HD 10647

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HD 10647
Diagram showing star positions and boundaries of the Eridanus constellation and its surroundings
Cercle rouge 100%.svg

A star chart of the Eridanus constellation showing the position of HD 10647 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Eridanus
Right ascension 1h 42m 29.32s[1]
Declination –53° 44′ 27.0″[1]
Apparent magnitude (V) 5.52[2]
Characteristics
Spectral type F9V[3]
B−V color index 0.551[2]
Astrometry
Radial velocity (Rv) 12.9 km/s
Proper motion (μ) RA: +166.32 ± 0.24[1] mas/yr
Dec.: –106.52 ± 0.27[1] mas/yr
Parallax (π) 57.36 ± 0.25[1] mas
Distance 56.9 ± 0.2 ly
(17.43 ± 0.08 pc)
Absolute magnitude (MV) 4.32
Details
Mass 1.11 ± 0.02[3] M
Radius 1.10 ± 0.02[3] R
Luminosity 1.41[3] L
Temperature 6218 ± 20[3] K
Metallicity [Fe/H] 0.00 ± 0.01[3] dex
Rotation 10 ± 3[3]
Rotational velocity (v sin i) 4.9[3] km/s
Age 1.4 ± 0.9[3] Gyr
Other designations
q1 Eridani, 5 G. Eridani, GJ 3109, HR 506, HIP 7978
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia
data

HD 10647 (q1 Eridani) is a 6th-magnitude yellow-white dwarf star, 57 light-years away in the constellation of Eridanus. The star is visible to the unaided eye under very dark skies. It is slightly hotter and more luminous than the Sun, and at 1,750 million years old, it is also younger. An extrasolar planet was discovered orbiting this star in 2003.

Planetary system[edit]

In 2003, Michel Mayor's team announced the discovery of a new planet, HD 10647 b, in Paris at the XIX IAP Colloquium Extrasolar Planets: Today & Tormorrow* [1]. The Anglo-Australian Planet Search team initially did not detect the planet in 2004,[4] though a solution was made by 2006.[5] The CORALIE data was finally published in 2013.[3]

The IRAS infrared space telescope detected an excess of infrared radiation from the star, indicating a possible circumstellar disk.[6] Using this data and later observations with the Spitzer Space Telescope, Infrared Space Observatory and the Atacama Pathfinder Experiment implies that the disk is located at 25 Astronomical units and has a thin (0.02 AU), ring-like structure, with the sharp cutoff in the disk suggesting a planet.[7] Additionally, a much longer wavelength suggests the existence of a much wider belt of material, analogous to the Kuiper belt. The hierarchy of this system is somewhat reminiscent of that of Epsilon Eridani, without an inner asteroid belt.

The HD 10647 system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >0.94 ± 0.08 MJ 2.015 ± 0.011 989.2 ± 8.1 0.15 ± 0.08
Dust disk 25 AU
Dust disk 270–330 AU

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b Decin, G. et al. (November 2003), "Age Dependence of the Vega Phenomenon: Observations", The Astrophysical Journal 598 (1): 636–644, arXiv:astro-ph/0308294, Bibcode:2003ApJ...598..636D, doi:10.1086/378800 
  3. ^ a b c d e f g h i j k Marmier, M. et al. (2013). "The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets". Astronomy and Astrophysics 551. A90. arXiv:1211.6444. Bibcode:2013A&A...551A..90M. doi:10.1051/0004-6361/201219639. 
  4. ^ Jones, H. R. A.; et al. (2004). HD10647 and the Distribution of Exoplanet Properties with Semi-major Axis. Bibcode:2004ASPC..321..298J. 
  5. ^ Butler, R. P. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. 
  6. ^ Stencel and Backman; Backman, Dana E. (1991). "A survey for infrared excesses among high galactic latitude SAO stars". The Astrophysical Journal Supplement Series 75: 905–924. Bibcode:1991ApJS...75..905S. doi:10.1086/191553. 
  7. ^ Liseau et al. (2008). "q1 Eridani: a solar-type star with a planet and a dust belt". Astronomy and Astrophysics Letters 480 (3): L47–L50. arXiv:0803.1294. Bibcode:2008A&A...480L..47L. doi:10.1051/0004-6361:20079276. 

External links[edit]

Coordinates: Sky map 01h 42m 29.32s, −53° 44′ 27.00″