Kepler-13
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 07m 53.1397s[2] |
| Declination | 46° 52′ 05.931″[2] |
| Apparent magnitude (V) | 9.95[3] (KOI-13A=10.33[4]) |
| Characteristics | |
| Spectral type | A0 |
| Astrometry | |
| Proper motion (μ) | RA: −4.401±0.187[2] mas/yr Dec.: −15.780±0.237[2] mas/yr |
| Parallax (π) | 1.9053 ± 0.1051 mas[2] |
| Distance | 1,710 ± 90 ly (520 ± 30 pc) |
| Details[5] | |
| Kepler-13A | |
| Mass | 1.72±0.10 M☉ |
| Radius | 1.71±0.04 R☉ |
| Surface gravity (log g) | 4.2±0.5 cgs |
| Temperature | 7650±250 K |
| Metallicity [Fe/H] | 0.2±0.2 dex |
| Rotational velocity (v sin i) | 78±15 km/s |
| Age | 0.5±0.1 Gyr |
| Kepler-13B | |
| Mass | 1.68±0.10 M☉ |
| Radius | 1.68±0.04 R☉ |
| Surface gravity (log g) | 4.2±0.5 cgs |
| Temperature | 7530±250 K |
| Metallicity [Fe/H] | 0.2±0.2 dex |
| Rotational velocity (v sin i) | 69±13 km/s |
| Age | 0.5±0.1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Kepler-13 or KOI-13 is a stellar triple star system consisting of Kepler-13A, around which an orbiting hot Jupiter exoplanet was discovered with the Kepler spacecraft in 2011, and Kepler-13B a common proper motion companion star which has an additional star orbiting it.[6]
Stellar system
The multiple nature of the system was discovered in 1904 by Robert Grant Aitken at Lick Observatory. He measured a separation between the A and B components of approximately one arc second and position angle of 281.3° with the 36" James Lick telescope.[7] The position of the two visual components of the system relative to each other has remained constant since 1904.[8] Radial velocity measurements taken with the SOPHIE échelle spectrograph at the Haute-Provence Observatory revealed an additional companion orbiting Kepler-13B. This companion has a mass of between 0.4 and 1 times that of the Sun and orbits with a period of 65.831 days with an eccentricity of 0.52[6]
Planetary system
Kepler-13 was identified as one of 1235 planetary candidates with transit-like signatures in the first four months of Kepler data.[9] It was confirmed as a planet by measuring the Doppler beaming effect on the Kepler light curve.[10] The planet that has been confirmed, having a radius of between 1.5 and 2.6 RJ, is also one of the largest known exoplanets.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 9.28±0.16 MJ | 0.03641±0.00087 | 1.763588±0.000001 | 0.00064+0.00012 −0.00016 |
86.770+0.048 −0.052° |
2.216±0.087 RJ |
References
- ^ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
- ^ a b c d e 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. Gaia DR2 record for this source at VizieR.
- ^ a b "Kepler-13". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-07.
- ^ Howarth, Ian D.; Morello, Giuseppe (2017). "Rapid rotators revisited: Absolute dimensions of KOI-13". Monthly Notices of the Royal Astronomical Society. 470 (1): 932–939. arXiv:1705.07302. Bibcode:2017MNRAS.470..932H. doi:10.1093/mnras/stx1260.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Shporer, Avi; et al. (2014). "Atmospheric Characterization of the Hot Jupiter Kepler-13Ab". The Astrophysical Journal. 788 (1). 92. arXiv:1403.6831. Bibcode:2014ApJ...788...92S. doi:10.1088/0004-637X/788/1/92.
- ^ a b Santerne, A.; et al. (2012). "SOPHIE velocimetry of Kepler transit candidates. VI. An additional companion in the KOI-13 system". Astronomy and Astrophysics. 544. L12. arXiv:1207.1715. Bibcode:2012A&A...544L..12S. doi:10.1051/0004-6361/201219899.
- ^ Aitken, Robert Grant (1904). "Measures of one hundred fifty-five new double stars". Lick Observatory Bulletin. 3: 6–18. Bibcode:1904LicOB...3....6A. doi:10.5479/ADS/bib/1904LicOB.3.6A.
- ^ Szabó, Gy. M.; et al. (2011). "Asymmetric Transit Curves As Indication of Orbital Obliquity: Clues from the Late-Type Dwarf Companion in Koi-13". The Astrophysical Journal Letters. 736 (1). L4. arXiv:1105.2524. Bibcode:2011ApJ...736L...4S. doi:10.1088/2041-8205/736/1/L4.
- ^ Borucki, William J.; et al. (2011). "Characteristics of Planetary Candidates Observed by Kepler. II. Analysis of the First Four Months of Data". The Astrophysical Journal. 736 (1). 19. arXiv:1102.0541. Bibcode:2011ApJ...736...19B. doi:10.1088/0004-637X/736/1/19.
- ^ Shporer, Avi; et al. (2011). "Detection of Koi-13.01 Using the Photometric Orbit". The Astronomical Journal. 142 (6). 195. arXiv:1110.3510. Bibcode:2011AJ....142..195S. doi:10.1088/0004-6256/142/6/195.
- ^ Esteves, Lisa J.; Mooij, Ernst J. W. De; Jayawardhana, Ray (2015). "Changing Phases of Alien Worlds: Probing Atmospheres Of Kepler planets with High-Precision Photometry". The Astrophysical Journal. 804 (2). 150. arXiv:1407.2245. Bibcode:2015ApJ...804..150E. doi:10.1088/0004-637X/804/2/150.
