Astronomy:WASP-45
Observation data Equinox J2000.0]] (ICRS) | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 20m 56.99413s[1] |
Declination | −35° 59′ 53.7466″[1] |
Apparent magnitude (V) | 11.8[2] |
Characteristics | |
Spectral type | K2V[3] |
Astrometry | |
Radial velocity (Rv) | 4.71±0.33[1] km/s |
Proper motion (μ) | RA: 52.831[1] mas/yr Dec.: −46.940[1] mas/yr |
Parallax (π) | 4.6520 ± 0.0226[1] mas |
Distance | 701 ± 3 ly (215 ± 1 pc) |
Details[4] | |
Mass | 0.932+0.045 −0.046 M☉ |
Radius | 0.891±0.013 R☉ |
Luminosity | 0.510±0.013 L☉ |
Surface gravity (log g) | 4.508+0.023 −0.025 cgs |
Temperature | 5167±29 K |
Metallicity [Fe/H] | 0.388+0.090 −0.10 dex |
Rotational velocity (v sin i) | 2.3±0.7 km/s |
Age | 5.4+4.7 −3.5 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
WASP-45 is a K-type main-sequence star about 701 light-years (215 parsecs) away. The star's age cannot be well constrained, but it is probably older than the Sun. Yet, WASP-45 is enriched in heavy elements compared to the Sun, having 240% of the solar abundance.[4]
The star has low ultraviolet emission, therefore it is suspected to have a low starspot activity,[5] although chromospheric activity was reported elsewhere.[3]
There is a companion star at a separation of 4.4 arcseconds, corresponding to 929 AU.[6]
Planetary system
In 2011 a transiting hot Jupiter planet, WASP-45b, was detected.[3] The planet equilibrium temperature is 1170±24 K. No Rayleigh scattering was detected in the planetary atmosphere, implying the existence of hazes or a high cloud deck.[7]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.018+0.046 −0.045 MJ |
0.04089+0.00065 −0.00069 |
3.1260876(35)[8] | <0.043[8] | 84.686±0.098° | 0.978+0.026 −0.024 RJ |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 "WASP-45". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WASP-45.
- ↑ 3.0 3.1 3.2 Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Queloz, D. et al. (2012), "WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets", Monthly Notices of the Royal Astronomical Society 422 (3): 1988–1998, doi:10.1111/j.1365-2966.2012.20635.x, Bibcode: 2012MNRAS.422.1988A
- ↑ 4.0 4.1 4.2 Addison, Brett; Wright, Duncan J.; Wittenmyer, Robert A.; Horner, Jonathan; Mengel, Matthew W.; Johns, Daniel; Marti, Connor; Nicholson, Belinda et al. (2019), "MINERVA-Australis I: Design, Commissioning, & First Photometric Results", Publications of the Astronomical Society of the Pacific 131 (1005): 115003, doi:10.1088/1538-3873/ab03aa, Bibcode: 2019PASP..131k5003A
- ↑ Shkolnik, Evgenya L. (2013), "An Ultraviolet Investigation of Activity on Exoplanet Host Stars", The Astrophysical Journal 766 (1): 9, doi:10.1088/0004-637X/766/1/9, Bibcode: 2013ApJ...766....9S
- ↑ Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society 490 (4): 5088–5102. doi:10.1093/mnras/stz2673. Bibcode: 2019MNRAS.490.5088M.
- ↑ 7.0 7.1 Ciceri, S.; Mancini, L.; Southworth, J.; Lendl, M.; Tregloan-Reed, J.; Brahm, R.; Chen, G.; d'Ago, G. et al. (2016), "Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multi-band photometry", Monthly Notices of the Royal Astronomical Society 456 (1): 990–1002, doi:10.1093/mnras/stv2698, Bibcode: 2016MNRAS.456..990C
- ↑ 8.0 8.1 Bonomo, A. 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. doi:10.1051/0004-6361/201629882. Bibcode: 2017A&A...602A.107B.
Coordinates: 00h 20m 56.9940s, −35° 59′ 53.7474″
![]() | Original source: https://en.wikipedia.org/wiki/WASP-45.
Read more |