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WASP-32

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(Redirected from WASP-32b) Star in the constellation Pisces
WASP-32 / Parumleo
Observation data
Epoch J2000      Equinox
Constellation Pisces
Right ascension 00 15 50.80778
Declination 01° 12′ 01.5868″
Apparent magnitude (V) 11.26
Characteristics
Evolutionary stage main sequence star
Spectral type G0V
B−V color index -0.2
J−H color index 0.005
J−K color index 0.342
Astrometry
Radial velocity (Rv)18.41±0.83 km/s
Proper motion (μ) RA: 1.896±0.09 mas/yr
Dec.: 16.589±0.062 mas/yr
Parallax (π)3.5949 ± 0.0431 mas
Distance910 ± 10 ly
(278 ± 3 pc)
Details
Mass1.10±0.03 M
Radius1.11±0.05 R
Luminosity1.5 L
Surface gravity (log g)4.39±0.03 cgs
Temperature6100±100 K
Metallicity −0.13±0.10 dex
Rotational velocity (v sin i)4.8±0.8 km/s
Other designations
Parumleo, Gaia DR2 2546413408888429696, TYC 2-1155-1, 2MASS J00155080+0112016
Database references
SIMBADdata

WASP-32 (also known as TYC 2-1155-1) is a yellow main-sequence star in the constellation of Pisces. The star was given the formal name Parumleo in January 2020, Latin for small lion and referencing the national animal of Singapore.

Star characteristics

The WASP-32 star is relatively depleted of lithium, which is common for massive stars hosting hot Jupiter planets.

Planetary system

The "hot Jupiter" class planet WASP-32 b, later named Viculus, was discovered around WASP-32 in 2010. It was found to orbit the parent star in prograde direction in 2014.

The follow-up study utilizing transit timing variation analysis, have failed to find any, therefore have excluded existence of other massive planets around WASP-32 as in 2015.

The WASP-32 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b (Viculus) 3.6±0.07 MJ 0.0394±0.0003 2.71865±0.00008 0.018±0.0065 85.3±0.5° 1.18±0.07 RJ

References

  1. ^ 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.
  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. "WASP-32". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-05-09.
  4. ^ Maxted, P. F. L.; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Enoch, R.; Lister, T. A.; Pepe, F.; Pollacco, D. L.; Ségransan, D.; Skillen, I.; Udry, S. (2010). "WASP-32b: A Transiting Hot Jupiter Planet Orbiting a Lithium-Poor, Solar-Type Star". Publications of the Astronomical Society of the Pacific. 122 (898): 1465–1470. arXiv:1010.1742. Bibcode:2010PASP..122.1465M. doi:10.1086/657658. S2CID 55625415.
  5. A star and its orbiting planet now bear names with Singapore connection
  6. Brothwell, R. D.; Watson, C. A.; Hébrard, G.; Triaud, A. H. M. J.; Cegla, H. M.; Santerne, A.; Hébrard, E.; Anderson, D. R.; Pollacco, D.; Simpson, E. K.; Bouchy, F.; Brown, D. J. A.; Chew, Y. Gómez Maqueo; Cameron, A. Collier; Armstrong, D. J.; Barros, S. C. C.; Bento, J.; Bochinski, J.; Burwitz, V.; Busuttil, R.; Delrez, L.; Doyle, A. P.; Faedi, F.; Fumel, A.; Gillon, M.; Haswell, C. A.; Hellier, C.; Jehin, E.; Kolb, U.; et al. (2014). "A window on exoplanet dynamical histories: Rossiter–Mc Laughlin observations of WASP-13b and WASP-32b". Monthly Notices of the Royal Astronomical Society. 440 (4): 3392–3401. arXiv:1403.4095. Bibcode:2014MNRAS.440.3392B. doi:10.1093/mnras/stu520. S2CID 118435056.
  7. Lei-Lei Sun, Sheng-Hong Gu, Xiao-Bin Wang at al., "Long-term transit timing monitoring and homogenous study of WASP-32", 2015
  8. Planet WASP-32 b
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