KIC 11026764
KIC 11026764, nicknamed "Gemma" by Li et al.,[3] is a G-type main sequence star whose characteristics have been extensively measured by the Kepler spacecraft because of its similarity to the Sun. Its diameter is 2.18 times the Sun and is aged at 5.94 billion years, slightly older than the Sun.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 21m 24.62539s[1] |
| Declination | +48° 30′ 53.3184″[1] |
| Apparent magnitude (V) | 9.71[2] |
| Characteristics | |
| Evolutionary stage | subgiant star[3] |
| Spectral type | G1[4] |
| Astrometry | |
| Radial velocity (Rv) | −21.85±0.42[1] km/s |
| Proper motion (μ) | RA: 48.904±0.126 mas/yr[1] Dec.: 0.570±0.140 mas/yr[1] |
| Parallax (π) | 5.7752 ± 0.0942 mas[1] |
| Distance | 565 ± 9 ly (173 ± 3 pc) |
| Details[5] | |
| Mass | 1.18±0.08[6] M☉ |
| Radius | 2.18 ± 0.05 R☉ |
| Luminosity | 3.56 ± 0.14 L☉ |
| Surface gravity (log g) | 3.884±0.009 cgs |
| Temperature | 5636±80[3] K |
| Metallicity [Fe/H] | 0.04[6] dex |
| Rotational velocity (v sin i) | 2.6[2] km/s |
| Age | 5.69±0.68[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star exhibits a weak quasi-periodic pulsations with frequency around 0.0009 Hz.[3]
References
- Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- "KIC 11026764". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 November 2016.
- Li, Yaguang; Bedding, Timothy R.; Li, Tanda; Bi, Shaolan; Stello, Dennis; Zhou, Yixiao; White, Timothy R. (2020), "Asteroseismology of 36 Kepler subgiants – I. Oscillation frequencies, linewidths, and amplitudes", Monthly Notices of the Royal Astronomical Society, 495 (2): 2363–2386, arXiv:2005.06460, doi:10.1093/mnras/staa1335
- Molenda-Żakowicz, J.; Sousa, S. G.; Frasca, A.; Uytterhoeven, K.; Briquet, M.; Van Winckel, H.; Drobek, D.; Niemczura, E.; Lampens, P.; Lykke, J.; Bloemen, S.; Gameiro, J. F.; Jean, C.; Volpi, D.; Gorlova, N.; Mortier, A.; Tsantaki, M.; Raskin, G. (2013). "Atmospheric parameters of 169 F-, G-, K- and M-type stars in the Kepler field". Monthly Notices of the Royal Astronomical Society. 434 (2): 1422. arXiv:1306.6011. Bibcode:2013MNRAS.434.1422M. doi:10.1093/mnras/stt1095. S2CID 59269553.
- Metcalfe, T. S.; Monteiro, M. J. P. F. G.; Thompson, M. J.; Molenda-Żakowicz, J.; Appourchaux, T.; Chaplin, W. J.; Doğan, G.; Eggenberger, P.; Bedding, T. R.; Bruntt, H.; Creevey, O. L.; Quirion, P.-O.; Stello, D.; Bonanno, A.; Silva Aguirre, V.; Basu, S.; Esch, L.; Gai, N.; Di Mauro, M. P.; Kosovichev, A. G.; Kitiashvili, I. N.; Suárez, J. C.; Moya, A.; Piau, L.; García, R. A.; Marques, J. P.; Frasca, A.; Biazzo, K.; Sousa, S. G.; et al. (2010). "A Precise Asteroseismic Age and Radius for the Evolved Sun-Like Star Kic 11026764". The Astrophysical Journal. 723 (2): 1583–1598. arXiv:1010.4329. Bibcode:2010ApJ...723.1583M. doi:10.1088/0004-637X/723/2/1583. S2CID 56123879.
- Li, Tanda; Bedding, Timothy R.; Christensen-Dalsgaard, Jørgen; Stello, Dennis; Li, Yaguang; Keen, Matthew A. (2020), "Asteroseismology of 36 Kepler subgiants – II. Determining ages from detailed modelling", Monthly Notices of the Royal Astronomical Society, 495 (3): 3431–3462, arXiv:2006.00901, doi:10.1093/mnras/staa1350
Further reading
- Metcalfe, Travis S.; Kepler Asteroseismic Science Consortium (January 2011). "The Asteroseismic Age and Radius of the Solar-type Subgiant KIC 11026764 from Kepler Photometry". Bulletin of the American Astronomical Society. 43. Bibcode:2011AAS...21720108M.
- Mathur, S. (August 3, 2013). Study of stellar magnetic activity with CoRoT and Kepler data. Fujihara Seminar held 25-29 November, 2012, in Hakone, Japan. Progress in Physics of the Sun and Stars: A New Era in Helio- and Asteroseismology. arXiv:1308.0645. Bibcode:2013ASPC..479..425M.
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