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
Distance	1,300 ± 30 ly (397 ± 8 pc)
Details[1]
Mass	0.926+0.039 −0.034 M☉
Radius	1.071+0.019 −0.018 R☉
Surface gravity (log g)	4.346+0.023 −0.021 cgs
Temperature	5795+69 −64 K
Metallicity [Fe/H]	-0.098+0.05 −0.06 dex
Rotational velocity (v sin i)	2.4±1.6[2] km/s
Age	10.31+4.01 −2.55[3] Gyr
Other designations
WASP-37, DENIS J144746.5+010354, 2MASS J14474655+0103538, Gaia DR2 3652176997218325888[4]
Database references
SIMBAD	data

Star characteristics

WASP-37 has a low metallicity of just 40% of solar,^[5] and is likely older than Sun.^[2] WASP-37 does not have noticeable flare activity.^[6]

Planetary system

The "Hot Jupiter" class planet WASP-37b was discovered around WASP-37 in 2010.^[5] The study in 2018 has found the stability of orbits in habitable zone of WASP-37 is not significantly affected by WASP-37b planet.^[7]

The WASP-37 planetary system^[5][7][8]

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. Wang, Xian-Yu; Wang, Yong-Hao; Wang, Songhu; Wu, Zhen-Yu; Rice, Malena; Zhou, Xu; Hinse, Tobias C.; Liu, Hui-Gen; Ma, Bo; Peng, Xiyan; Zhang, Hui; Yu, Cong; Zhou, Ji-Lin; Laughlin, Gregory (2021), "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves", The Astrophysical Journal Supplement Series, 255 (1): 15, arXiv:2105.14851, Bibcode:2021ApJS..255...15W, doi:10.3847/1538-4365/ac0835, S2CID 235253975
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. 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.
4. WASP-37 -- Star
5. 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.
6. 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.
7. 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.
8. 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.