WASP-104b

Last updated
WASP-104b
Discovery [1]
Discovery date2014
transit
Orbital characteristics [2]
Eccentricity 0.014+0.019
−0.010
1.75540646±0.00000028 d
Star WASP-104
Physical characteristics
Mean radius
1.094±0.013RJ
Mass 1.205+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]

    Contents

    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-12b 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]

    Related Research Articles

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    <span class="mw-page-title-main">TrES-2b</span> Exoplanet in the constellation Draco

    TrES-2b (Kepler-1b) is an extrasolar planet orbiting the star GSC 03549-02811 located 750 light years away from the Solar System. The planet was identified in 2011 as the darkest known exoplanet, reflecting less than 1% of any light that hits it. Reflecting less light than charcoal, on the surface the planet is said to be pitch black. The planet's mass and radius indicate that it is a gas giant with a bulk composition similar to that of Jupiter. Unlike Jupiter, but similar to many planets detected around other stars, TrES-2b is located very close to its star and belongs to the class of planets known as hot Jupiters. This system was within the field of view of the Kepler spacecraft.

    <span class="mw-page-title-main">HD 189733 b</span> Hot Jupiter exoplanet in the constellation Vulpecula

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    <span class="mw-page-title-main">HAT-P-7b</span> Super Jupiter orbiting HAT-P-7

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    <span class="mw-page-title-main">WASP-12b</span> Hot Jupiter exoplanet in the constellation Auriga

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    <span class="mw-page-title-main">WASP-17b</span> Hot-Jupiter exoplanet in the orbit of the star WASP-17

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    <span class="mw-page-title-main">XO-6b</span> Hot Jupiter exoplanet orbiting the star XO-6

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    WASP-47 is a star similar in size and brightness to the Sun about 870 light-years away in the constellation Aquarius. It lies within the Kepler K2 campaign field 3. It was first noticed to have a hot Jupiter exoplanet orbiting every 4 days in 2012 by the Wide Angle Search for Planets (WASP) team. While it was thought to be a typical hot Jupiter system, three more planets were found in 2015: an outer gas giant within the habitable zone, a hot Neptune exterior to the hot Jupiter's orbit and a super-Earth interior to the hot Jupiter's orbit. WASP-47 is the only planetary system known to have both planets near the hot Jupiter and another planet much further out.

    <span class="mw-page-title-main">WASP-31b</span> Hot Jupiter orbiting the star WASP-31

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    WASP-107b is a super-Neptune exoplanet that orbits the star WASP-107. It lies 200 light-years away from Earth in the constellation Virgo. Its discovery was announced in 2017 by a team led by D. R. Anderson via the WASP-South.

    Qatar-2 is a K-type main-sequence star about 595 light-years away in the constellation of Virgo. The star is much older than Sun, and has a concentration of heavy elements similar to solar abundance. The star features a numerous and long-lived starspots, and belongs to a peculiar variety of inflated K-dwarfs with strong magnetic activity inhibiting internal convection.

    WASP-72 is the primary of a binary star system. It is an F7 class dwarf star, with an internal structure just on the verge of the Kraft break. It is orbited by a planet WASP-72b. The age of WASP-72 is younger than the Sun at 3.55±0.82 billion years.

    References

    1. 1 2 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. S2CID   119245284.
    2. ↑ Wang, Xian-Yu; et al. (1 July 2021). "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves". The Astrophysical Journal Supplement Series. 255 (1). 15. arXiv: 2105.14851 . Bibcode:2021ApJS..255...15W. doi: 10.3847/1538-4365/ac0835 . S2CID   235253975.
    3. 1 2 3 4 5 6 7 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 . S2CID   119361462.
    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. ↑ Chen, G.; Pallé, E.; Parviainen, H.; Wang, H.; Van Boekel, R.; Murgas, F.; Yan, F.; Béjar, V J S.; Casasayas-Barris, N.; Crouzet, N.; Esparza-Borges, E.; Fukui, A.; Garai, Z.; Kawauchi, K.; Kurita, S.; Kusakabe, N.; De Leon, J. P.; Livingston, J.; Luque, R.; Madrigal-Aguado, A.; Mori, M.; Narita, N.; Nishiumi, T.; Oshagh, M.; Sánchez-Benavente, M.; Tamura, M.; Terada, Y.; Watanabe, N. (2021), "An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b", Monthly Notices of the Royal Astronomical Society, 500 (4): 5420–5435, arXiv: 2011.06329 , doi:10.1093/mnras/staa3555
    9. 1 2 3 4 "WASP-104b". Exoplanet Exploration. 2014.
    10. 1 2 "WASP-104 b". Exoplanet Data Explorer . Archived from the original on 2018-04-24. Retrieved 2018-04-23.


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