Astronomy:HD 180134

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Short description: F-type star with a circumstellar disk
HD 180134
Telescopium constellation map.svg
Red circle.svg
Location of HD 180134
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Telescopium
Right ascension  19h 18m 09.78130s[1]
Declination −53° 23′ 13.5119″[1]
Apparent magnitude (V) 6.36±0.01[2]
Characteristics
Spectral type F7 V[3]
B−V color index +0.49[4]
Astrometry
Radial velocity (Rv)−22.5±0.3[5] km/s
Proper motion (μ) RA: +24.761[1] mas/yr
Dec.: −81.714[1] mas/yr
Parallax (π)21.9768 ± 0.0272[1] mas
Distance148.4 ± 0.2 ly
(45.50 ± 0.06 pc)
Absolute magnitude (MV)+3.09[6]
Details
Mass1.32[7] M☉
Radius1.90±0.07[8] R☉
Luminosity4.93±0.01[1] L☉
Surface gravity (log g)4.07±0.04[9] cgs
Temperature6,230±55[8] K
Metallicity [Fe/H]−0.03±0.05[9] dex
Rotational velocity (v sin i)10±3[10] km/s
Age3.28±0.51[11] Gyr
Other designations
CD−53°8089, CPD−53°9513, GC 26573, HD 180134, HIP 94858, HR 7297, SAO 246017[12]
Database references
SIMBADdata

HD 180134 (HR 7297; 52 G. Telescopii) is a solitary star located in the southern constellation Telescopium. It has an apparent magnitude of 6.36,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively close at a distance of 148.4 light-years based on Gaia DR3 parallax measurements,[1] and it is drifting closer with a heliocentric radial velocity of −22.5 km/s.[5] At its current distance, HD 180134's brightness is diminished by two-tenths of a magnitude due to interstellar extinction[13] and it has an absolute magnitude of +3.09.[6]

HD 180134 has a stellar classification of F7 V,[3] indicating that it is an ordinary F-type main-sequence star that is currently generating energy via hydrogen fusion at its core. It has 1.32 times the mass of the Sun[7] and 1.9 times the radius of the Sun.[8] It radiates 4.93 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,230 K,[8] giving a whitish-yellow hue when viewed in the night sky. HD 180134 is slightly metal deficient with an iron abundance 93% that of the Sun or [Fe/H] = −0.03,[9] and it spins modestly with a projected rotational velocity of approximately 10 km/s.[10] At the age of 3.28 billion years,[11] it is 1.49 magnitudes above the zero age main sequence, meaning that it is evolved.[14]

In 2006, an infrared excess was detected around the star, which could indicate the presence of a circumstellar disk. The disk has a temperature less than 145 K, making it a cool disk; it has an angular separation greater than 0.19 arcseconds or a physical separation greater than 8.6 astronomical units.[15]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53°. 1. Bibcode: 1975mcts.book.....H. 
  4. ↑ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 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. 
  7. ↑ 7.0 7.1 Lambert, David L.; Reddy, Bacham E. (January 14, 2004). "Lithium abundances of the local thin disc stars". Monthly Notices of the Royal Astronomical Society (Oxford University Press (OUP)) 349 (2): 757–767. doi:10.1111/j.1365-2966.2004.07557.x. ISSN 0035-8711. Bibcode: 2004MNRAS.349..757L. 
  8. ↑ 8.0 8.1 8.2 8.3 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. 
  9. ↑ 9.0 9.1 9.2 Ramírez, I.; Fish, J. R.; Lambert, D. L.; Allende Prieto, C. (13 August 2012). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal 756 (1): 46. doi:10.1088/0004-637X/756/1/46. ISSN 0004-637X. Bibcode: 2012ApJ...756...46R. 
  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 Feltzing, S.; Holmberg, J.; Hurley, J. R. (October 2001). "The solar neighbourhood age-metallicity relation - Does it exist?". Astronomy & Astrophysics 377 (3): 911–924. doi:10.1051/0004-6361:20011119. ISSN 0004-6361. Bibcode: 2001A&A...377..911F. 
  12. ↑ "HD 180134". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+180134. 
  13. ↑ 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. 
  14. ↑ 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. 
  15. ↑ Smith, P. S.; Hines, D. C.; Low, F. J.; Gehrz, R. D.; Polomski, E. F.; Woodward, C. E. (June 6, 2006). "Spitzer Far-Infrared Detections of Cold Circumstellar Disks". The Astrophysical Journal (American Astronomical Society) 644 (2): L125–L128. doi:10.1086/505749. ISSN 0004-637X. Bibcode: 2006ApJ...644L.125S. 
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