WASP-37

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

WASP-37
Observation data
Epoch J2000      Equinox
Constellation Virgo
Right ascension 14h 47m 46.5618s
Declination 01° 03 53.8024
Apparent magnitude (V) 12.704
Characteristics
Evolutionary stage main sequence star
Spectral type G2V
U−B color index 0.022
B−V color index 0.628
V−R color index 0.337
J−H color index 0.378
J−K color index 0.406
Astrometry
Radial velocity (Rv)7.927±0.0042 km/s
Proper motion (μ) RA: -28.082±0.069 mas/yr
Dec.: 18.018±0.062 mas/yr
Parallax (π)2.5183 ± 0.0493 mas
Distance1,300 ± 30 ly
(397 ± 8 pc)
Details[1][2]
Mass0.925±0.12 M
Radius1.003±0.053 R
Surface gravity (log g)4.386 cgs
Temperature5800±150 K
Metallicity [Fe/H]-0.40±0.12 dex
Rotational velocity (v sin i)2.4±1.6 km/s
Age10.31+4.01
2.55
 Gyr
Other designations
WASP-37, DENIS J144746.5+010354, 2MASS J14474655+0103538, Gaia DR2 3652176997218325888[3]
Database references
SIMBADdata

Star characteristics

WASP-37 has a low metallicity of just 40% of solar,[4] and is likely older than Sun.[2] WASP-37 does not have noticeable flare activity.[5]

Planetary system

The "Hot Jupiter" class planet WASP-37b was discovered around WASP-37 in 2010.[4] The study in 2018 has found the stability of orbits in habitable zone of WASP-37 is not significantly affected by WASP-37b planet.[6]

The WASP-37 planetary system[4][6][7]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.79±0.17 MJ 0.045±0.002 3.5774807±0.0000019 0 88.78° 1.16+0.07
0.06
 RJ

References

  1. Maxted, P. F. L.; Koen, C.; Smalley, B. (2011). "UBV(RI)C photometry of transiting planet hosting stars". Monthly Notices of the Royal Astronomical Society. 418 (2): 1039–1042. arXiv:1108.0349. Bibcode:2011MNRAS.418.1039M. doi:10.1111/j.1365-2966.2011.19554.x. S2CID 117056033.
  2. Brown, D. J. A. (2014). "Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?". Monthly Notices of the Royal Astronomical Society. 442 (2): 1844–1862. arXiv:1406.4402. Bibcode:2014MNRAS.442.1844B. doi:10.1093/mnras/stu950. S2CID 56052792.
  3. WASP-37 -- Star
  4. Simpson, E. K.; Faedi, F.; Barros, S. C. C.; Brown, D. J. A.; Cameron, A. Collier; Hebb, L.; Pollacco, D.; Smalley, B.; Todd, I.; Butters, O. W.; Hébrard, G.; McCormac, J.; Miller, G. R. M.; Santerne, A.; Street, R. A.; Skillen, I.; Triaud, A. H. M. J.; Anderson, D. R.; Bento, J.; Boisse, I.; Bouchy, F.; Enoch, B.; Haswell, C. A.; Hellier, C.; Holmes, S.; Horne, K.; Keenan, F. P.; Lister, T. A.; Maxted, P. F. L.; et al. (2011). "WASP-37b: A 1.8MJEXOPLANET TRANSITING a METAL-POOR STAR". The Astronomical Journal. 141 (1): 8. arXiv:1008.3096. Bibcode:2011AJ....141....8S. doi:10.1088/0004-6256/141/1/8. S2CID 20036137.
  5. Shkolnik, Evgenya L. (2013). "An Ultraviolet Investigation of Activity on Exoplanet Host Stars". The Astrophysical Journal. 766 (1): 9. arXiv:1301.6192. Bibcode:2013ApJ...766....9S. doi:10.1088/0004-637X/766/1/9. S2CID 118415788.
  6. 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.
  7. Mallonn, M.; von Essen, C.; Herrero, E.; Alexoudi, X.; Granzer, T.; Sosa, M.; Strassmeier, K. G.; Bakos, G.; Bayliss, D.; Brahm, R.; Bretton, M.; Campos, F.; Carone, L.; Colón, K. D.; Dale, H. A.; Dragomir, D.; Espinoza, N.; Evans, P.; Garcia, F.; Gu, S.-H.; Guerra, P.; Jongen, Y.; Jordán, A.; Kang, W.; Keles, E.; Kim, T.; Lendl, M.; Molina, D.; Salisbury, M.; et al. (2019). "Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties". Astronomy & Astrophysics. 622: A81. arXiv:1812.05882. Bibcode:2019A&A...622A..81M. doi:10.1051/0004-6361/201834194. S2CID 92990448.


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