Kepler-25

Kepler-25

Observation data Epoch J2000       Equinox J2000
Constellation	Lyra [1]
Right ascension	19h 06m 33.2141s [2]
Declination	+39° 29′ 16.359″ [2]
Apparent magnitude  (V)	10.623±0.053 [3]
Characteristics
Spectral type	F [4]
Apparent magnitude  (B)	11.337±0.016 [3]
Variable type	Planetary transit variable
Astrometry
Proper motion (μ)	RA: −0.303(14) mas/yr [2] Dec.: 6.109(13) mas/yr [2]
Parallax (π)	4.1456±0.0113  mas [2]
Distance	787 ± 2  ly (241.2 ± 0.7  pc)
Details
Mass	1.159+0.040 −0.051 [5]   M☉
Radius	1.297±0.015 [5]   R☉
Luminosity	2.406+0.126 −0.128 [5]   L☉
Surface gravity (log g)	4.275+0.007 −0.008 [5]   cgs
Temperature	6270±79 [6]   K
Metallicity [Fe/H]	−0.05±0.10 [6]   dex
Rotation	23.147±0.039 days [7]
Rotational velocity (v sin i)	9.5 [8]  km/s
Age	3.45+0.81 −0.72 [5]   Gyr
Other designations
Gaia DR2 2100451630105041152, KOI-244, KIC 4349452, TYC 3124-1264-1, 2MASS J19063321+3929164 [9]
Database references
SIMBAD	data
KIC	data

Kepler-25 is a star in the northern constellation of Lyra. ^[1] It is slightly larger and more massive than the Sun, with a luminosity 21⁄2 times that of the Sun. ^[5] With an apparent visual magnitude of 10.6, ^[3] this star is too faint to be seen with the naked eye.

Planetary system

In 2011, two candidate planets were found transiting this star by the Kepler space telescope. ^[10] These planets are very close to yet not lie in the 1:2 orbital resonance to each other, indicating the absence of other planetary objects in the inner part of the planetary systems. ^[11] These planets were confirmed through transit-timing variation method. ^[12] A third planet was discovered through follow-up radial velocity measurements and was confirmed in January 2014. ^[8]

The plane of planetary orbits is well aligned with the equatorial plane of the star, misalignment angle equal to 7±8° ^[13]

The Kepler-25 planetary system ^{[14] [4]}

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	8.7+2.5 −2.3  M🜨	0.068	6.238297±0.000017	0.0029+0.0023 −0.0017	92.827+0.084 −0.083 °	2.748+0.038 −0.035  R🜨
c	15.2+1.3 −1.6  M🜨	0.11	12.7207±0.0001	0.0061+0.0049 −0.0041	92.764+0.042 −0.039 °	5.217+0.070 −0.065  R🜨
d	71.9±9.8  M🜨	—	122.4+0.0 −0.7	0.13+0.13 −0.09	—	—

References

1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
2. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
3. Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H. Vizier catalog entry
4. Schneider, Jean, "Star: Kepler-25", Extrasolar Planets Encyclopaedia , archived from the original on 2012-06-16, retrieved 2013-12-18
5. Silva Aguirre, V.; et al. (2015). "Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology". Monthly Notices of the Royal Astronomical Society. 452 (2): 2127–2148. arXiv: 1504.07992 . Bibcode: 2015MNRAS.452.2127S . doi: 10.1093/mnras/stv1388 .
6. Huber, Daniel; et al. (2013). "Fundamental Properties of Kepler Planet-candidate Host Stars using Asteroseismology". The Astrophysical Journal. 767 (2). 127. arXiv: 1302.2624 . Bibcode: 2013ApJ...767..127H . doi: 10.1088/0004-637X/767/2/127 .
7. McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv: 1308.1845 . Bibcode: 2013ApJ...775L..11M . doi: 10.1088/2041-8205/775/1/L11 .
8. Marcy, Geoffrey W.; et al. (2014). "Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets". The Astrophysical Journal Supplement Series. 210 (2). 20. arXiv: 1401.4195 . Bibcode: 2014ApJS..210...20M . doi: 10.1088/0067-0049/210/2/20 .
9. "Kepler-25". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-10-02.
10. 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 .
11. Migaszewski, Cezary; Gozdziewski, Krzysztof (2018), "A periodic configuration of the Kepler-25 planetary system?", Monthly Notices of the Royal Astronomical Society, 480 (2): 1767–1777, arXiv: 1803.10285 , doi: 10.1093/mnras/sty1972 , S2CID   55395774
12. Steffen, Jason H.; et al. (2012). "Transit timing observations from Kepler - III. Confirmation of four multiple planet systems by a Fourier-domain study of anticorrelated transit timing variations". Monthly Notices of the Royal Astronomical Society. 421 (3): 2342–2354. arXiv: 1201.5412 . Bibcode: 2012MNRAS.421.2342S . doi: 10.1111/j.1365-2966.2012.20467.x .
13. Albrecht, Simon; Winn, Joshua N.; Marcy, Geoffrey W.; Howard, Andrew W.; Isaacson, Howard; Johnson, John A. (2013), "Low Stellar Obliquities in Compact Multiplanet Systems", The Astrophysical Journal, 771 (1): 11, arXiv: 1302.4443 , Bibcode:2013ApJ...771...11A, doi:10.1088/0004-637X/771/1/11, S2CID   17247029
14. Mills, Sean M.; et al. (2019). "Long-period Giant Companions to Three Compact, Multiplanet Systems". The Astronomical Journal. 157 (4). 145. arXiv: 1903.07186 . Bibcode: 2019AJ....157..145M . doi: 10.3847/1538-3881/ab0899 .