DP Leonis - Misplaced Pages

(Redirected from DP Leonis b) Star system in the constellation Leo

DP Leonis
Observation data Epoch J2000.0 Equinox J2000.0
A white-light light curve for DP Leonis, adapted from Beuermann et al. (2014)
Constellation	Leo
Right ascension	11 17 15.92381
Declination	+17° 57′ 41.6804″
Apparent magnitude (V)	17.5-19
Characteristics
Variable type	AM Her
Astrometry

Radial velocity (R_v)	0.0 km/s
Proper motion (μ)	RA: −28.700 mas/yr Dec.: −1.444 mas/yr
Parallax (π)	3.2781 ± 0.3110 mas
Distance	990 ± 90 ly (310 ± 30 pc)

Orbit
Period (P)	0.0623628426 yr
Eccentricity (e)	0.0 (fixed)
Inclination (i)	79.5°
Details
White dwarf
Mass	0.6 `M`_☉
Temperature	13,500 K
Donor star
Mass	0.09 `M`_☉
Other designations
DP Leo, X 11146+182
Database references
SIMBAD	data
Exoplanet Archive	data

DP Leonis (abbreviated DP Leo) is a binary star system in the equatorial constellation of Leo. It is a variable star that ranges in apparent visual magnitude from 17.5 down to 19. The system is located at a distance of approximately 990 light-years from the Sun based on parallax. It is a cataclysmic variable star of the AM Herculis-type also known as polars. The system comprises an eclipsing white dwarf and red dwarf in tight orbit (nearly 1.5 hours) and an extrasolar planet. This eclipsing variable was discovered by P. Biermann and associates in 1982 as the optical counterpart to the EINSTEIN X-ray source E1114+182.

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. The object is roughly 6 times more massive than Jupiter and is located 8.6 AU from the binary.

The DP Leonis planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (years)	Eccentricity	Inclination	Radius
b	≥6.1 ± 0.5 M_J	8.2 ± 0.4	28.0 ± 2.0	0.39 ± 0.13	—	—

References

Beuermann, K.; Dreizler, S.; Hessman, F. V.; Schwope, A. D. (February 2014). "Evidence for an oscillation of the magnetic axis of the white dwarf in the polar DP Leonis". Astronomy and Astrophysics. 562: A63. arXiv:1401.1638. Bibcode:2014A&A...562A..63B. doi:10.1051/0004-6361/201323192. S2CID 118631556.
^ 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.
^ Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869. Retrieved 2021-11-30.
Duflot, M.; et al. (December 1995). "Radial velocities: The Wilson-Evans-Batten catalogue". Astronomy and Astrophysics Supplement. 114: 269. Bibcode:1995A&AS..114..269D.
^ Beuermann, K.; et al. (February 2011). "The giant planet orbiting the cataclysmic binary DP Leonis". Astronomy and Astrophysics. 526: 5. arXiv:1011.3905. Bibcode:2011A&A...526A..53B. doi:10.1051/0004-6361/201015942. S2CID 119184531. A53.
^ Schwope, A. D.; et al. (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. S2CID 17284811.
"DP Leo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-25.
Qian, S.-B.; et al. (2010). "Detection of a Giant Extrasolar Planet Orbiting the Eclipsing Polar DP Leo". The Astrophysical Journal Letters. 708 (1): L66 – L68. Bibcode:2010ApJ...708L..66Q. doi:10.1088/2041-8205/708/1/L66.
Biermann, P.; et al. (June 1985). "The new eclipsing magnetic binary system E 1114+182". Astrophysical Journal. 293: 303–320. Bibcode:1985ApJ...293..303B. doi:10.1086/163238.

Constellation of Leo

Stars

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
Flamsteed	3 6 (h) 7 8 9 10 11 12 13 15 (f) 18 19 20 21 22 (g) 23 26 31 (A) 33 34 35 37 39 40 42 43 44 45 46 48 49 50 51 (m) 52 (k) 53 (l) 54 55 56 57 58 (d) 59 (c) 60 (b) 61 (p) 62 (p) 64 65 (p) 66 67 69 (p) 71 72 73 (n) 75 76 79 80 81 82 83 85 86 87 (e) 88 89 90 92 93 95 (o) 6 LMi 18 LMi 49 LMi 52 LMi
Variable	R AD CN CW DP EE
HR	4253 (p) 4459 (Formosa)
HD	81040 88133 89307 96063 (Dingolay) 97658 99109 (Shama) 100777 (Sagarmatha) 102272
Other	BD+20 2457 Gliese 408 Gliese 436 (Noquisi) GJ 3685 HVS 7 K2-3 K2-18 2MASSI J0937347+293142 2MASS J10475385+2124234 MACS J1149 Lensed Star 1 PSR B0943+10 PSR B0950+08 SDSS J102915+172927

Exoplanets	γ Leonis b μ Leonis b υ Leonis b DP Leonis b Gliese 436 b (Awohali) HD 81040 b HD 88133 b HD 89307 b HD 89345 b HD 96063 b (Ramajay) HD 99109 b (Perwana) HD 100777 b (Laligurans) HD 102272 b c K2-18b c

Galaxies

Messier	65 66 95 96 105
NGC	2903 2906 2911 2964 3041 3048 3049 3177 3185 3187 3190 3193 3226 3227 3239 3274 3301 3357 3362 3367 3370 3377 3384 3412 3426 3447 3455 3489 3501 3506 3521 3524 3535 3593 3596 3598 3599 3602 3605 3607 3608 3628 3632 3640 3646 3647 3664 3666 3678 3686 3697 3705 3710 3758 3799 3800 3801 3805 3806 3810 3816 3821 3837 3840 3841 3842 3844 3845 3851 3857 3859 3860 3861 3862 3864 3867 3868 3873 3875 3883 3884 3886 3900 3902 3908 3925 3937 3947 3954 4005
Numbered	I II III IV V
Other	Cosmic Horseshoe IC 2498 IC 2628 IRAS 10565+2448 J1000+1242 Leo P Leo T PSO J172.3556+18.7734 UGC 6614 UGC 6697

Planetary system

See also

References