WASP-104b

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WASP-104b
Discovery[1]
Discovery date2014
Detection method
transit
Orbital characteristics[2]
Eccentricity0.014+0.019
−0.010
Orbital period
1.75540646±0.00000028 d
Star
Physical characteristics
Mean radius
1.094±0.013RJ
Mass1.205+0.049
−0.044MJ

WASP-104b is a hot Jupiter exoplanet that orbits the star WASP-104.[1] It is considered to be one of the darkest exoplanets discovered.[3][4] WASP-104b was discovered in 2014; according to a 2018 study at Keele University, the planet's dense atmosphere of potassium and sodium absorbs more than 97% of light it receives.[3]

Characteristics[]

Colors of the planet[]

Researchers have considered WASP-104b to be one of the darkest exoplanets ever discovered.[3][5] In 2018, scientists from Keele University said the exoplanet's thick sodium and potassium atmosphere can absorb more than 97% of the light that falls on it.[3] A paper published by Cornell University Library describes the exoplanet as "darker than charcoal" and "one of the least reflective planets found to date", even darker than WASP-12 b which absorbs 94% of it receives.[3][6] The only other exoplanet thought to be darker than WASP-104b is TrES-2b.[3] Its reflectance has been compared with that of WASP-12b despite being somewhat darker.[7]

In 2020, a transmission spectroscopy study has indicated that WASP-104b has a red-colored cloud deck and possibly hazes.[8]

Size, radius, and temperature[]

WASP-104b's size is comparable to that of Jupiter; its mass and radius are 1.272 times and 1.137 times greater than Jupiter's, respectively.[9] It has 12.5 times the mass of Earth and a low density, and may be composed of gas.[9]

Orbit and host star[]

WASP-104b is the only known exoplanet to orbit WASP-104, a 3-billion-year-old G8 star. WASP-104b's orbital period is 1.8 days; it is located 2.6 million miles from its star and has an orbital radius of 0.02918 astronomical units (2,712,000 mi).[10][9] WASP-104 and its planet are located 466 light years away from the Sun in the constellation Leo.[9][3][10]

References[]

  1. ^ a b Smith, A. M. S.; et al. (2014). "WASP-104b and WASP-106b: Two transiting hot Jupiters in 1.75-day and 9.3-day orbits". Astronomy and Astrophysics. 570. A64. arXiv:1408.0887. Bibcode:2014A&A...570A..64S. doi:10.1051/0004-6361/201424752.
  2. ^ Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves, 2021, arXiv:2105.14851
  3. ^ a b c d e f g Lozovschi, Alexandra (23 April 2018). "'Darker Than Coal': Researchers Find A 'Hot Jupiter' That Absorbs Nearly 99 Percent Of Light". Inquisitr.
  4. ^ "Distant Jupiter-like world may be the darkest planet ever found". New Scientist. 20 April 2018.
  5. ^ Hignett, Katherine (23 April 2018). "Wasp-104b: Hot Jupiter Could Be Darkest Planet Ever Discovered". Newsweek.
  6. ^ Močnik, T.; Hellier, C.; Southworth, J. (2018). "WASP-104b is Darker Than Charcoal". The Astronomical Journal. 156 (2). 44. arXiv:1804.05334. Bibcode:2018AJ....156...44M. doi:10.3847/1538-3881/aacb26.
  7. ^ Jean-Pierre Chigne (24 April 2018). "WASP-104b Hot Jupiter Traps Nearly 99 Percent Of Light: What Is A Hot Jupiter And How Does It Form?". TechTimes.
  8. ^ An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b, 2020, arXiv:2011.06329
  9. ^ a b c d "WASP-104b". Exoplanet Exploration. 2014.
  10. ^ a b "WASP-104 b". Exoplanet Data Explorer.


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