Psi5 Aurigae
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 06h 46m 44.337s[2] |
| Declination | +43° 34′ 38.73″[2] |
| Apparent magnitude (V) | 5.200±0.031[3] |
| Characteristics | |
| Spectral type | G0 V[4] |
| U−B color index | +0.06[5] |
| B−V color index | +0.573±0.015[3] |
| Astrometry | |
| Radial velocity (Rv) | −24[6] km/s |
| Proper motion (μ) | RA: −2.705 mas/yr[2] Dec.: +164.523 mas/yr[2] |
| Parallax (π) | 60.2024±0.0865 mas[2] |
| Distance | 54.18 ± 0.08 ly (16.61 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.13[6] |
| Details | |
| Mass | 1.17±0.04[3] M☉ |
| Radius | 1.18+0.14 −0.02[3] R☉ |
| Luminosity | 1.752[3] L☉ |
| Surface gravity (log g) | 4.35±0.03[3] cgs |
| Temperature | 6,086±50[3] K |
| Metallicity [Fe/H] | +0.09±0.09[3] dex |
| Rotational velocity (v sin i) | 5.03[7] km/s |
| Age | 3.2[6] Gyr |
| Other designations | |
| ψ5 Aurigae, 56 Aurigae, BD+43°1595, FK5 255, GC 8836, GJ 245, HD 48682, HIP 32480, HR 2483, SAO 41330, PPM 49322, ADS 5425[8] | |
| Database references | |
| SIMBAD | data |
Psi5 Aurigae is a star[9] in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ψ5 Aurigae, and abbreviated Psi5 Aur or ψ5 Aur. This star is faintly visible to the naked eye with an apparent visual magnitude of 5.25.[5] Based upon parallax measurements, this star is 54.2 light-years (16.6 parsecs) distant from Earth.[2] It is drifting closer to the Sun with a radial velocity of −24 km/s.[6]
This is an ordinary, Sun-like star with an orbiting debris disk. No exoplanetary companions have yet been discovered.
Observations
[edit]The spectrum of this star shows it to be an ordinary G-type main sequence star with a stellar classification of G0 V.[4] The properties are sufficiently similar to the Sun that it is considered a solar analog. It is an estimated 3.2[6] billion years old and is spinning with a projected rotational velocity of 5 km/s.[7] This star has 17% more mass and 18% greater radius compared to the Sun, while the composition is similar to the Sun. It is radiating 1.75 the luminosity of the Sun into space from its photosphere at an effective temperature of 6,086 K,[3] giving it the golden-hued glow of a G-type star.[10]
Observation in the infrared shows an excess emission that suggests the presence of a circumstellar disk of dust, known as a debris disk. This material has a mean temperature of 60 K, indicating that it is orbiting at a distance of about 84 au from the host star, ranging from 40 to 105 au with an inclination of 112.5°±4.2° to the plane of the sky.[3] The dust has about half the mass of the Moon and is around 600 million years old.[11] The star is being examined for evidence of extrasolar planets,[12] but none have been found as of 2006.
There is an optical companion[9] which is 36 arcseconds away and has an apparent magnitude of +8.4. Psi5 Aurigae used to be known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).[citation needed]
References
[edit]- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv:2208.00211, Bibcode:2023A&A...674A...1G, doi:10.1051/0004-6361/202243940, S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e f g h i j Hengst, S.; et al. (September 2020), "Multi-wavelength, spatially resolved modelling of HD 48682's debris disc", Monthly Notices of the Royal Astronomical Society, 497 (1): 1098–1109, arXiv:2006.13614, Bibcode:2020MNRAS.497.1098H, doi:10.1093/mnras/staa1972.
- ^ a b Cenarro, A. J.; et al. (January 2007), "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters", Monthly Notices of the Royal Astronomical Society, 374 (2): 664–690, arXiv:astro-ph/0611618, Bibcode:2007MNRAS.374..664C, doi:10.1111/j.1365-2966.2006.11196.x, S2CID 119428437.
- ^ a b Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133 (4): 475, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.
- ^ a b c d e Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511.
- ^ a b Martínez–Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF), Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725, S2CID 43455849, archived from the original (PDF) on 2017-09-22, retrieved 2018-11-04.
- ^ "psi05 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-24.
- ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-01-16.
- ^ Rodriguez, David R.; Zuckerman, B. (February 2012), "Binaries among Debris Disk Stars", The Astrophysical Journal, 745 (2): 147, arXiv:1111.5618, Bibcode:2012ApJ...745..147R, doi:10.1088/0004-637X/745/2/147, S2CID 73681879.
- ^ Grether, Daniel; Lineweaver, Charles H. (April 2006), "How Dry is the Brown Dwarf Desert? Quantifying the Relative Number of Planets, Brown Dwarfs, and Stellar Companions around Nearby Sun-like Stars", The Astrophysical Journal, 640 (2): 1051–1062, arXiv:astro-ph/0412356, Bibcode:2006ApJ...640.1051G, doi:10.1086/500161, S2CID 8563521.
