HAT-P-23#Planetary system

{{Starbox begin

| name = HAT-P-23 / Moriah

}}

{{Starbox observe

| epoch = J2000

| constell = Delphinus

| ra = {{RA|20|24|29.7235}}

| dec = {{DEC|+16|45|43.812}}

| appmag_v = 11.94

}}

{{Starbox character

| type = main sequence

| class = G0

| appmag_1_passband = J

| appmag_1 = {{val|11.103|0.022}}

| appmag_2_passband = H

| appmag_2 = {{val|10.846|0.022}}

| appmag_3_passband = K

| appmag_3 = {{val|10.791|0.020}}

| variable = Planetary transit

}}

{{Starbox astrometry

| radial_v = {{val|-16.67|0.88}}

| prop_mo_ra = {{val|13.325|(11)}}

| prop_mo_dec = {{val|−5.505|(11)}}

| pm_footnote =

| parallax = 2.7358

| p_error = 0.0108

| parallax_footnote =

}}

{{Starbox detail

| source =

| mass = 1.13{{±|0.035}}

| radius = 1.203{{±|0.074}}

| gravity = 4.33{{±|0.05}}

| luminosity = 1.58{{±|0.23}}

| temperature = 5905{{±|80}}

| metal = 0.15{{±|0.04}}

| rotation = {{val|7.015|u=days}}

| rotational_velocity =8.1{{±|0.5}}

| age_gyr = 4.0{{±|1.0}}

}}

{{Starbox catalog

| names = {{odlist | name=Moriah |GSC=01632-01396|2MASS=J20242972+1645437|TYC=1632-1396-1}}

}}

{{Starbox reference

| Simbad = HAT-P-23

| NSTED = HAT-P-23

}}

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.{{citation|arxiv=2001.01093|title=Testing the solar activity paradigm in the context of exoplanet transits|year=2020|doi=10.3847/1538-4357/ab67c1|last1=Schrijver|first1=Carolus J.|journal=The Astrophysical Journal|volume=890|issue=2|page=121|bibcode=2020ApJ...890..121S|s2cid=209862471 |doi-access=free }} The star may be in the process of being spun up by the giant planet on close orbit.{{citation|arxiv=1812.02438|title=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|year=2018|last1=Maciejewski|first1=G.|last2=Fernández|first2=M.|last3=Aceituno|first3=F.|last4=Martín-Ruiz|first4=S.|last5=Ohlert|first5=J.|last6=Dimitrov|first6=D.|last7=Szyszka|first7=K.|last8=von Essen|first8=C.|last9=Mugrauer|first9=M.|last10=Bischoff|first10=R.|last11=Michel|first11=K. -U.|last12=Mallonn|first12=M.|last13=Stangret|first13=M.|last14=Moździerski|first14=D.|journal=Acta Astronomica|volume=68|issue=4|page=371|doi=10.32023/0001-5237/68.4.4|bibcode=2018AcA....68..371M|s2cid=118895482}} The star is enriched in heavy elements, having about 140% amount of metals compared to solar abundance.

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.[http://www.nameexoworlds.iau.org/final-results IAU 100 NameExoWorlds Approved Names] 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.{{citation|arxiv=1008.3388|title=HAT-P-20b–HAT-P-23b: FOUR MASSIVE TRANSITING EXTRASOLAR PLANETS|year=2010|doi=10.1088/0004-637X/742/2/116|last1=Bakos|first1=G. Á.|last2=Hartman|first2=J.|last3=Torres|first3=G.|last4=Latham|first4=D. W.|last5=Kovács|first5=Géza|last6=Noyes|first6=R. W.|last7=Fischer|first7=D. A.|last8=Johnson|first8=J. A.|last9=Marcy|first9=G. W.|last10=Howard|first10=A. W.|last11=Kipping|first11=D.|last12=Esquerdo|first12=G. A.|last13=Shporer|first13=A.|last14=Béky|first14=B.|last15=Buchhave|first15=L. A.|last16=Perumpilly|first16=G.|last17=Everett|first17=M.|last18=Sasselov|first18=D. D.|last19=Stefanik|first19=R. P.|last20=Lázár|first20=J.|last21=Papp|first21=I.|last22=Sári|first22=P.|journal=The Astrophysical Journal|volume=742|issue=2|page=116|bibcode=2011ApJ...742..116B |s2cid=119182075}} It has a measured dayside temperature of 2154{{±|90}} K.{{Cite journal|doi = 10.1088/0004-637X/781/2/109|title = WARMSPITZERAND PALOMAR NEAR-IR SECONDARY ECLIPSE PHOTOMETRY OF TWO HOT JUPITERS: WASP-48b AND HAT-P-23b|year = 2014|last1 = O'Rourke|first1 = Joseph G.|last2 = Knutson|first2 = Heather A.|last3 = Zhao|first3 = Ming|last4 = Fortney|first4 = Jonathan J.|last5 = Burrows|first5 = Adam|last6 = Agol|first6 = Eric|last7 = Deming|first7 = Drake|last8 = Désert|first8 = Jean-Michel|last9 = Howard|first9 = Andrew W.|last10 = Lewis|first10 = Nikole K.|last11 = Showman|first11 = Adam P.|last12 = Todorov|first12 = Kamen O.|journal = The Astrophysical Journal|volume = 781|issue = 2|page = 109|arxiv = 1310.0011|bibcode = 2014ApJ...781..109O|s2cid = 13149979}} 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, although timing measurements of multiple transits since the discovery have been unable to detect any reduction in the orbital period.{{citation|arxiv=2002.02606|title=The continuing search for evidence of tidal orbital decay of hot Jupiters|year=2020|doi=10.3847/1538-3881/ab7374|last1=Patra|first1=Kishore C.|last2=Winn|first2=Joshua N.|last3=Holman|first3=Matthew J.|last4=Gillon|first4=Michael|last5=Burdanov|first5=Artem|last6=Jehin|first6=Emmanuel|last7=Delrez|first7=Laetitia|last8=Pozuelos|first8=Francisco J.|last9=Barkaoui|first9=Khalid|last10=Benkhaldoun|first10=Zouhair|last11=Narita|first11=Norio|last12=Fukui|first12=Akihiko|last13=Kusakabe|first13=Nobuhiko|last14=Kawauchi|first14=Kiyoe|last15=Terada|first15=Yuka|last16=Bouma|first16=L. G.|last17=Weinberg|first17=Nevin N.|last18=Broome|first18=Madelyn|journal=The Astronomical Journal|volume=159|issue=4|page=150|bibcode=2020AJ....159..150P|s2cid=211066260 |doi-access=free }} The planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 15{{±|22}}°.{{citation|arxiv=1105.3849|title=Spin-orbit inclinations of the exoplanetary systems HAT-P-8, HAT-P-9 HAT-P-16, and HAT-P-23|year=2011|doi=10.1051/0004-6361/201116760|last1=Moutou|first1=Claire|last2=Diaz|first2=Rodrigo F.|last3=Udry|first3=Stephane|last4=Hebrard|first4=Guillaume|last5=Bouchy|first5=Francois|last6=Santerne|first6=Alexandre|last7=Ehrenreich|first7=David|last8=Arnold|first8=Luc|last9=Boisse|first9=Isabelle|last10=Bonfils|first10=Xavier|last11=Delfosse|first11=Xavier|last12=Eggenberger|first12=Anne|last13=Forveille|first13=Thierry|last14=Lagrange|first14=Anne-Marie|last15=Lovis|first15=Christophe|last16=Martinez|first16=Patrick|last17=Pepe|first17=Francesco|last18=Perrier|first18=Christian|last19=Queloz|first19=Didier|last20=Santos|first20=Nuno C.|last21=Segransan|first21=Damien|last22=Toublanc|first22=Dominique|last23=Troncin|first23=Jean-Pierre|last24=Vanhuysse|first24=Michael|last25=Vidal-Madjar|first25=Alfred|bibcode=2011A&A...533A.113M |s2cid=55894097}} The color of planetary atmosphere is grey. The atmosphere is mostly devoid of clouds, and shows tentatively a presence of Titanium(II) oxide.{{citation|arxiv=2104.04101|year=2021|title=ACCESS: An Optical Transmission Spectrum of the High-gravity Hot Jupiter HAT-P-23b|doi=10.3847/1538-3881/abf652|last1=Weaver|first1=Ian C.|last2=López-Morales|first2=Mercedes|last3=Alam|first3=Munazza K.|last4=Espinoza|first4=Néstor|last5=Rackham|first5=Benjamin V.|last6=Goyal|first6=Jayesh M.|last7=MacDonald|first7=Ryan J.|last8=Lewis|first8=Nikole K.|last9=Apai|first9=Dániel|last10=Bixel|first10=Alex|last11=Jordán|first11=Andrés|last12=Kirk|first12=James|last13=McGruder|first13=Chima|last14=Osip|first14=David J.|journal=The Astronomical Journal|volume=161|issue=6|page=278|bibcode=2021AJ....161..278W|s2cid=233204299 |doi-access=free }}

File:Exoplanet Comparison HAT-P-23 b.png

{{OrbitboxPlanet begin

| table_ref = {{citation|arxiv=1211.6481|title=PARAMETERS OF RECENT TRANSITS OF HAT-P-23b|year=2012|last1=Ramón-Fox|first1=Felipe G.|last2=Sada|first2=Pedro V.|journal=Revista Mexicana de Astronomía y Astrofísica|volume=49|page=71|bibcode=2013RMxAA..49...71R}}{{citation|arxiv=1503.00762|title=Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry|year=2015|doi=10.1051/0004-6361/201425449|last1=Ciceri|first1=S.|last2=Mancini|first2=L.|last3=Southworth|first3=J.|last4=Bruni|first4=I.|last5=Nikolov|first5=N.|last6=d'Ago|first6=G.|last7=Schröder|first7=T.|last8=Bozza|first8=V.|last9=Tregloan-Reed|first9=J.|last10=Henning|first10=Th.|journal=Astronomy & Astrophysics|volume=577|pages=A54|bibcode=2015A&A...577A..54C|s2cid=53607610}}

}}

{{OrbitboxPlanet

| exoplanet = b (Jebus)

| mass = 2.09{{±|0.111}}

| radius = 1.224{{±|0.037}}

| semimajor = 0.0232{{±|0.0002}}

| period = 1.2128868{{±|0.0000004}}

| eccentricity = 0.096

| inclination = 85.1{{±|1.5}}

}}

References

{{Reflist|refs=

{{cite journal | title=Monitoring of transiting exoplanets and their host stars with small aperture telescopes | last1=Salisbury | first1=M.A. | last2=Kolb | first2=U.C. | last3=Norton | first3=A.J. | last4=Haswell | first4=C.A. | display-authors=1 | journal=New Astronomy | volume=83 | at=101477 | year=2021 | arxiv=2008.08379 | bibcode=2021NewA...8301477S | bibcode-access=free | doi=10.1016/j.newast.2020.101477 | doi-access=free }}

[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HAT-P-23 HAT-P-23 -- Star]

{{cite journal |doi=10.1086/498708 |last1=Skrutskie |first1=Michael F. |last2=Cutri |first2=Roc M. |last3=Stiening |first3=Rae |last4=Weinberg |first4=Martin D. |last5=Schneider |first5=Stephen E. |last6=Carpenter |first6=John M. |last7=Beichman |first7=Charles A. |last8=Capps |first8=Richard W. |last9=Chester |first9=Thomas |last10=Elias |first10=Jonathan H. |last11=Huchra |first11=John P. |last12=Liebert |first12=James W. |last13=Lonsdale |first13=Carol J. |last14=Monet |first14=David G. |last15=Price |first15=Stephan |last16=Seitzer |first16=Patrick |last17=Jarrett |first17=Thomas H. |last18=Kirkpatrick |first18=J. Davy |last19=Gizis |first19=John E. |last20=Howard |first20=Elizabeth V. |last21=Evans |first21=Tracey E. |last22=Fowler |first22=John W. |last23=Fullmer |first23=Linda |last24=Hurt |first24=Robert L. |last25=Light |first25=Robert M. |last26=Kopan |first26=Eugene L. |last27=Marsh |first27=Kenneth A. |last28=McCallon |first28=Howard L. |last29=Tam |first29=Robert |last30=Van Dyk |first30=Schuyler D. |last31=Wheelock |first31=Sherry L. |title=The Two Micron All Sky Survey (2MASS) |journal=The Astronomical Journal |date=1 February 2006 |volume=131 |issue=2 |pages=1163–1183 |bibcode=2006AJ....131.1163S |s2cid=18913331 |issn=0004-6256 |doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ5f3a87d07d2c&-out.add=.&-source=II/246/out&2MASS===20242972%2b1645437 Vizier catalog entry ]

}}

Category:Delphinus

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Planetary transit variables

J20242972+1645437

Moriah