Langbahn Team – Weltmeisterschaft

HD 27274

HD 27274
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Dorado
Right ascension 04h 15m 56.90154s[1]
Declination −53° 18′ 35.3067″[1]
Apparent magnitude (V) 7.63[2]
Characteristics
Spectral type K4.5 Vk:[3]
U−B color index +1.08[2]
B−V color index +1.12[2]
Astrometry
Radial velocity (Rv)−23.4±0.3[4] km/s
Proper motion (μ) RA: +784.529 mas/yr[1]
Dec.: +396.695 mas/yr[1]
Parallax (π)76.6638 ± 0.0146 mas[1]
Distance42.544 ± 0.008 ly
(13.044 ± 0.002 pc)
Absolute magnitude (MV)+7.06[5]
Details
Mass0.73±0.09[6] M☉
Radius0.70±0.05[6] R☉
Luminosity19.6±0.5%[1] L☉
Surface gravity (log g)4.64[7] cgs
Temperature4,602±80[7] K
Metallicity [Fe/H]+0.16±0.01[7] dex
Rotational velocity (v sin i)1[8] km/s
Age4.5[9] Gyr
Other designations
CD−53° 889, CPD−53° 672, GC 5176, GJ 167, HD 27274, HIP 19884, SAO 233456[10]
Database references
SIMBADdata
ARICNSdata

HD 27274, also known as Gliese 167, is a solitary,[11] orange hued star located in the southern constellation Dorado. It has an apparent magnitude of 7.63,[2] making it readily visible in binoculars, but not to the naked eye. Based on parallax measurements from the Gaia spacecraft, the star is known to be located 42.5 light-years (13.02 parsecs) away from the Solar System[1] However, it is drifting closer with a heliocentric radial velocity of −23 km/s. At its current distance, HD 27274 is dimmed down by 0.05 magnitudes due to interstellar dust.[12]

HD 27274 has a stellar classification of K4.5 Vk:,[3] indicating that it is a K-type main-sequence star with interstellar absorption features. However, there is uncertainty behind the classification. At present it has 73% the mass of the Sun and 70% of its radius.[6] It has an effective temperature of 4,602 K,[7] but its small size yields a luminosity only 19.6% that of the Sun.[1] HD 27274 is metal enriched, having an iron abundance 44.6% above solar levels.[7] The star spins with a projected rotational velocity of 1 km/s,[8] and is estimated to be 4.5 billion years old.[9] This is similar to the Sun's current age (4.6 Gyr).

References

  1. ^ a b c d e f g 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.
  2. ^ a b c d Koen, C.; Kilkenny, D.; van Wyk, F.; Marang, F. (21 April 2010). "UBV(RI)C JHKobservations ofHipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x. eISSN 1365-2966. ISSN 0035-8711.
  3. ^ a b Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  4. ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
  5. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  6. ^ a b c Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881.
  7. ^ a b c d e Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (26 May 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey⋆". Astronomy & Astrophysics. 530: A138. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. eISSN 1432-0746. ISSN 0004-6361.
  8. ^ a b Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (16 April 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood". Astronomy & Astrophysics. 418 (3): 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959. eISSN 1432-0746. ISSN 0004-6361.
  9. ^ a b Jenkins, J. S.; Jones, H. R. A.; Tinney, C. G.; Butler, R. P.; McCarthy, C.; Marcy, G. W.; Pinfield, D. J.; Carter, B. D.; Penny, A. J. (11 October 2006). "An activity catalogue of southern stars". Monthly Notices of the Royal Astronomical Society. 372 (1): 163–173. arXiv:astro-ph/0607336. Bibcode:2006MNRAS.372..163J. doi:10.1111/j.1365-2966.2006.10811.x. eISSN 1365-2966. ISSN 0035-8711.
  10. ^ "Gliese 167". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved August 23, 2022.
  11. ^ Rodriguez, David R.; Duchêne, Gaspard; Tom, Henry; Kennedy, Grant M.; Matthews, Brenda; Greaves, Jane; Butner, Harold (8 April 2015). "Stellar multiplicity and debris discs: an unbiased sample". Monthly Notices of the Royal Astronomical Society. 449 (3): 3160–3170. arXiv:1503.01320. Bibcode:2015MNRAS.449.3160R. doi:10.1093/mnras/stv483. eISSN 1365-2966. ISSN 0035-8711.
  12. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
Quelle: https://en.wikipedia.org/wiki/HD_27274