WASP-25
WASP-25 is a yellow main sequence star in the constellation of Hydra.
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Hydra |
| Right ascension | 13h 01m 26.3760s |
| Declination | −27° 31′ 19.9208″ |
| Apparent magnitude (V) | 11.87 |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | G4V |
| B−V color index | 0.45 |
| J−H color index | 0.328 |
| J−K color index | 0.422 |
| Astrometry | |
| Radial velocity (Rv) | -2.698±0.0028 km/s |
| Proper motion (μ) | RA: -29.268±0.061 mas/yr Dec.: -6.293±0.047 mas/yr |
| Parallax (π) | 4.714 ± 0.0324[1] mas |
| Distance | 692 ± 5 ly (212 ± 1 pc) |
| Details[2][3] | |
| Mass | 1.00±0.03 M☉ |
| Radius | 0.92 R☉ |
| Surface gravity (log g) | 4.50±0.15 cgs |
| Temperature | 5615±55 K |
| Metallicity [Fe/H] | -0.07±0.1 dex |
| Rotational velocity (v sin i) | 3.0±1 km/s |
| Age | 0.02+3.96 −0.01 Gyr |
| Other designations | |
WASP-25, TYC 6706-861-1, DENIS J130126.3-273120, 2MASS J13012637-2731199, Gaia DR2 6186950525042445824 | |
Star characteristics
WASP-25 is slightly metal-poor (85% of Solar amount) and is probably a young star which has just entered the main sequence.[2]
Planetary system
The "Hot Jupiter" class planet WASP-25b was discovered around WASP-25 in 2010.[2] The planet would have an equilibrium temperature of 1212±35 K. A Rossiter-McLaughlin effect based study in 2011 found a modest misalignment of the planetary orbit to the rotational axis of the parent star, equal to 14.6±6.7 degrees.[4] A habitability study in 2018 found WASP-25b does not adversely affect the stability of planetary orbits in the habitable zone of WASP-25.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.58±0.04 MJ | 0.0474±0.0004 | 3.764825±0.000005 | 0 | 88.33±0.32° | 1.26+0.06 −0.05 RJ |
gollark: Most sensible domain providers have "WHOIS privacy" now, so you can't.
gollark: It does also mean you can do fun stuff like images which look different if opened in browsers instead of being embedded.
gollark: <@183773411078569984> Images displayed in Discord are actually fetched through Discord's servers, so you can't get people's IPs without actual user interaction.
gollark: It's not a very hot take. I'm just annoyed that people somehow think that the random thing someone told them is definitely true and decide to attempt to bother thousands of people about it.
gollark: Why do people keep *spreading* these ridiculous announcements about things, and trying to ping several thousand people about them?
References
- WASP-25 -- Star
- Enoch, B.; Cameron, A. Collier; Anderson, D. R.; Lister, T. A.; Hellier, C.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Brown, D. J. A.; Gillon, M.; Hebb, L.; Lendl, M.; Parley, N.; Pepe, F.; Pollacco, D.; Segransan, D.; Simpson, E.; Street, R. A.; Udry, S. (2010). "WASP-25b: A 0.6 MJ planet in the Southern hemisphere". Monthly Notices of the Royal Astronomical Society: no. arXiv:1009.5917. doi:10.1111/j.1365-2966.2010.17550.x.
- Maxted, P. F. L., Koen, C., Smalley, B., 2011, MNRAS, 418, 1039
- Brown, D. J. A.; Cameron, A. Collier; Anderson, D. R.; Enoch, B.; Hellier, C.; Maxted, P. F. L.; Miller, G. R. M.; Pollacco, D.; Queloz, D.; Simpson, E.; Smalley, B.; Triaud, A. H. M. J.; Boisse, I.; Bouchy, F.; Gillon, M.; Hébrard, G. (2012). "Rossiter-Mc Laughlin effect measurements for WASP-16, WASP-25 and WASP-31★". Monthly Notices of the Royal Astronomical Society. 423 (2): 1503–1520. arXiv:1203.4971. Bibcode:2012MNRAS.423.1503B. doi:10.1111/j.1365-2966.2012.20973.x.
- 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.
- Planet WASP-25 b at exoplanet.eu
- Southworth, John; Hinse, T. C.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Galianni, P.; Gerner, T.; Giannini, E.; Gu, S.-H.; Hundertmark, M.; Jørgensen, U. G.; Juncher, D.; Kerins, E.; Mancini, L.; Rabus, M.; Ricci, D.; Schäfer, S.; Skottfelt, J.; Tregloan-Reed, J.; Wang, X.-B.; Wertz, O.; Alsubai, K. A.; Andersen, J. M.; Bozza, V.; Bramich, D. M.; Browne, P.; Ciceri, S.; d'Ago, G.; Damerdji, Y.; et al. (2014). "High-precision photometry by telescope defocussing – VI. WASP-24, WASP-25 and WASP-26★". Monthly Notices of the Royal Astronomical Society. 444 (1): 776–789. arXiv:1407.6253. Bibcode:2014MNRAS.444..776S. doi:10.1093/mnras/stu1492.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.