WASP-28b

Last updated
WASP-28b
Exoplanet Comparison WASP-28 b.png
Size comparison of WASP-28b with Jupiter.
Discovery [1]
Discovered by Wide Angle Search for Planets
Discovery date2010
Transit
Orbital characteristics
0.0442±0.0010 AU
Eccentricity <0.075 [2]
3.40883495±0.00000015 [2] d
Inclination 88.61 ± 0.67 [1]
Star WASP-28
Physical characteristics
1.319+0.028
−0.026 [3] RJ
Mass 0.948+0.051
−0.052 [3] MJ
Temperature 1468 ± 37 [1] K

    WASP-28b or K2-1b is an extrasolar planet discovered in 2010 [4] by the Wide Angle Search for Planets (WASP) project orbiting WASP-28, a magnitude 12 star also known as 1SWASP J233427.87-013448.1, 2MASS J23342787-0134482 and K2-1. [5] [1] Since it orbits its star very closely, the planet is a strongly irradiated hot Jupiter. [1] As seen from the Earth, WASP-28b transits its host star every 3.41 days taking about 3 hours to do so. [1]

    Contents

    The planet was observed by the Kepler space telescope during the K2 mission engineering campaign in February 2014 as part of an early science demonstration. [6] It was also observed from December 2016 to March 2017 during K2's campaign 12 which allowed a refinement of the system parameters. [2]

    Internal structure

    The planet seems to be a gas giant with a low core mass (<~10M(Earth)) and a low heavy elements content (Z<~0.2). [1]

    Related Research Articles

    The Hungarian Automated Telescope Network (HATNet) project is a network of six small fully automated "HAT" telescopes. The scientific goal of the project is to detect and characterize extrasolar planets using the transit method. This network is used also to find and follow bright variable stars. The network is maintained by the Center for Astrophysics | Harvard & Smithsonian.

    <span class="mw-page-title-main">HAT-P-4b</span> Exoplanet orbiting HAT-P-4b in the constellation Boötes

    HAT-P-4b is a confirmed extrasolar planet orbiting the star HAT-P-4 over 1000 light years away in Boötes constellation. It was discovered by transit on October 2, 2007, which looks for slight dimming of stars caused by planets that passed in front of them. It is the fourth planet discovered by the HATNet Project. It is also called BD+36 2593b, TYC 2569-01599-1b, 2MASS J15195792+3613467b, SAO 64638b.

    <span class="mw-page-title-main">HAT-P-5b</span>

    HAT-P-5b is a transiting extrasolar planet located approximately 1000 light-years away in the constellation of Lyra, orbiting the star HAT-P-5. It is a hot Jupiter with a mass 6% greater than Jupiter and a radius 26% greater than Jupiter, corresponding to a density of 0.66 g/cm3, which is less than water. This planet was found by Bakos et al. on October 9, 2007.

    HAT-P-4 is a wide binary star consisting of a pair of G-type main-sequence stars in the constellation of Boötes. It is also designated BD+36°2593.

    WASP-18 is a magnitude 9 star located 400 light-years away in the Phoenix constellation of the southern hemisphere. It has a mass of 1.29 solar masses.

    WASP-43 is a K-type star about 284 light-years away in the Sextans constellation. It is about half the size of the Sun, and has approximately half the mass. WASP-43 has one known planet in orbit, a Hot Jupiter called WASP-43b. At the time of publishing of WASP-43b's discovery on April 15, 2011, the planet was the most closely orbiting Hot Jupiter discovered. The small orbit of WASP-43b is thought to be caused by WASP-43's unusually low mass. WASP-43 was first observed between January and May 2009 by the SuperWASP project, and was found to be cooler and slightly richer in metals than the Sun. WASP-43 has also been found to be an active star that rotates at a high velocity.

    WASP-47 is a star similar in size and brightness to the Sun about 881 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.

    WASP-104b is a hot Jupiter exoplanet that orbits the star WASP-104. It is considered to be one of the darkest exoplanets discovered. 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.

    K2-28 is a metal rich M4-type main sequence star. One confirmed transiting exoplanet is known to orbit this star. There is another star 5.2 arcseconds to the north–east of K2-28. However, this star has a different proper motion, and is therefore physically unrelated and probably a background star.

    WASP-37 is a yellow main sequence star in the constellation of Virgo.

    WASP-36 is a yellow main sequence star in the Hydra constellation.

    WASP-55 is a G-type main-sequence star about 980 light-years away. The star is much younger than the Sun at approximately 1.1+0.8
    −0.6     billion years    . WASP-55 is similar to the Sun in concentration of heavy elements.

    WASP-75 is a F-type main-sequence star about 980 light-years away. The star is much younger than the Sun at approximately 2.9±0.2 billion years. WASP-75 is similar to the Sun in its concentration of heavy elements.

    WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years. WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain.

    References

    1. 1 2 3 4 5 6 7 Anderson, D. R.; et al. (2015). "WASP-20b and WASP-28b: A hot Saturn and a hot Jupiter in near-aligned orbits around solar-type stars". Astronomy and Astrophysics. 575 A61. arXiv: 1402.1482 . Bibcode: 2015A&A...575A..61A . doi: 10.1051/0004-6361/201423591 .
    2. 1 2 3 Močnik, T.; Hellier, C.; Anderson, D. R. (2020). "K2 Looks Toward WASP-28 and WASP-151". Publications of the Astronomical Society of the Pacific. 132 (1007) 014401: 014401. arXiv: 1710.08892 . Bibcode: 2020PASP..132a4401M . doi: 10.1088/1538-3873/ab5598 .
    3. 1 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.
    4. ↑ internet archive - WASP-28b: a hot Jupiter transiting a low-metallicity star
    5. ↑ "WASP-28". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved December 20, 2017.
    6. ↑ Howell, Steve B.; et al. (2014). "The K2 Mission: Characterization and Early Results". Publications of the Astronomical Society of the Pacific. 126 (938): 398–408. arXiv: 1402.5163 . Bibcode: 2014PASP..126..398H . doi: 10.1086/676406 .
    This page is based on this Wikipedia article
    Text is available under the CC BY-SA 4.0 license; additional terms may apply.
    Images, videos and audio are available under their respective licenses.