia; Pozuelos, Francisco J.; Barkaoui, Khalid; Benkhaldoun, Zouhair; Narita, Norio; Fukui, Akihiko; Kusakabe, Nobuhiko; Kawauchi, Kiyoe; Terada, Yuka; Bouma, L. G.; Weinberg, Nevin N.; Broome, Madelyn (2020), "The continuing search for evidence of tidal orbital decay of hot Jupiters", The Astronomical Journal, 159 (4): 150, arXiv: 2002.02606 , Bibcode:2020AJ....159..150P, doi: 10.3847/1538-3881/ab7374 , S2CID   211066260
  12. ↑ Moutou, Claire; Diaz, Rodrigo F.; Udry, Stephane; Hebrard, Guillaume; Bouchy, Francois; Santerne, Alexandre; Ehrenreich, David; Arnold, Luc; Boisse, Isabelle; Bonfils, Xavier; Delfosse, Xavier; Eggenberger, Anne; Forveille, Thierry; Lagrange, Anne-Marie; Lovis, Christophe; Martinez, Patrick; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Santos, Nuno C.; Segransan, Damien; Toublanc, Dominique; Troncin, Jean-Pierre; Vanhuysse, Michael; Vidal-Madjar, Alfred (2011), Spin-orbit inclinations of the exoplanetary systems HAT-P-8, HAT-P-9 HAT-P-16, and HAT-P-23, arXiv: 1105.3849 , Bibcode:2011A&A...533A.113M, doi:10.1051/0004-6361/201116760, S2CID   55894097
  13. 1 2 Ciceri, S.; Mancini, L.; Southworth, J.; Bruni, I.; Nikolov, N.; d'Ago, G.; Schröder, T.; Bozza, V.; Tregloan-Reed, J.; Henning, Th. (2015), "Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry", Astronomy & Astrophysics, 577: A54, arXiv: 1503.00762 , Bibcode:2015A&A...577A..54C, doi:10.1051/0004-6361/201425449, S2CID   53607610
  14. ↑ Weaver, Ian C.; López-Morales, Mercedes; Alam, Munazza K.; Espinoza, Néstor; Rackham, Benjamin V.; Goyal, Jayesh M.; MacDonald, Ryan J.; Lewis, Nikole K.; Apai, Dániel; Bixel, Alex; Jordán, Andrés; Kirk, James; McGruder, Chima; Osip, David J. (2021), "ACCESS: An Optical Transmission Spectrum of the High-gravity Hot Jupiter HAT-P-23b", The Astronomical Journal, 161 (6): 278, arXiv: 2104.04101 , Bibcode:2021AJ....161..278W, doi: 10.3847/1538-3881/abf652 , S2CID   233204299
  15. ↑ Ramón-Fox, Felipe G.; Sada, Pedro V. (2012), "PARAMETERS OF RECENT TRANSITS OF HAT-P-23b", Revista Mexicana de Astronomía y Astrofísica, 49: 71, arXiv: 1211.6481 , Bibcode:2013RMxAA..49...71R
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