Astronomy:WASP-1b

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WASP-1b
Size comparison of WASP-1b with Jupiter
Discovery
Discovered byCameron et al. [1](SuperWASP
and SOPHIE)
 South Africa
and  France
Discovery siteSAAO
Discovery dateSeptember 25, 2006
Transit
Orbital characteristics
0.03958 +0.00047−0.00049[2] AU
Eccentricity<0.013[2]
Orbital period2.51994701 ± 0.00000030[3] d
Inclination90.0 ± 1.3°[3]
astron|astron|helion}}2,456,031.78981±0.00020[3]
91.10+170.00
−6.30[4]
Semi-amplitude118.7+1.9
−2.0 m/s[2]
StarWASP-1
Physical characteristics
Mean radius1.612+0.137
−0.230[5] |♃|J}}}}}}
Mass0.948+0.029
−0.028[2] |♃|J}}}}}}
Mean density0.339+0.037
−0.034[2] g cm−3
12.5 m/s2 (41 ft/s2)
1.27 g
Physics1812±14 K


WASP-1b is an extrasolar planet orbiting the star WASP-1 located 1,300 light-years away in the constellation Andromeda.

Orbit and mass

The radial velocity trend of WASP-1, caused by the presence of WASP-1 b

The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. Unlike Jupiter, but similar to many other planets detected around other stars, WASP-1b is located very close to its star, and belongs to the class of planets known as hot Jupiters.

WASP-1 b was discovered via the transit method by SuperWASP, for which the star and planet are named. Follow-up radial velocity measurements confirmed the presence of an unseen companion, and allowed for the mass of WASP-1 b to be determined.[1]

In 2018, it was discovered via observations of the Rossiter-McLaughlin effect that the orbit of WASP-1b is strongly misaligned with rotational axis of the star by 79.0+4.3−4.5 degrees, making it a nearly "polar" orbit.[6]

See also

References

  1. ↑ 1.0 1.1 Cameron, A. Collier; Bouchy, F.; Hébrard, G.; Maxted, P.; Pollacco, D.; Pont, F.; Skillen, I.; Smalley, B. et al. (2007). "WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE". Monthly Notices of the Royal Astronomical Society 375 (3): 951–957. doi:10.1111/j.1365-2966.2006.11350.x. Bibcode: 2007MNRAS.375..951C. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Bonomo, A. S.; Desidera, S.; Benatti, S.; Borsa, F.; Crespi, S.; Damasso, M.; Lanza, A. F.; Sozzetti, A. et al. (2017-06-01). "The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy and Astrophysics 602: A107. doi:10.1051/0004-6361/201629882. ISSN 0004-6361. Bibcode: 2017A&A...602A.107B. 
  3. ↑ 3.0 3.1 3.2 Kokori, A. et al. (March 1, 2023). "ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations". The Astrophysical Journal Supplement Series 265 (1): 4. doi:10.3847/1538-4365/ac9da4. ISSN 0067-0049. Bibcode: 2023ApJS..265....4K. 
  4. ↑ Knutson, Heather A.; Fulton, Benjamin J.; Montet, Benjamin T.; Kao, Melodie; Ngo, Henry; Howard, Andrew W.; Crepp, Justin R.; Hinkley, Sasha et al. (April 2014). "Friends of Hot Jupiters. I. A Radial Velocity Search for Massive, Long-period Companions to Close-in Gas Giant Planets". The Astrophysical Journal 785 (2): 126. doi:10.1088/0004-637X/785/2/126. Bibcode: 2014ApJ...785..126K. 
  5. ↑ Johns, Daniel; Marti, Connor; Huff, Madison; McCann, Jacob; Wittenmyer, Robert A.; Horner, Jonathan; Wright, Duncan J. (2018-11-01). "Revised Exoplanet Radii and Habitability Using Gaia Data Release 2". The Astrophysical Journal Supplement Series 239 (1): 14. doi:10.3847/1538-4365/aae5fb. ISSN 0067-0049. Bibcode: 2018ApJS..239...14J. 
  6. ↑ Simpson, E. K.; Pollacco, D.; Cameron, A. Collier; Hébrard, G.; Anderson, D. R.; Barros, S. C. C.; Boisse, I.; Bouchy, F. et al. (2011). "The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P-8b from Rossiter-Mc Laughlin observations★". Monthly Notices of the Royal Astronomical Society 414 (4): 3023–3035. doi:10.1111/j.1365-2966.2011.18603.x. Bibcode: 2011MNRAS.414.3023S. 

Further reading

Coordinates: Sky map 00h 20m 40s, +31° 59′ 24″



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