Astronomy:WASP-25

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Short description: Star in the constellation Hydra
WASP-25
Observation data
Equinox J2000.0]] (ICRS)
Constellation Hydra
Right ascension  13h 01m 26.3760s[1]
Declination −27° 31′ 19.9208″[1]
Apparent magnitude (V) 11.87[2]
Characteristics
Evolutionary stage main sequence star
Spectral type G4[3]
B−V color index 0.45
J−H color index 0.328[citation needed]
J−K color index 0.422[citation needed]
Astrometry
Radial velocity (Rv)-2.698±0.0028[4] km/s
Proper motion (μ) RA: -29.268±0.061[1] mas/yr
Dec.: -6.293±0.047[1] mas/yr
Parallax (π)4.714 ± 0.0324[1] mas
Distance692 ± 5 ly
(212 ± 1 pc)
Details[3][5]
Mass1.00±0.03 M
Radius0.92 R
Surface gravity (log g)4.50±0.15 cgs
Temperature5615±55 K
Metallicity [Fe/H]-0.07±0.1 dex
Rotational velocity (v sin i)3.0±1 km/s
Age0.02+3.96−0.01 Gyr
Other designations
WASP-25, Gaia DR2 6186950525042445824, TYC 6706-861-1, 2MASS J13012637-2731199, DENIS J130126.3-273120[6]
Database references
SIMBADdata

WASP-25 is a yellow main sequence star in the constellation of Hydra.

Star characteristics

WASP-25 is slightly metal-poor (85% of Solar amount) and is probably a young star which has just entered the main sequence.[3]

Planetary system

The "Hot Jupiter" class planet WASP-25b was discovered around WASP-25 in 2010.[3] The planet would have an equilibrium temperature of 1212±35 K. A Rossiter-McLaughlin effect based study in 2011 found a modest misalignment of the planetary orbit to the rotational axis of the parent star, equal to 14.6±6.7 degrees.[7] A habitability study in 2018 found WASP-25b does not adversely affect the stability of planetary orbits in the habitable zone of WASP-25.[8]

The WASP-25 planetary system[9][10]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 0.58±0.04 MJ 0.0474±0.0004 3.764825±0.000005 0 88.33±0.32° 1.26+0.06−0.05 RJ

References

  1. 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode2000A&A...355L..27H. 
  3. 3.0 3.1 3.2 3.3 Enoch, B.; Cameron, A. Collier; Anderson, D. R.; Lister, T. A.; Hellier, C.; Maxted, P. F. L.; Queloz, D.; Smalley, B. et al. (2010). "WASP-25b: A 0.6 MJ planet in the Southern hemisphere". Monthly Notices of the Royal Astronomical Society: no. doi:10.1111/j.1365-2966.2010.17550.x. 
  4. Soubiran, C.; Jasniewicz, G.; Chemin, L.; Zurbach, C.; Brouillet, N.; Panuzzo, P.; Sartoretti, P.; Katz, D. et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics 616: A7. doi:10.1051/0004-6361/201832795. Bibcode2018A&A...616A...7S. 
  5. Maxted, P. F. L., Koen, C., Smalley, B., 2011, MNRAS, 418, 1039
  6. WASP-25 -- Star
  7. Brown, D. J. A.; Cameron, A. Collier; Anderson, D. R.; Enoch, B.; Hellier, C.; Maxted, P. F. L.; Miller, G. R. M.; Pollacco, D. et al. (2012). "Rossiter-Mc Laughlin effect measurements for WASP-16, WASP-25 and WASP-31★". Monthly Notices of the Royal Astronomical Society 423 (2): 1503–1520. doi:10.1111/j.1365-2966.2012.20973.x. Bibcode2012MNRAS.423.1503B. 
  8. Georgakarakos, Nikolaos; Eggl, Siegfried; Dobbs-Dixon, Ian (2018). "Giant Planets: Good Neighbors for Habitable Worlds?". The Astrophysical Journal 856 (2): 155. doi:10.3847/1538-4357/aaaf72. Bibcode2018ApJ...856..155G. 
  9. Planet WASP-25 b at exoplanet.eu
  10. Southworth, John; Hinse, T. C.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Galianni, P.; Gerner, T.; Giannini, E. et al. (2014). "High-precision photometry by telescope defocussing – VI. WASP-24, WASP-25 and WASP-26★". Monthly Notices of the Royal Astronomical Society 444 (1): 776–789. doi:10.1093/mnras/stu1492. Bibcode2014MNRAS.444..776S.