Astronomy:WASP-55
WASP-55 is a G-type main-sequence star about 954 light-years away in the constellation Virgo. The star is much younger than the Sun at approximately 1.1+0.8
−0.6 billion years.[1] WASP-55 is similar to the Sun in concentration of heavy elements.[2]
A multiplicity survey in 2016 found one candidate stellar companion to WASP-55 at a projected separation of 4.435″±0.018″.[3] Follow-up observations in 2017 were unable to confirm if the suspected companion red dwarf star, with a temperature of 3,340±90 K, is gravitationally bound to WASP-55 or not.[4] It was confirmed in 2019 using Gaia DR2 data.[5]
Planetary system
In 2012 a transiting hot Jupiter planet, WASP-55b, was detected on a tight, circular orbit.[6] Its equilibrium temperature is 1,305 K.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.62±0.04 MJ | 0.0558±0.0006 | 4.4656291(11)[1] | <0.056[8] | 89.0±0.2° | 1.34±0.01 RJ |
References
- ↑ 1.0 1.1 Southworth, John et al. (2016). "High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55". Monthly Notices of the Royal Astronomical Society 457 (4): 4205. doi:10.1093/mnras/stw279. Bibcode: 2016MNRAS.457.4205S.
- ↑ Petigura, Erik A.; Crossfield, Ian J. M.; Isaacson, Howard; Beichman, Charles A.; Christiansen, Jessie L.; Dressing, Courtney D.; Fulton, Benjamin J.; Howard, Andrew W. et al. (2018). "Planet Candidates from K2 Campaigns 5-8 and Follow-up Optical Spectroscopy". The Astronomical Journal 155 (1): 21. doi:10.3847/1538-3881/aa9b83. Bibcode: 2018AJ....155...21P.
- ↑ Evans, D. F.; Southworth, J.; Maxted, P. F. L.; Skottfelt, J.; Hundertmark, M.; Jørgensen, U. G.; Dominik, M.; Alsubai, K. A. et al. (2016), "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). I. Lucky imaging observations of 101 systems in the southern hemisphere", Astronomy & Astrophysics 589: A58, doi:10.1051/0004-6361/201527970, Bibcode: 2016A&A...589A..58E
- ↑ Evans, D. F.; Southworth, J.; Smalley, B.; Jørgensen, U. G.; Dominik, M.; Andersen, M. I.; Bozza, V.; Bramich, D. M. et al. (2018), "High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016", Astronomy & Astrophysics 610: A20, doi:10.1051/0004-6361/201731855, Bibcode: 2018A&A...610A..20E
- ↑ Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society 490 (4): 5088–5102. doi:10.1093/mnras/stz2673. Bibcode: 2019MNRAS.490.5088M.
- ↑ Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Jehin, E.; Lendl, M. et al. (2012), "Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b", Monthly Notices of the Royal Astronomical Society 426 (1): 739–750, doi:10.1111/j.1365-2966.2012.21780.x, Bibcode: 2012MNRAS.426..739H
- ↑ 7.0 7.1 Clark, B. J. M.; Anderson, D. R.; Hellier, C.; Turner, O. D.; Močnik, T. (2018). "An analysis of transiting hot Jupiters observed with K2: WASP-55b and WASP-75b". Publications of the Astronomical Society of the Pacific 130 (985): 034401. doi:10.1088/1538-3873/aaa33e. Bibcode: 2018PASP..130c4401C.
- ↑ Bonomo, A. S. et al. (June 2017). "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 & Astrophysics 602: A107. doi:10.1051/0004-6361/201629882. Bibcode: 2017A&A...602A.107B.
Cite error: <ref> tag with name "simbad" defined in <references> is not used in prior text.
Cite error: <ref> tag with name "GaiaDR3" defined in <references> is not used in prior text.
<ref> tag with name "hu2020" defined in <references> is not used in prior text.Coordinates: 
13h 35m 01.9538s, −17° 30′ 12.5263″
 |  |
