Astronomy:HD 11007

From HandWiki
Short description: F-type main-sequence star in Triangulum
HD 11007
Location of HD 11007 on the map (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Triangulum
Right ascension  01h 48m 41.56269s[1]
Declination +32° 41′ 24.7521″[1]
Apparent magnitude (V) 5.81[2]
Characteristics
Spectral type F8 V[3]
U−B color index −0.03[2]
B−V color index +0.54[2]
Astrometry
Radial velocity (Rv)−24.4±0.3[4] km/s
Proper motion (μ) RA: −167.798[1] mas/yr
Dec.: +296.869[1] mas/yr
Parallax (π)36.0886 ± 0.0529[1] mas
Distance90.4 ± 0.1 ly
(27.71 ± 0.04 pc)
Absolute magnitude (MV)+3.56[5]
Details
Mass1.11[6] M☉
Radius1.67±0.04[7] R☉
Luminosity3.228+0.011−0.010[1] L☉
Surface gravity (log g)4.03±0.03[8] cgs
Temperature6,060±64[7] K
Metallicity [Fe/H]−0.20[9] dex
Rotational velocity (v sin i)5±3[10] km/s
Age6.6±0.5[11] Gyr
Other designations
BD+31°316, FK5 2120, GC 2195, HD 11007, HIP 8433, HR 523, SAO 54994, LTT 10624[12]
Database references
SIMBADdata

HD 11007 (LTT 10624; HR 523) is a probable astrometric binary[13] located in the northern constellation Triangulum. The primary is faintly visible to the naked eye as a whitish-yellow-hued star with an apparent magnitude of 5.81.[2] The system is located relatively close at a distance of 90.4 light-years based on Gaia DR3 parallax measurements[1] and it is drifting closer with a heliocentric radial velocity of −24.4 km/s.[4] At its current distance, HD 11007's brightness is diminished by an interstellar extinction of 0.09 magnitudes[14] and it has an absolute magnitude of +3.56.[5] It is moving relatively fast across the celestial sphere,[15] having a high proper motion of 341 mas/yr.[1]

The primary has a stellar classification of F8 V,[3] indicating that it is an ordinary F-type main-sequence star that is generating energy via hydrogen fusion at its core. However, it is slightly evolved, being 1.62 magnitudes above the zero age main sequence.[16] It has 111% the mass of the Sun[6] and a slightly enlarged radius 1.67 times that of the Sun.[7] It is slightly over luminous for its class, radiating 3.23 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,060 K.[7] HD 11007 A is metal deficient with an iron abundance that is 63.1% solar[9] and it spins modestly with a somewhat constrained projected rotational velocity of approximately 5 km/s.[10] The system is estimated to be 6.6 billion years old; it was suspected to be part of the thick disk population[11] but is now considered to be one of the older members of the thin disk population.[17]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Imagawa, Fumihiko (February 1967). "Observational Results of Three-color Photometry for F-type Stars (II)" (in en). Memoirs of the College of Science, University of Kyoto. Series A 31 (2): 93–100. https://cir.nii.ac.jp/crid/1050849378475608960. 
  3. ↑ 3.0 3.1 Harlan, E. A. (June 1974). "MK classifications for F-and G-type stars. 3.". The Astronomical Journal 79: 682. doi:10.1086/111597. ISSN 0004-6256. Bibcode: 1974AJ.....79..682H. 
  4. ↑ 4.0 4.1 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. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  5. ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  6. ↑ 6.0 6.1 Lambert, David L.; Reddy, Bacham E. (2004). "Lithium abundances of the local thin disc stars". Monthly Notices of the Royal Astronomical Society 349 (2): 757–767. doi:10.1111/j.1365-2966.2004.07557.x. Bibcode: 2004MNRAS.349..757L. 
  7. ↑ 7.0 7.1 7.2 7.3 Masana, E.; Jordi, C.; Ribas, I. (10 April 2006). "Effective temperature scale and bolometric corrections from 2MASS photometry". Astronomy & Astrophysics 450 (2): 735–746. doi:10.1051/0004-6361:20054021. ISSN 0004-6361. Bibcode: 2006A&A...450..735M. 
  8. ↑ Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (June 2018). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy & Astrophysics 614: A55. doi:10.1051/0004-6361/201732209. ISSN 0004-6361. Bibcode: 2018A&A...614A..55A. 
  9. ↑ 9.0 9.1 Mishenina, T; Pignatari, M; Gorbaneva, T; Travaglio, C; Côté, B; Thielemann, F-K; Soubiran, C (October 21, 2019). "Enrichment of the Galactic disc with neutron-capture elements: Mo and Ru". Monthly Notices of the Royal Astronomical Society 489 (2): 1697–1708. doi:10.1093/mnras/stz2202. ISSN 0035-8711. Bibcode: 2019MNRAS.489.1697M. 
  10. ↑ 10.0 10.1 Balachandran, Suchitra (May 1990). "Lithium depletion and rotation in main-sequence stars". The Astrophysical Journal (American Astronomical Society) 354: 310. doi:10.1086/168691. ISSN 0004-637X. Bibcode: 1990ApJ...354..310B. 
  11. ↑ 11.0 11.1 Liu, Wilson M.; Chaboyer, Brian (December 2000). "The Relative Age of the Thin and Thick Galactic Disks". The Astrophysical Journal 544 (2): 818–829. doi:10.1086/317231. ISSN 0004-637X. Bibcode: 2000ApJ...544..818L. 
  12. ↑ "HD 11007". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+11007. 
  13. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E. 
  14. ↑ 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. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 
  15. ↑ Ivanov, G. A. (June 2002). "Cross-identifications of stars with high proper motion". Kinematika I Fizika Nebesnykh Tel 18 (3): 287–288. ISSN 0233-7665. Bibcode: 2002KFNT...18..287I. 
  16. ↑ Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (16 April 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood". Astronomy & Astrophysics 418 (3): 989–1019. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N. 
  17. ↑ Mishenina, T. V.; Soubiran, C.; Kovtyukh, V. V.; Korotin, S. A. (May 2004). "On the correlation of elemental abundances with kinematics among galactic disk stars". Astronomy & Astrophysics 418 (2): 551–562. doi:10.1051/0004-6361:20034454. ISSN 0004-6361. Bibcode: 2004A&A...418..551M. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_11007&oldid=3925236"