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WASP-25

Summary

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

WASP-25
Observation data
Epoch J2000      Equinox
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 mas[1]
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

Star characteristics edit

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 edit

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 edit

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. ^ a b c d Enoch, B.; Cameron, A. Collier; Anderson, D. R.; Lister, T. A.; Hellier, C.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Brown, D. J. A.; Gillon, M.; Hebb, L.; Lendl, M.; Parley, N.; Pepe, F.; Pollacco, D.; Segransan, D.; Simpson, E.; Street, R. A.; Udry, S. (2010). "WASP-25b: A 0.6 MJ planet in the Southern hemisphere". Monthly Notices of the Royal Astronomical Society: no. arXiv:1009.5917. doi:10.1111/j.1365-2966.2010.17550.x. S2CID 6314762.
  4. ^ Soubiran, C.; Jasniewicz, G.; Chemin, L.; Zurbach, C.; Brouillet, N.; Panuzzo, P.; Sartoretti, P.; Katz, D.; Le Campion, J. -F.; Marchal, O.; Hestroffer, D.; Thévenin, F.; Crifo, F.; Udry, S.; Cropper, M.; Seabroke, G.; Viala, Y.; Benson, K.; Blomme, R.; Jean-Antoine, A.; Huckle, H.; Smith, M.; Baker, S. G.; Damerdji, Y.; Dolding, C.; Frémat, Y.; Gosset, E.; Guerrier, A.; Guy, L. P.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
  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.; Queloz, D.; Simpson, E.; Smalley, B.; Triaud, A. H. M. J.; Boisse, I.; Bouchy, F.; Gillon, M.; Hébrard, G. (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. arXiv:1203.4971. Bibcode:2012MNRAS.423.1503B. doi:10.1111/j.1365-2966.2012.20973.x. S2CID 53445367.
  8. ^ Georgakarakos, Nikolaos; Eggl, Siegfried; Dobbs-Dixon, Ian (2018). "Giant Planets: Good Neighbors for Habitable Worlds?". The Astrophysical Journal. 856 (2): 155. arXiv:1804.02183. Bibcode:2018ApJ...856..155G. doi:10.3847/1538-4357/aaaf72. S2CID 119522834.
  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.; Gu, S.-H.; Hundertmark, M.; Jørgensen, U. G.; Juncher, D.; Kerins, E.; Mancini, L.; Rabus, M.; Ricci, D.; Schäfer, S.; Skottfelt, J.; Tregloan-Reed, J.; Wang, X.-B.; Wertz, O.; Alsubai, K. A.; Andersen, J. M.; Bozza, V.; Bramich, D. M.; Browne, P.; Ciceri, S.; d'Ago, G.; Damerdji, Y.; 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. arXiv:1407.6253. Bibcode:2014MNRAS.444..776S. doi:10.1093/mnras/stu1492. S2CID 53641330.