DP Leonis

DP Leonis
DP Leonis
DP Leo and Planet.png

Artist's rendering of DP Leo and its planetary companion
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo
Right ascension 11h 17m 16.00s[1]
Declination +17° 57′ 41.1″[1]
Apparent magnitude (V) 17.5-19[2]
Characteristics
Spectral type DA / M5V?
Variable type XM[2]
Astrometry
Radial velocity (Rv) 0 km/s
Distance 1304 ly
(400[3] pc)
Absolute magnitude (MV) 9.5-11
Details
Mass 0.6/0.09 [4] M☉
Radius 0.0114[4]/0.12? R☉
Luminosity 0.00449/0.00105? L☉
Temperature 13,500/3000? K
Orbit
Period (P) 0.0001708 yr
Semimajor axis (a) 0.0027 AU"
Eccentricity (e) 0.0
Inclination (i) 79.5[4]°
Other designations
V* DP Leo, X 11146+182[2]
Database references
SIMBAD data
NStED data
Extrasolar Planets
Encyclopaedia		 data

DP Leonis (abbreviated DP Leo) is an eclipsing binary system approximately 1304 light-years away from the Sun,[4] probably a cataclysmic variable star of the AM Herculis-type also known as polars. The system comprises an eclipsing white dwarf star and red dwarf star in tight orbit (nearly 1.5 hours) and an extrasolar planet.[3]

Planetary system

In 2010, Qian et al. announced the detection of a third body of planetary mass around the eclipsing binary system. The presence of a third body had already been suspected in 2002.[4] The object is roughly 6 times more massive than Jupiter and is located 8.6 AU from the binary.

The DP Leonis system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity
b ≥6.28 MJ 8.6 23.8  ?

References

  1. ^ a b "V* DP Leo -- Cataclysmic Var. AM Her type". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=DP+Leo. Retrieved 2009-12-16. 
  2. ^ a b c "Query= DP Leo". General Catalogue of Variable Stars. Centre de Données astronomiques de Strasbourg. http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=DP+Leo. Retrieved 2009-12-16. 
  3. ^ a b c Qianet al.; Liao, W.-P.; Zhu, L.-Y.; Dai, Z.-B. (2010). "DETECTION OF A GIANT EXTRASOLAR PLANET ORBITING THE ECLIPSING POLAR DP LEO". The Astrophysical Journal 708 (1): 66–68. Bibcode 2010ApJ...708L..66Q. doi:10.1088/2041-8205/708/1/L66. http://www.iop.org/EJ/abstract/2041-8205/708/1/L66. 
  4. ^ a b c d e Schwope et al.; Hambaryan, V.; Schwarz, R.; Kanbach, G.; G�Nsicke, B. T. (2002). "A multiwavelength timing analysis of the eclipsing polar DP Leo". Astronomy and Astrophysics 392 (2): 541–551. arXiv:astro-ph/0111457. Bibcode 2002A&A...392..541S. doi:10.1051/0004-6361:20011651. 

See also

Coordinates: Sky map 11h 17m 16.00s, +17° 57′ 41.1″

v · Leo
Bayer
α (Regulus) • β (Denebola) • γ (Algieba) • δ (Zosma) • ε (Algenubi) • ζ (Adhafera) • η • θ (Chertan) • ι • κ (Al Minliar al Asad) • λ (Alterf) • μ (Rasalas) • ν • ξ • ο (Subra) • π • ρ • σ • τ • υ • φ • χ • ψ • ω • b • c • d • e • f • g • h • k • l • m • n • o • p¹ • p² • p³ • A
Flamsteed
1 (κ, Al Minliar al Asad) • 2 (ω) • 3 • 4 (λ, Alterf) • 5 (ξ) • 6 (h) • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 (ο, Subra) • 15 (f) • 16 (ψ) • 17 (ε, Algenubi) • 18 • 19 • 20 • 21 • 22 (g) • 23 • 24 (μ, Rasalas) • 27 (ν) • 29 (π) • 30 (η) • 31 (A) • 32 (α, Regulus) • 34 • 35 • 36 (ζ, Adhafera) • 37 • 39 • 40 • 41 (γ, Algieba) • 42 • 43 • 44 • 45 • 46 • 47 (ρ) • 48 • 49 • 50 • 51 (m) • 52 (k) • 53 (l) • 54 • 55 • 56 • 58 (d) • 59 (c) • 60 (b) • 61 (p²) • 62 (p³) • 63 (χ) • 64 • 67 • 68 (δ, Zosma) • 70 (θ, Chertan) • 71 • 72 • 73 (n) • 74 (φ) • 75 • 76 • 77 (σ) • 78 (ι) • 79 • 80 • 81 • 83 • 84 (τ) • 85 • 86 • 87 (e) • 88 • 89 • 90 • υ (91) • 92 • 93 • 94 (β, Denebola) • 95 • 18 LMi • 37 Sex • 52 LMi
Nearby
Wolf 359 • AD • 2MASS 0937+2931 • Gliese 408 • EE • Gliese 436
Other
R • CW • DP
List


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