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WASP-31b

March 17, 2024

WASP-31b is a low-density (puffy) "hot Jupiter" extrasolar planet orbiting the metal-poor (63% of solar metallicity) dwarf star WASP-31.[1] The exoplanet was discovered in 2010 by the WASP project.[2][1] WASP-31b is in the constellation of Crater,[3] and is about 1305 light-years[4] (light travel distance) from Earth.[2]

WASP-31b
"Hot Jupiter" exoplanet WASP-31b (artist concept)
Discovery
Discovered byAnderson, D.R. et al.[1]
Discovery siteWASP[2]
Discovery date2010[2]
Primary transit[2]
Orbital characteristics
0.04657±0.00034 AU
Eccentricity0[2]
3.40591[2] d
Inclination84.54±0.027[2]
StarWASP-31[2]
Physical characteristics
Mean radius
1.537±0.06[2] RJ
Mass0.478±0.03[2] MJ

Characteristics edit

WASP-31b is a low-density (puffy) "hot Jupiter" exoplanet with a mass about 0.48 times that of Jupiter and a radius about 1.55 times that of Jupiter.[2][1] The planetary atmosphere has indeed the largest scale height, equal to 1150km, among exoplanets with measurable atmospheres as at 2021.[5]

The exoplanet orbits WASP-31, its host star, every 3.4 days.[2]

 
Comparison of "hot Jupiter" exoplanets, including WASP-31b
(top row; 3rd from left) (artist concept)

From top left to lower right: WASP-12b, WASP-6b, WASP-31b, WASP-39b, HD 189733b, HAT-P-12b, WASP-17b, WASP-19b, HAT-P-1b and HD 209458b.

In 2012, it was found from the Rossiter–McLaughlin effect that WASP-31b is orbiting the parent star in a prograde direction, with the WASP-31 star rotational axis inclined to the planetary orbit by 2.8±3.1 degrees.[6] The spectroscopic study in 2014 revealed that WASP-31b has a dense cloud deck overlaid by a hazy atmosphere.[7] WASP-31b was also reported to have significant amounts of potassium in its upper atmosphere, but the detection of potassium was refuted in 2015.[8] The potassium detection discrepancy was resolved in 2020 with the improved cloud deck model,[9] with the best fit being a very small amount of water over clouds and no potassium at all.[10]

Reanalysis of planetary spectroscopic data in 2020 has revealed the presence of chromium monohydride besides water.[11]

See also edit

References edit

  1. ^ a b c d Anderson, D.R.; et al. (2011). "WASP-31b: a low-density planet transiting a metal-poor, late-F-type dwarf star" (PDF). Astronomy & Astrophysics. 531: A60. arXiv:1011.5882. Bibcode:2011A&A...531A..60A. doi:10.1051/0004-6361/201016208. S2CID 20154835.
  2. ^ a b c d e f g h i j k l m Staff (2018). "Planet WASP-31 b". Extrasolar Planets Encyclopaedia. Retrieved 2 March 2018.
  3. ^ DJM (2018). "Finding the constellation which contains given sky coordinates". djm.cc. Retrieved 2 March 2018.
  4. ^ Kyle (2018). "Convert Parsecs to Light Years". KylesConverter.com. Retrieved 2 March 2018.
  5. ^ Baxter, Claire; Désert, Jean-Michel; Tsai, Shang-Min; Todorov, Kamen O.; Bean, Jacob L.; Deming, Drake; Parmentier, Vivien; Fortney, Jonathan J.; Line, Michael; Thorngren, Daniel; Pierrehumbert, Raymond T.; Burrows, Adam; Showman, Adam P. (2021), "Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres", Astronomy & Astrophysics, 648: A127, arXiv:2103.07185, doi:10.1051/0004-6361/202039708, S2CID 232222174
  6. ^ Brown, D. J. A.; Cameron, A. Collier; Anderson, D. R.; Enoch, B.; Hellier, C.; Maxted, P. F. L.; Miller, G. R. M.; Pollacco, D.; Queloz, D.; Simpson, E.; Smalley, B.; Triaud, A. H. M. J.; Boisse, I.; Bouchy, F.; Gillon, M.; Hébrard, G. (2012). "Rossiter-Mc Laughlin effect measurements for WASP-16, WASP-25 and WASP-31★". Monthly Notices of the Royal Astronomical Society. 423 (2): 1503–1520. arXiv:1203.4971. Bibcode:2012MNRAS.423.1503B. doi:10.1111/j.1365-2966.2012.20973.x. S2CID 53445367.
  7. ^ The atmosphere of hot-Jupiter exoplanet WASP-31b
  8. ^ Gibson, Neale P.; De Mooij, Ernst J W.; Evans, Thomas M.; Merritt, Stephanie; Nikolov, Nikolay; Sing, David K.; Watson, Chris (2019). "Revisiting the potassium feature of WASP-31b at high resolution". Monthly Notices of the Royal Astronomical Society. 482 (1): 606–615. arXiv:1810.03693. Bibcode:2019MNRAS.482..606G. doi:10.1093/mnras/sty2722.
  9. ^ J. Chouqar, M. L. Morales, A. Daassou, A. Jabiri, Z. Benkhaldoun, Bruce G. Elmegreen, L. Viktor Tóth, Manuel Güdel, "Modeling the Transmission Spectra of WASP-31b"
  10. ^ McGruder, Chima D.; López-Morales, Mercedes; Espinoza, Néstor; Rackham, Benjamin V.; Apai, Dániel; Jordán, Andrés; Osip, David J.; Alam, Munazza K.; Bixel, Alex; Fortney, Jonathan J.; Henry, Gregory W.; Kirk, James; Lewis, Nikole K.; Rodler, Florian; Weaver, Ian C. (2020), "ACCESS: Confirmation of No Potassium in the Atmosphere of WASP-31b", The Astronomical Journal, 160 (5): 230, arXiv:2009.08472, Bibcode:2020AJ....160..230M, doi:10.3847/1538-3881/abb806, S2CID 221802525
  11. ^ Braam, Marrick; Van Der Tak, Floris F. S.; Chubb, Katy L.; Min, Michiel (2021), "Evidence for chromium hydride in the atmosphere of hot Jupiter WASP-31b", Astronomy & Astrophysics, 646: A17, arXiv:2011.10558, Bibcode:2021A&A...646A..17B, doi:10.1051/0004-6361/202039509, S2CID 227118876

External links edit

  Media related to WASP-31b at Wikimedia Commons

March 17, 2024
wasp, density, puffy, jupiter, extrasolar, planet, orbiting, metal, poor, solar, metallicity, dwarf, star, wasp, exoplanet, discovered, 2010, wasp, project, constellation, crater, about, 1305, light, years, light, travel, distance, from, earth, jupiter, exopla. WASP 31b is a low density puffy hot Jupiter extrasolar planet orbiting the metal poor 63 of solar metallicity dwarf star WASP 31 1 The exoplanet was discovered in 2010 by the WASP project 2 1 WASP 31b is in the constellation of Crater 3 and is about 1305 light years 4 light travel distance from Earth 2 WASP 31b Hot Jupiter exoplanet WASP 31b artist concept DiscoveryDiscovered byAnderson D R et al 1 Discovery siteWASP 2 Discovery date2010 2 Detection methodPrimary transit 2 Orbital characteristicsSemi major axis0 04657 0 00034 AUEccentricity0 2 Orbital period sidereal 3 40591 2 dInclination84 54 0 027 2 StarWASP 31 2 Physical characteristicsMean radius1 537 0 06 2 RJMass0 478 0 03 2 MJ Contents 1 Characteristics 2 See also 3 References 4 External linksCharacteristics editWASP 31b is a low density puffy hot Jupiter exoplanet with a mass about 0 48 times that of Jupiter and a radius about 1 55 times that of Jupiter 2 1 The planetary atmosphere has indeed the largest scale height equal to 1150km among exoplanets with measurable atmospheres as at 2021 5 The exoplanet orbits WASP 31 its host star every 3 4 days 2 nbsp Comparison of hot Jupiter exoplanets including WASP 31b top row 3rd from left artist concept From top left to lower right WASP 12b WASP 6b WASP 31b WASP 39b HD 189733b HAT P 12b WASP 17b WASP 19b HAT P 1b and HD 209458b In 2012 it was found from the Rossiter McLaughlin effect that WASP 31b is orbiting the parent star in a prograde direction with the WASP 31 star rotational axis inclined to the planetary orbit by 2 8 3 1 degrees 6 The spectroscopic study in 2014 revealed that WASP 31b has a dense cloud deck overlaid by a hazy atmosphere 7 WASP 31b was also reported to have significant amounts of potassium in its upper atmosphere but the detection of potassium was refuted in 2015 8 The potassium detection discrepancy was resolved in 2020 with the improved cloud deck model 9 with the best fit being a very small amount of water over clouds and no potassium at all 10 Reanalysis of planetary spectroscopic data in 2020 has revealed the presence of chromium monohydride besides water 11 See also editWASP 6b WASP 12b WASP 17b WASP 19b WASP 39b WASP 121bReferences edit a b c d Anderson D R et al 2011 WASP 31b a low density planet transiting a metal poor late F type dwarf star PDF Astronomy amp Astrophysics 531 A60 arXiv 1011 5882 Bibcode 2011A amp A 531A 60A doi 10 1051 0004 6361 201016208 S2CID 20154835 a b c d e f g h i j k l m Staff 2018 Planet WASP 31 b Extrasolar Planets Encyclopaedia Retrieved 2 March 2018 DJM 2018 Finding the constellation which contains given sky coordinates djm cc Retrieved 2 March 2018 Kyle 2018 Convert Parsecs to Light Years KylesConverter com Retrieved 2 March 2018 Baxter Claire Desert Jean Michel Tsai Shang Min Todorov Kamen O Bean Jacob L Deming Drake Parmentier Vivien Fortney Jonathan J Line Michael Thorngren Daniel Pierrehumbert Raymond T Burrows Adam Showman Adam P 2021 Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres Astronomy amp Astrophysics 648 A127 arXiv 2103 07185 doi 10 1051 0004 6361 202039708 S2CID 232222174 Brown D J A Cameron A Collier Anderson D R Enoch B Hellier C Maxted P F L Miller G R M Pollacco D Queloz D Simpson E Smalley B Triaud A H M J Boisse I Bouchy F Gillon M Hebrard G 2012 Rossiter Mc Laughlin effect measurements for WASP 16 WASP 25 and WASP 31 Monthly Notices of the Royal Astronomical Society 423 2 1503 1520 arXiv 1203 4971 Bibcode 2012MNRAS 423 1503B doi 10 1111 j 1365 2966 2012 20973 x S2CID 53445367 The atmosphere of hot Jupiter exoplanet WASP 31b Gibson Neale P De Mooij Ernst J W Evans Thomas M Merritt Stephanie Nikolov Nikolay Sing David K Watson Chris 2019 Revisiting the potassium feature of WASP 31b at high resolution Monthly Notices of the Royal Astronomical Society 482 1 606 615 arXiv 1810 03693 Bibcode 2019MNRAS 482 606G doi 10 1093 mnras sty2722 J Chouqar M L Morales A Daassou A Jabiri Z Benkhaldoun Bruce G Elmegreen L Viktor Toth Manuel Gudel Modeling the Transmission Spectra of WASP 31b McGruder Chima D Lopez Morales Mercedes Espinoza Nestor Rackham Benjamin V Apai Daniel Jordan Andres Osip David J Alam Munazza K Bixel Alex Fortney Jonathan J Henry Gregory W Kirk James Lewis Nikole K Rodler Florian Weaver Ian C 2020 ACCESS Confirmation of No Potassium in the Atmosphere of WASP 31b The Astronomical Journal 160 5 230 arXiv 2009 08472 Bibcode 2020AJ 160 230M doi 10 3847 1538 3881 abb806 S2CID 221802525 Braam Marrick Van Der Tak Floris F S Chubb Katy L Min Michiel 2021 Evidence for chromium hydride in the atmosphere of hot Jupiter WASP 31b Astronomy amp Astrophysics 646 A17 arXiv 2011 10558 Bibcode 2021A amp A 646A 17B doi 10 1051 0004 6361 202039509 S2CID 227118876External links edit nbsp Media related to WASP 31b at Wikimedia Commons Portals nbsp Astronomy nbsp Space Retrieved from https en wikipedia org w index php title WASP 31b amp oldid 1191208096, wikipedia, wiki, book, books, library,

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