WASP-43b

WASP-43b / Astrolábos
Temperature map of WASP-43b
Discovery[1]
Discovered byCoel Hellier et al.
Discovery siteLa Silla Observatory / South African Astronomical Observatory
Discovery datePublished April 15, 2011
transit method (secondary occultation detected later)
Designations
Astrolábos[2]
Orbital characteristics
0.01526 (± 0.00018)[3] AU
Eccentricity< 0.0298 [3]
0.81347753 (± 0.00000071)[3] d
Inclination82.33 (± 0.20) [3]
StarWASP-43
Physical characteristics
1.04 +0.07
−0.09[4] RJ
Mass2.03 (± 0.1)[4] MJ
Albedo<0.06[5]
Temperature1666±48 K

WASP-43b, formally named Astrolábos,[2] is a transiting planet in orbit around the young, active, and low-mass star WASP-43 in the constellation Sextans. The planet is a hot Jupiter with a mass twice that of Jupiter, but with a roughly equal radius. WASP-43b was flagged as a candidate by the SuperWASP program, before they conducted follow-ups using instruments at La Silla Observatory in Chile, which confirmed its existence and provided orbital and physical characteristics. The planet's discovery was published on April 14, 2011.[1]

WASP-43b has an orbital period of approximately 0.8 days (19.2 hours), which at the time of discovery was the second-shortest known, surpassed only by WASP-19b.[1] At the time of its discovery, the size of WASP-43b's orbit was the smallest known for a hot Jupiter,[1] probably due to its host star's low mass.

Nomenclature

In August 2022, this planet and its host star were included among 20 systems to be named by the third NameExoWorlds project.[6] The approved names, proposed by a team from Romania, were announced in June 2023. WASP-43b is named Astrolábos and its host star is named Gnomon, after the gnomon and the Greek word for the astrolabe.[2]

Observational history

WASP-43 was first flagged as host to a potential transiting event (when a body crosses in front of and dims its host star) by data collected by SuperWASP, a British organization working to discover transiting planets across the entirety of the sky. In particular, WASP-43 was observed first by the leg of WASP-South at the South African Astronomical Observatory between January and May 2009.[1]

Later observation by both SuperWASPs in the Northern and Southern Hemispheres led to the collection of 13,768 data points between January and May 2010 and to the use of the CORALIE spectrograph at La Silla Observatory in Chile. Fourteen measurements using the radial velocity method confirmed WASP-43b as a planet, revealing its mass in the process. The use of La Silla's TRAPPIST telescope helped the science team working on the planet to create a light curve of the planet's transit in December 2010.[1]

The initial discovery was published in the journal Astronomy and Astrophysics in 2011.[1] This was followed by reporting of a second transit in 2014,[7] and a full observation of the phases of the planet later that year.[8]

Host star

Main article: WASP-43

WASP-43 is a K-type star in the Sextans constellation that is about 80 parsecs (261 light years) away.[1] The star has a mass 0.58 times that of the Sun, but is more diffuse, with a radius 0.93 times that of the Sun. The star's effective temperature is 4,400 K, making the star cooler than the Sun, and is metal-poor with regards to the Sun because it has a metallicity of [Fe/H] = −0.05 (89% the amount of iron in the Sun).[4] The star is young, and is estimated to be 598 million years old (as compared to the Sun's 4.6 billion years).[4] Analysis of emission lines indicate that WASP-43 is an active star.[1]

WASP-43 has one detected planet in its orbit, WASP-43b. The star has an apparent magnitude of 12.4, and thus is too faint to be seen with the unaided eye from Earth.[4]

Characteristics

Artist's concept of WASP-43b

WASP-43b is a dense hot Jupiter with a mass 2.05 times the mass of Jupiter, but a radius 1.036 times that of Jupiter's. The planet orbits its host star at a mean distance of 0.01526 AU every 0.813478 days (19.5235 hours);[4] this orbital period, at the time of WASP-43b's discovery, was the second-shortest orbit yet detected, surpassed only by WASP-19b. In comparison, Mercury has an orbital period of 87.97 days and lies at a mean distance of 0.387 AU from the Sun.[9] In addition, WASP-43b had the closest orbit to its host star (among hot Jupiters) at the time of its discovery, comparable only to the super-Earth planet GJ 1214 b and to the planetary candidate orbiting KOI-961 (confirmed a year later as Kepler-42). While hot Jupiters are known to have small orbital periods, planets with exceptionally small periods below three or four days are extremely rare; however, in the case of WASP-43b, the planet's proximity can be explained because its host star has a very low mass. The rarity of systems like that of WASP-43 and its planet suggest that hot Jupiters do not usually occur around low-mass stars, or that such planets cannot maintain stable orbits around such stars.[1]

WASP-43b, along with the planets WASP-19b and WASP-18b, conflicted with currently accepted models of tidal movements derived from observations of the orbits of binary star systems. Revisions to the model with regard to planets were proposed to help the models conform to the orbital parameters of these planets.[1] No orbital decay driven by tidal dissipation was detected in 2016, placing a lower limit of 10 million years on the remaining planetary lifetime.[10] Updated orbital period measurements have failed to detect orbital decay as of 2021.[11][12]

Atmosphere

In 2019, the spectrum of WASP-43b was taken, with the best fit being water-containing clouds without significant amounts of alkali metals.[13] In 2020, further analysis of the spectra revealed the presence of bivalent aluminum oxide (AlO) and water in the atmosphere,[14] while carbon monoxide, carbon dioxide and methane were not detected. Climate modelling suggests the carbon monoxide concentration may be variable, while the atmospheric spectrum of WASP-43b is dominated by clouds made of refractory mineral particles, with a small contribution from hydrocarbon haze.[15] Carbon to oxygen ratio in the planet (0.75±0.15) is elevated compared to the Solar ratio of 0.55.[16] The planet is very dark overall, with no clouds on the dayside[17] and an albedo below 0.06.[5] In 2024, the James Webb Telescope observed that the skies are clear on the day side and is cloudy on its night side, with winds of 5,000 miles per hour.[18]

There is a large difference in temperature between dayside (1479±13 K) and nightside (755±46 K).[17]

  • "WASP-43b". SIMBAD. Centre de données astronomiques de Strasbourg.
  • WASP Planets
  • "Hubble Hangout on planet WASP-43b". YouTube. 2014. Retrieved 7 Nov 2014.

References

  1. ^ a b c d e f g h i j k Hellier, C.; Anderson, D.R. (2011). "WASP-43b: The closest-orbiting hot Jupiter". Astronomy and Astrophysics. 535: L7. arXiv:1104.2823. Bibcode:2011A&A...535L...7H. doi:10.1051/0004-6361/201117081. S2CID 70287736.
  2. ^ a b c "2022 Approved Names". nameexoworlds.iau.org. IAU. Retrieved 7 June 2023.
  3. ^ a b c d Gillon, M.; Triaud, A.H.M.J. (2012). "The TRAPPIST survey of southern transiting planets. I. Thirty eclipses of the ultra-short period planet WASP-43 b". Astronomy and Astrophysics. 542 (A4): A4. arXiv:1201.2789. Bibcode:2012A&A...542A...4G. doi:10.1051/0004-6361/201218817. S2CID 50880195.
  4. ^ a b c d e f Jean Schneider (2011). "Notes for star WASP-43". Extrasolar Planets Encyclopaedia. Archived from the original on May 5, 2011. Retrieved 7 May 2011.
  5. ^ a b Fraine, Jonathan; Mayorga, Laura C.; Stevenson, Kevin B.; Lewis, Nikole; Kataria, Tiffany; Bean, Jacob; Bruno, Giovanni; Fortney, Jonathan J.; Kreidberg, Laura; Morley, Caroline V.; Mouawad, Nelly; Todorov, Kamen O.; Parmentier, Vivien; Wakeford, Hannah R.; Katherina Feng, Y.; Kilpatrick, Brian M.; Line, Michael R. (2021), "The Dark World: A Tale of WASP-43b in Reflected Light with HST WFC3/UVIS", The Astronomical Journal, 161 (6): 269, arXiv:2103.16676, Bibcode:2021AJ....161..269F, doi:10.3847/1538-3881/abe8d6, S2CID 232428234
  6. ^ "List of ExoWorlds 2022". nameexoworlds.iau.org. IAU. 8 August 2022. Retrieved 27 August 2022.
  7. ^ Chen, G; Van Boekel, R; Wang, H; Nikolov, N; Fortney, J. J; Seemann, U; Wang, W; Mancini, L; Henning, Th (2014). "Broad-band transmission spectrum and K-band thermal emission of WASP-43b as observed from the ground". Astronomy and Astrophysics. 563: A40. arXiv:1401.3007. Bibcode:2014A&A...563A..40C. doi:10.1051/0004-6361/201322740. S2CID 21723907.
  8. ^ "Hubble Maps the Temperature and Water Vapor on an Extreme Exoplanet". 2015-04-22.
  9. ^ David Williams (17 November 2010). "Mercury Fact Sheet". Goddard Space Flight Center. NASA. Archived from the original on 6 November 2015. Retrieved 7 May 2011.
  10. ^ Hoyer, Sergio; Pallé, Enric; Dragomir, Diana; Murgas, Felipe (2016). "Ruling Out the Orbital Decay of the Wasp-43B Exoplanet". The Astronomical Journal. 151 (6): 137. arXiv:1603.01144. Bibcode:2016AJ....151..137H. doi:10.3847/0004-6256/151/6/137. S2CID 119201679.
  11. ^ Garai, Z.; Pribulla, T.; Parviainen, H.; Pallé, E.; Claret, A.; Szigeti, L.; Béjar, V J S.; Casasayas-Barris, N.; Crouzet, N.; Fukui, A.; Chen, G.; Kawauchi, K.; Klagyivik, P.; Kurita, S.; Kusakabe, N.; De Leon, J. P.; Livingston, J. H.; Luque, R.; Mori, M.; Murgas, F.; Narita, N.; Nishiumi, T.; Oshagh, M.; Szabó, Gy M.; Tamura, M.; Terada, Y.; Watanabe, N. (2021), "Is the orbit of the exoplanet WASP-43b really decaying? TESS and MuSCAT2 observations confirm no detection", Monthly Notices of the Royal Astronomical Society, 508 (4): 5514–5523, arXiv:2110.04761, doi:10.1093/mnras/stab2929
  12. ^ Davoudi, Fatemeh; Baştürk, Özgür; Yalçınkaya, Selçuk; Esmer, Ekrem M.; Safari, Hossein (2021), "Investigation of Orbital Decay and Global Modeling of the Planet WASP-43 B", The Astronomical Journal, 162 (5): 210, arXiv:2111.03346, Bibcode:2021AJ....162..210D, doi:10.3847/1538-3881/ac1baf, S2CID 239464886
  13. ^ Chen, Guo; Roy van Boekel; Wang, Hongchi; Nikolov, Nikolay; Fortney, Jonathan J.; Seemann, Ulf; Wang, Wei; Mancini, Luigi; Henning, Thomas; Alam, Munazza K.; Kirk, James; McGruder, Chima; Rodler, Florian; Fienco, Jennifer (2019). "ACCESS: A Visual to Near-infrared Spectrum of the Hot Jupiter WASP-43b with Evidence of H2O, but no evidence of Na or K". The Astronomical Journal. 159: 13. arXiv:1911.03358. doi:10.3847/1538-3881/ab55da. S2CID 207847873.
  14. ^ Chubb, Katy L.; Min, Michiel; Kawashima, Yui; Helling, Christiane; Waldmann, Ingo (2020). "Aluminium oxide in the atmosphere of hot Jupiter WASP-43b". Astronomy & Astrophysics. 639: A3. arXiv:2004.13679. Bibcode:2020A&A...639A...3C. doi:10.1051/0004-6361/201937267. S2CID 216562466.
  15. ^ Helling, Ch.; Kawashima, Y.; Graham, V.; Samra, D.; Chubb, K. L.; Min, M.; Waters, L. B. F. M.; Parmentier, V. (2020). "Mineral cloud and hydrocarbon haze particles in the atmosphere of the hot Jupiter JWST target WASP-43b". Astronomy & Astrophysics. 641: A178. arXiv:2005.14595. Bibcode:2020A&A...641A.178H. doi:10.1051/0004-6361/202037633. S2CID 219124472.
  16. ^ Chubb, Katy L.; Min, Michiel (2022), "Exoplanet Atmosphere Retrievals in 3D Using Phase Curve Data with ARCiS: Application to WASP-43b", Astronomy & Astrophysics, 665: A2, arXiv:2206.09738, Bibcode:2022A&A...665A...2C, doi:10.1051/0004-6361/202142800, S2CID 249560548
  17. ^ a b Murphy, Matthew M.; Beatty, Thomas G.; Roman, Michael T.; Malsky, Isaac; Wingate, Alex; Ochs, Grace; Cinque, L.; Beltz, Hayley; Rauscher, Emily; Kempton, Emiza M. -R.; Stevenson, Kevin B. (2023), "A Lack of Variability between Repeated Spitzer Phase Curves of WASP-43b", The Astronomical Journal, 165 (3): 107, arXiv:2212.03240, Bibcode:2023AJ....165..107M, doi:10.3847/1538-3881/acaec5, S2CID 254275218
  18. ^ "NASA's Webb Maps Weather on Planet 280 Light-Years Away - NASA Science". science.nasa.gov. Retrieved 2024-04-30.

Read other articles:

Sufian Anuar

Sufian Anuar Informasi pribadiNama lengkap Muhammad Sufian bin AnuarTanggal lahir 26 Agustus 1987 (umur 36)Tempat lahir SingapuraTinggi 1,70 m (5 ft 7 in)Posisi bermain PenyerangInformasi klubKlub saat ini LionsXIINomor 15Karier senior*Tahun Tim Tampil (Gol)2006 Home United 2007–2008 Young Lions 2009–2011 Home United 2012 LionsXII 17 (5)2013 Warriors 2014 LionsXII 9 (3)Tim nasional‡2010– Singapura 4 (0) * Penampilan dan gol di klub senior hanya dihitung dari liga ...

 

 

EM Strasbourg Business School

EM Strasbourg Business SchoolHistoireFondation 2007 issue de la fusion entre l'IECS créé en 1919 et de l'IAE de StrasbourgStatutType Ecole de commerceFondateur Chambre de commerce et d'industrie de Strasbourg et du Bas-RhinPrésident Patrick HetzelDirecteur Babak MehmanpazirDevise Be distinctiveMembre de Université de Strasbourg, CGE[2], Réseau des IAE[3], AACSB, AMBA, EPAS, EQUIS[4]Site web www.em-strasbourg.comChiffres-clésÉtudiants 3 300Enseignants-chercheurs 90 enseignants-chercheur...

 

 

Straits dollar

Currency of the Straits Settlements This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (December 2012) (Learn how and when to remove this message) One Straits one dollar banknote from 1935 One Straits one cent coin from 1920 The Straits dollar was the currency of the Straits Settlements from 1898 until 1939.[1] At the same time, it was also used in the Fe...

Post-Soviet states

Countries that were formerly part of the Soviet Union Post-Soviet states 1.  Armenia • 2.  Azerbaijan • 3.  Belarus • 4.  Estonia • 5.  Georgia • 6.  Kazakhstan • 7.  Kyrgyzstan • 8.  Latvia • 9.  Lithuania • 10.  Moldova • 11.  Russia • 12.  Tajikistan • 13.  Turkmenistan • 14.  Ukraine • 15.  Uzbekistan The post-Soviet states, also referred to as the former Soviet Union (FSU)[1] or...

 

 

Harry Clarke

Irish artist (1889–1931) For other people named Harry Clarke, see Harry Clarke (disambiguation). Harry ClarkeBornHenry Patrick Clarke17 March 1889Dublin, County Dublin, Ireland, U.K.Died6 January 1931(1931-01-06) (aged 41)Chur, Grisons, SwitzerlandResting placeChur (disinterred in 1946 and reburied in an unknown communal grave)Alma materDublin Metropolitan School of ArtKnown forstained glass and book illustrationMovementArts and CraftsSpouseMargaret Clarke Henry Patrick Clark...

 

 

Повітряні сили Збройних сил України

Ця стаття потребує додаткових посилань на джерела для поліпшення її перевірності. Будь ласка, допоможіть удосконалити цю статтю, додавши посилання на надійні (авторитетні) джерела. Зверніться на сторінку обговорення за поясненнями та допоможіть виправити недоліки. Мат...

Cuvette

Small container used in laboratories This article is about a tool used in laboratories. For the region of the Republic of the Congo, see Cuvette Region. This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article may require cleanup to meet Wikipedia's quality standards. The specific problem is: some references cited are vendor catalogs. Please help improve this article if you can. (Nove...

 

 

Finale Europacup I 1980

De finale van de Europacup I van het seizoen 1979/80 werd gehouden op 30 mei 1980 in het Estadio Santiago Bernabéu in Madrid. Titelverdediger Nottingham Forest stond tegenover het West-Duitse Hamburger SV. Net als een jaar eerder won Nottingham Forest met 1-0. Bij HSV speelde de Engelsman Kevin Keegan die in 1977 de Europacup won met Liverpool FC. Nottingham Forest werd de eerste club die vaker de Europacup I dan het nationaal kampioenschap won. Wedstrijd 28 mei 198020:30 Nottingham Forest 1...

 

 

Transgender

Gender identity other than sex assigned at birth Not to be confused with Transsexual. TransgenderTransgender flagClassificationGender identityAbbreviationsTGOther termsAssociated termsTranssexual Part of a series onTransgender topics      OutlineHistoryTimeline Gender identities Androgyne Bissu, Calabai, Calalai Burrnesha Cisgender Gender bender Hijra Non-binary or genderqueer Gender fluidity Kathoey Koekchuch Third gender Bakla Faʻafafine Femminiello Khanith Māhū ...

Palazzo Clerici

Disambiguazione – Se stai cercando l'omonimo palazzo di Cuggiono in Lombardia, vedi Palazzo Clerici (Castelletto di Cuggiono). Palazzo ClericiLa facciata di palazzo ClericiLocalizzazioneStato Italia LocalitàMilano IndirizzoVia Clerici, 5 Coordinate45°28′01.1″N 9°11′13.84″E45°28′01.1″N, 9°11′13.84″E Informazioni generaliCondizioniIn uso CostruzioneXVIII secolo StileBarocco RealizzazioneAppaltatoreAnton Giorgio Clerici Modifica dati su Wikidata · Manuale Palaz...

 

 

مجلس نواب داكوتا الجنوبية

مجلس نواب داكوتا الجنوبية البلد الولايات المتحدة  جزء من هيئة داكوتا الجنوبية التشريعية  الأعضاء 70   الموقع الإلكتروني الموقع الرسمي  تعديل مصدري - تعديل   مجلس نواب داكوتا الجنوبية (بالإنجليزية: South Dakota House of Representatives)‏ هو مجلس النواب التشريعي لولاية داكوتا ال�...

 

 

حيوانات مذيلة

اضغط هنا للاطلاع على كيفية قراءة التصنيف حيوانات مذيلة   المرتبة التصنيفية شعبة[1]  التصنيف العلمي  فوق النطاق  حيويات مملكة عليا  حقيقيات النوى مملكة  أسناخ صبغية عويلم  سجسيات مملكة فرعية  طلائعيات جذرية الاسم العلمي Cercozoa[1]  تعديل مصدري - تع...

台灣民眾黨立法院黨團

台灣民眾黨立法院黨團青島三館一樓出入口總召集人黃國昌副總召集人黃珊珊幹事長吳春城成立2020年2月1日 (2020-02-01)授權法源立法院組織法第33條黨團辦公室臺北市中正區中山南路1-3號3樓（立法院青島第三會館3樓）黨團立委席次8 / 113 台灣民眾黨立法院黨團是台灣民眾黨在中華民國立法院依據《立法院組織法》第33條所成立的議會黨團，成立於2020年[1]。 當前黨團�...

 

 

Potassium hexafluoroarsenate

Potassium hexafluoroarsenate Names IUPAC name potassium hexafluoro-λ⁵-arsanuide Identifiers CAS Number 17029-22-0 3D model (JSmol) Interactive image ChEBI CHEBI:82182 ChemSpider 140511 ECHA InfoCard 100.037.351 EC Number 241-102-7 KEGG C19055 PubChem CID 159810 UNII T7TYZ7585F CompTox Dashboard (EPA) DTXSID1066150 InChI InChI=1S/AsF6.K/c2-1(3,4,5,6)7;/q-1;+1Key: DITNVAZRXJOPSJ-UHFFFAOYSA-N SMILES F[As-](F)(F)(F)(F)F.[K+] Properties Chemical formula AsF6K Molar mass 228.0103 g·m...

 

 

4728th Air Defense Group

4728th Air Defense Group 46th Fighter-Interceptor Squadron F-94C at Dover AFBActive1957–1958Country United StatesBranch United States Air ForceTypeFighter InterceptorRoleAir DefensePart ofAir Defense CommandMilitary unit The 4728th Air Defense Group is a discontinued United States Air Force organization. Its last assignment was with the New York Air Defense Sector at Dover Air Force Base. The group was formed to provide a single command and support organization for the two f...

History of the violin

Part of a series onViolin Violinists Fiddle Fiddlers History Musical styles Technique Acoustics Construction Making andmaintenance Luthiers Family vte The violin, viola and cello were first built in the early 16th century, in Italy. The earliest evidence for their existence is in paintings by Gaudenzio Ferrari from the 1530s, though Ferrari's instruments had only three strings. The Académie musicale, a treatise written in 1556 by Philibert Jambe de Fer, gives a clear description of the viol...

 

 

South Wingfield

Human settlement in EnglandSouth WingfieldSouth Wingfield church during the 2007 floodsSouth WingfieldLocation within DerbyshirePopulation1,514 (2011)OS grid referenceSK375555Civil parishSouth WingfieldDistrictAmber ValleyShire countyDerbyshireRegionEast MidlandsCountryEnglandSovereign stateUnited KingdomPost townALFRETONPostcode districtDE55PoliceDerbyshireFireDerbyshireAmbulanceEast Midlands List of places UK England Derbyshire 53°05′44″N 1°26′24″W&#...

 

 

海の見える理髪店

海の見える理髪店著者 荻原浩発行日 2016年3月25日発行元 集英社ジャンル 連作短編集国 日本言語 日本語形態 四六判ページ数 240公式サイト www.bungei.shueisha.co.jpコード ISBN 978-4-08-771653-5 ISBN 978-4-08-745872-5（文庫判） ウィキポータル 文学 [ ウィキデータ項目を編集 ]テンプレートを表示 『海の見える理髪店』（うみのみえるりはつてん）は、荻原浩による連作短編集&#...

وادي فوكين

وادي فوكين   الإحداثيات 31°42′24″N 35°06′14″E / 31.706666666667°N 35.103888888889°E / 31.706666666667; 35.103888888889   تقسيم إداري  البلد دولة فلسطين[1]  التقسيم الأعلى محافظة بيت لحم  خصائص جغرافية ارتفاع 650 متر  رمز جيونيمز 281356  تعديل مصدري - تعديل   منظر عام لقرية وادي ف...

 

 

Forces armées grecques

Forces armées grecquesEλληνικές Ένοπλες Δυνάμεις Fondation 13 avril 1822 Branches Armée hellénique Marine hellénique Force aérienne grecque Quartier-général Athènes, Grèce Commandement Commandant suprême de l'armée Ekateríni Sakellaropoúlou Ministre de la Défense nationale Alkiviádis Stefanís Chef d'état-major de la Défense nationale Konstantinos Floros Main-d'œuvre Âges militaires 18 - 49 Disponibles au service militaire 2 485 389 (16-49 ...