HD 107146 is a star in the constellation Coma Berenices that is located about 90 light-years (28 pc) from Earth.[9] The apparent magnitude of 7.028 makes this star too faint to be seen with the unaided eye.
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Coma Berenices |
Right ascension | 12h 19m 06.50230s[1] |
Declination | 16° 32′ 53.8628″[1] |
Apparent magnitude (V) | 7.028[2] |
Characteristics | |
Spectral type | G2V[3] |
U−B color index | +0.073[2] |
B−V color index | +0.602[2] |
Astrometry | |
Radial velocity (Rv) | 1.88[4] km/s |
Proper motion (μ) | RA: -174.684[5] mas/yr Dec.: -149.0214[5] mas/yr |
Parallax (π) | 36.4038 ± 0.0230 mas[5] |
Distance | 89.59 ± 0.06 ly (27.47 ± 0.02 pc) |
Details | |
Mass | 1.09[6] M☉ |
Radius | 0.993±0.014[6] R☉ |
Luminosity | 1.1[7] L☉ |
Surface gravity (log g) | 4.56[8] cgs |
Temperature | 5850[6] K |
Metallicity [Fe/H] | 0.00[8] dex |
Rotation | 3.50±1.35 days[6] |
Age | 80–200 myr[9] years |
Other designations | |
Database references | |
SIMBAD | data |
The physical properties of this star are similar to the Sun, including the stellar classification G2V,[3] making this a solar analog.[10] The mass of this star is about 109% of the solar mass (M☉) and it has about 99% the radius of the Sun (R☉).[6] It is a young star with an age between 80 and 200 Myr.[9] The axis of rotation is estimated at 21+8
−9 degrees to the line of sight and it completes a rotation in a relatively brief 3.5 days.[6]
Circumstellar disc
editIn 2003, astronomers recognized the excess infrared[11] and submillimeter[9] emission indicative of circumstellar dust, the first time such a debris disk phenomenon was noted around a star of similar spectral types to the Sun, though having a much younger age. In 2004 the Hubble Space Telescope detected the presence of a spatially resolved disk surrounding the star.[7][12]
The star's circumstellar disc has dimensions of approximately 210 × 300 AU.[9] The dusty ring is cool, with a temperature of 51 K (−222 °C; −368 °F), and has a dust mass of 0.250±0.004 ME and nearly no gas.[13] 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.[7] 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.[7] An analysis published in 2009 suggests the possible presence of a planet at a separation of 45-75 AU,[10] in the wide gap centered at 75.4 AU[13] which may be carved by the planet, but no planet with mass exceeding 1-2 MJ was observed in the gap.[14]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
Debris disk | 46.6–135.6 AU | 19.3±1.0° | — |
Gallery
edit-
Transit of Vermin Galaxy behind HD 107146.[15]
References
edit- ^ a b van Leeuwen, F. (November 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. S2CID 18759600.
- ^ a b c Landolt, A. U. (June 1983), "UBVRI photometry of stars useful for checking equipment orientation stability", Astronomical Journal, 88: 853–866, Bibcode:1983AJ.....88..853L, doi:10.1086/113372
- ^ a b c "HD 107146". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2011-12-14.
- ^ White, Russel J.; et al. (June 2007), "High-dispersion optical spectra of nearby stars younger than the Sun", The Astronomical Journal, 133 (6): 2524–2536, arXiv:0706.0542, Bibcode:2007AJ....133.2524W, doi:10.1086/514336, S2CID 122854
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e f Watson, C. A.; et al. (May 2011). "On the alignment of debris discs and their host stars' rotation axis - implications for spin-orbit misalignment in exoplanetary systems". Monthly Notices of the Royal Astronomical Society: Letters. 413 (1): L71–L75. arXiv:1009.4132. Bibcode:2011MNRAS.413L..71W. doi:10.1111/j.1745-3933.2011.01036.x. S2CID 55106618.
- ^ a b c d Ardila, D. R.; et al. (2004). "A resolved debris disk around the G2 V star HD 107146". The Astrophysical Journal Letters. 617 (2): L147–L150. arXiv:astro-ph/0411422. Bibcode:2004ApJ...617L.147A. doi:10.1086/427434. S2CID 1961218.
- ^ a b Brugamyer, Erik; et al. (September 2011). "Silicon and Oxygen Abundances in Planet-host Stars". The Astrophysical Journal. 738 (1): 97. arXiv:1106.5509. Bibcode:2011ApJ...738...97B. doi:10.1088/0004-637X/738/1/97. S2CID 119208986.
- ^ a b c d e Williams, Jonathan P.; et al. (March 2004). "Detection of cool dust around the G2 V star HD 107146". The Astrophysical Journal. 604 (1): 414–419. arXiv:astro-ph/0311583. Bibcode:2004ApJ...604..414W. doi:10.1086/381721. S2CID 18799183.
- ^ a b Corder, S. A.; et al. (2009). "A resolved ring of debris dust around the solar analog HD 107146". The Astrophysical Journal. 690 (1): L65–L68. arXiv:0811.2713. Bibcode:2009ApJ...690L..65C. doi:10.1088/0004-637X/690/1/L65. S2CID 759427.
- ^ Metchev, Stanimir A.; Hillenbrand, Lynne A.; Meyer, Michael R. (January 2004). "Ten micron observations of nearby young stars". The Astrophysical Journal. 600 (1): 435–450. arXiv:astro-ph/0309453. Bibcode:2004ApJ...600..435M. doi:10.1086/379788. S2CID 5286500.
- ^ "Spitzer and Hubble capture evolving planetary systems". hubblesite.org. December 9, 2004. Retrieved 2011-12-14.
- ^ a b c Marino, S.; Carpenter, J.; Wyatt, M. C.; Booth, M.; Casassus, S.; Faramaz, V.; Guzman, V.; Hughes, A. M.; Isella, A.; Kennedy, G. M.; Matrà, L.; Ricci, L.; Corder, S. (2018), "A gap in the planetesimal disc around HD 107146 and asymmetric warm dust emission revealed by ALMA", Monthly Notices of the Royal Astronomical Society, 479 (4): 5423–5439, arXiv:1805.01915, doi:10.1093/mnras/sty1790
- ^ Mesa, D.; et al. (2021), "Limits on the presence of planets in systems with debris discs: HD 92945 and HD 107146", Monthly Notices of the Royal Astronomical Society, 503: 1276–1289, arXiv:2102.05353, doi:10.1093/mnras/stab438
- ^ "Viewing the Vermin Galaxy". www.spacetelescope.org. Retrieved 29 May 2017.