Astronomy:Qatar 1
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Draco |
| Right ascension | 20h 13m 31.6176s |
| Declination | 65° 09′ 43.4909″ |
| Apparent magnitude (V) | 12.84 |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | K3V |
| B−V color index | 1.06 |
| V−R color index | 0.19 |
| J−H color index | 0.472 |
| J−K color index | 0.590 |
| Astrometry | |
| Radial velocity (Rv) | -37.835±0.063 km/s |
| Proper motion (μ) | RA: 12.636±0.048 mas/yr Dec.: 58.170±0.041 mas/yr |
| Parallax (π) | 5.3587 ± 0.0231 mas |
| Distance | 609 ± 3 ly (186.6 ± 0.8 pc) |
| Details[1][2] | |
| Mass | 0.85±0.03 M☉ |
| Radius | 0.823±0.025 R☉ |
| Surface gravity (log g) | 4.536±0.024 cgs |
| Temperature | 4861±125 K |
| Metallicity [Fe/H] | 0.2±0.1 dex |
| Rotational velocity (v sin i) | 1.7±0.3 km/s |
| Age | 4.5 Gyr |
| Other designations | |
Qatar-1, 2MASS J20133160+6509433, Gaia DR2 2244830490514284928[3] | |
| Database references | |
| SIMBAD | 1 data |
Qatar 1 is a orange main sequence star in the constellation of Draco.
Star characteristics
Qatar 1 has an average to high metallicity of 160% of solar,[1], and is of similar age to Sun.[2] The star has significant starspot activity.[4]
Planetary system
The "Hot Jupiter" class planet Qatar-1 b was discovered around Qatar 1 in 2010.[1]. The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on the Rossiter-McLaughlin effect equal to −8.4±7.1 degrees.[2]. The planet's measured temperature is 1532±219 K.[5] Spectroscopic study in 2017 do suggest Qatar-1 b has relatively clear skies with a few clouds.[6]
Additional planets or brown dwarf in system were suspected in 2013,[7] but were refuted in 2015.[8][9]
The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.33±0.05 MJ | 0.02343±0.0012 | 1.42002368±0.00000015 | 0.020+0.011−0.01 | 84.23±0.06° | 1.19±0.09 RJ |
References
- ↑ 1.0 1.1 1.2 1.3 Alsubai, K. A.; Parley, N. R.; Bramich, D. M.; West, R. G.; Sorensen, P. M.; Collier Cameron, A.; Latham, D. W.; Horne, K. et al. (2011). "Qatar-1b: A hot Jupiter orbiting a metal-rich K dwarf star". Monthly Notices of the Royal Astronomical Society 417 (1): 709–716. doi:10.1111/j.1365-2966.2011.19316.x. Bibcode: 2011MNRAS.417..709A.
- ↑ 2.0 2.1 2.2 2.3 Covino, E.; Esposito, M.; Barbieri, M.; Mancini, L.; Nascimbeni, V.; Claudi, R.; Desidera, S.; Gratton, R. et al. (2013). "The GAPS programme with HARPS-N at TNG". Astronomy & Astrophysics 554: A28. doi:10.1051/0004-6361/201321298.
- ↑ Qatar 1 -- High proper-motion Star
- ↑ Mislis, D.; Mancini, L.; Tregloan-Reed, J.; Ciceri, S.; Southworth, J.; d'Ago, G.; Bruni, I.; Baştürk, Ö. et al. (2015). "High-precision multiband time series photometry of exoplanets Qatar-1b and TrES-5b". Monthly Notices of the Royal Astronomical Society 448 (3): 2617–2623. doi:10.1093/mnras/stv197. Bibcode: 2015MNRAS.448.2617M.
- ↑ Garhart, Emily; Deming, Drake; Mandell, Avi; Knutson, Heather A.; Wallack, Nicole; Burrows, Adam; Fortney, Jonathan J.; Hood, Callie et al. (2020). "Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer's Secondary Eclipses". The Astronomical Journal 159 (4): 137. doi:10.3847/1538-3881/ab6cff. Bibcode: 2020AJ....159..137G.
- ↑ von Essen, C.; Cellone, S.; Mallonn, M.; Albrecht, S.; Miculán, R.; Müller, H. M. (2017). "Testing connections between exo-atmospheres and their host stars". Astronomy & Astrophysics 603: A20. doi:10.1051/0004-6361/201730506.
- ↑ von Essen, C.; Schröter, S.; Agol, E.; Schmitt, J. H. M. M. (2013). "Qatar-1: Indications for possible transit timing variations". Astronomy & Astrophysics 555: A92. doi:10.1051/0004-6361/201321407. Bibcode: 2013A&A...555A..92V.
- ↑ MacIejewski, G.; Fernández, M.; Aceituno, F. J.; Ohlert, J.; Puchalski, D.; Dimitrov, D.; Seeliger, M.; Kitze, M. et al. (2015). "No variations in transit times for Qatar-1 B". Astronomy & Astrophysics 577: A109. doi:10.1051/0004-6361/201526031. Bibcode: 2015A&A...577A.109M.
- ↑ Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2015). "Transit Timing Variation Measurements of WASP-12b and Qatar-1b: No Evidence for Additional Planets". arXiv:1512.00464 [astro-ph.EP].
- ↑ 10.0 10.1 Investigating Extra-solar Planetary System Qatar-1 through Transit Observations, 2020
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