HD 107146

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HD 107146

False colour image of HD 107146 taken by the Hubble Space Telescope, showing its circumstellar disc. The right side of the disc is brighter—this is thought to be because it is closer to the Earth.
Observation data
Epoch J2000.0[1]
Constellation
(pronunciation)		 Coma Berenices[2]
Right ascension 12h 19m 06.5015s[1]
Declination 16° 32′ 53.869″[1]
Apparent magnitude (V) 7.07[1]
Characteristics
Spectral type G2V[1]
Astrometry
Radial velocity (Rv) 6.2[1] km/s
Proper motion (μ) RA: -175.65[1] mas/yr
Dec.: -148.28[1] mas/yr
Parallax (π) 35.07[1] ± 0.88[1] mas
Distance 92.96[3] ly (28.5[3] pc)
Details
Luminosity 1.1[4] L☉
Age 80 - 200 myr[3] years
Other designations
NLTT 30317, GSC 01445-02267, PLX 2836, SAO 100038, AG+16 1260, HD 107146, PPM 128955, SKY# 23079, AGKR 11033, HIC 60074, RBS 1096, SPOCS 527, ASCC 867033, HIP 60074, 2RE J1219+163, TYC 1445-2267-1, BD+17 2462, IRAS 12165+1649, 2RE J121906+163301, UBV M 18049, BSD 80-883, IRAS F12165+1649, RE J121908+163239, UBV 11059, GC 16796, LSPM J1219+1632, RE J1219+163, USNO-B1.0 1065-00201409, GCRV 7378, LTT 13439, RX J1219.1+1632, uvby98 100107146, GEN# +1.00107146, 2MASS J12190650+1632541, 1RXS J121906.8+163259, YZ 16 4641[1]

HD 107146 is a G2V (yellow dwarf) star, located 88 light years from Earth.[3] In 2003, astronomers recognized the excess infrared[5] and submillimeter[3] emission indicative of circumstellar dust, the first time such a debris disk phenomenon was noted around a star of similar spectral types as the Sun, though having a much younger age. In 2004 the Hubble Space Telescope detected the presence of a spatially resolved disc surrounding the star[6][4] Observations have given the age of the star at between 80 and 200 Myr.[3]

[edit] Circumstellar disc

The stars circumstellar disc has dimensions of approximately 210 x 300 AU.[3] The dusty ring is cool, with a temperature of 51 K, and has a mass of 0.10 M⊕.[3] Analysis of the debris disk in the far-infrared and submillimeter wavelengths, carried out using the Hubble Space Telescope, suggests the presence of small grains in the disk.[4] The disk appears to be slightly elongated to form an ellipse with its minor axis at a position angle of 58° ± 5°; working under the assumption that the disk is in fact circular gives it an inclination of 25° ± 5° from the plane of the sky.[4]

[edit] References

  1. ^ a b c d e f g h i j k SIMBAD Object query: HD 107146.
  2. ^ Quick Facts: Spitzer and Hubble Capture Evolving Planetary Systems. Spitzer Science Center.
  3. ^ a b c d e f g h Williams, Jonathan P.; et al. (March 2004). "Detection of Cool Dust around the G2 V Star HD 107146" 604: 414 - 419. 
  4. ^ a b c d Ardila, D. R.; et al. (2004). "A Resolved Debris Disk Around the G2 V Star HD 107146". The Astrophysical Journal 617 (Part 2): L147 - L150. doi:10.1086/427434. 
  5. ^ Metchev, Stanimir; et al. (January 2004). "Ten Micron Observations of Nearby Young Stars" (abstract). The Astrophysical Journal 600: 435 - 450. doi:10.1086/379788. 
  6. ^ Spitzer and Hubble Capture Evolving Planetary Systems. hubblesite.org (December 9, 2004).
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