WASP-32
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces[1] |
| Right ascension | 00h 15m 50.80773s[2] |
| Declination | +01° 12′ 01.5889″[2] |
| Apparent magnitude (V) | 11.26[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | mid-F[4] |
| B−V color index | -0.2[citation needed] |
| J−H color index | 0.005[citation needed] |
| J−K color index | 0.342[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | 18.27±0.32[2] km/s |
| Proper motion (μ) | RA: 1.951 mas/yr[2] Dec.: 16.447 mas/yr[2] |
| Parallax (π) | 3.5706±0.0373 mas[2] |
| Distance | 913 ± 10 ly (280 ± 3 pc) |
| Details[5] | |
| Mass | 1.10±0.03[4] M☉ |
| Radius | 1.09±0.03 R☉ |
| Luminosity | 1.6[2] L☉ |
| Surface gravity (log g) | 4.39±0.03[4] cgs |
| Temperature | 6140+90 −100 K |
| Metallicity [Fe/H] | −0.13±0.10 dex |
| Rotation | 11.6±1.0 d |
| Rotational velocity (v sin i) | 3.9+0.4 −0.5 km/s |
| Age | 2.22+0.62 −0.73 Gyr |
| Other designations | |
| Parumleo, TOI-4523, TIC 427332229, WASP-32, TYC 2-1155-1, 2MASS J00155080+0112016[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-32, also named Parumleo, is an F-type main-sequence star about 913 light-years away in the constellation of Pisces.
Nomenclature
[edit]The designation WASP-32 comes from the Wide Angle Search for Planets.
This system was seletected to be named in the 2019 NameExoWorlds campaign, where it was assigned to Singapore. The star was given the formal name Parumleo in January 2020, Latin for small lion and referencing the national animal of Singapore.[7][8]
Stellar characteristics
[edit]The WASP-32 star is relatively depleted of lithium, which is common for massive stars hosting hot Jupiter planets.[4]
Planetary system
[edit]The hot Jupiter class planet WASP-32b, later named Viculus, was discovered around WASP-32 in 2010.[4] It was found to orbit the parent star in a prograde direction in 2014.[9]
A follow-up study utilizing transit-timing variation analysis failed to find any such variation, so there is no evidence of other massive planets around WASP-32 as of 2015.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Viculus) | 3.49+0.12 −0.11 MJ |
0.03904+0.00062 −0.00061 |
2.7186591(24) | <0.004 | 85.1±0.2° | 1.10±0.04 RJ |
References
[edit]- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ 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.
- ^ a b c d e f 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.
- ^ a b Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.
- ^ "WASP-32". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-05-09.
- ^ A star and its orbiting planet now bear names with Singapore connection
- ^ "Approved names". NameExoworlds. Retrieved 2 January 2020.
- ^ 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.
- ^ Sun, Lei-Lei; Gu, Sheng-Hong; et al. (January 2015). "Long-term transit timing monitoring and homogenous study of WASP-32". Research in Astronomy and Astrophysics. 15 (1): 117–126. Bibcode:2015RAA....15..117S. doi:10.1088/1674-4527/15/1/011.
