Astronomy:HD 70514

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Short description: Star in the constellation Volans
HD 70514
Volans constellation map.svg
Red circle.svg
HD 70514 is the star circled in red.
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Volans
Right ascension  08h 18m 18.80687s[1]
Declination −65° 36′ 47.4919″[1]
Apparent magnitude (V) 5.06±0.01[2]
Characteristics
Evolutionary stage RGB[3]
Spectral type K1 III[4]
U−B color index +1.19[5]
B−V color index +1.15[5]
Astrometry
Radial velocity (Rv)0.00±1.78[6] km/s
Proper motion (μ) RA: +21.054[1] mas/yr
Dec.: +21.799[1] mas/yr
Parallax (π)10.9324 ± 0.0626[1] mas
Distance298 ± 2 ly
(91.5 ± 0.5 pc)
Absolute magnitude (MV)+0.26[7]
Details
Mass1.88±0.29[3] M☉
Radius14.6[8] R☉
Luminosity93±1[1] L☉
Surface gravity (log g)2.27±0.47[9] cgs
Temperature4,610±90[10] K
Metallicity [Fe/H]+0.22[11] dex
Rotational velocity (v sin i)<1[12] km/s
Other designations
Database references
SIMBADdata

HD 70514, also known as HR 3280, is a solitary,[13] orange hued star located in the southern circumpolar constellation Volans, the flying fish. It has an apparent magnitude of 5.06,[2] making it one of the brighter members of this generally faint constellation. Based on parallax measurements from the Gaia spacecraft, the star is estimated to be 298 light years distant.[1] It appears that its distance to the Solar System isn't changing, having a heliocentric radial velocity of 0 km/s.[6] Eggen (1994) lists it as a member of the thin disk population.[11]

HD 70514 is classified as a red giant, having a stellar classification of K1 III. It is currently on the red giant branch, fusing a hydrogen shell around an inert helium. As a result, it has expanded to 14.6 times radius of the Sun[8] and now radiates 93 times its luminosity[1] from its enlarged photosphere at an effective temperature of 4,610 K.[10] Based on asteroseismologic measurements, HD 70514 has a mass 1.88 times that of the Sun.[3] HR 3280 is metal enriched, having a metallicity 66% above solar levels. Like most giants, it rotates rather slowly, having a projected rotational velocity of <1 km/s.[12]

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 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 3.2 Stello, D.; Bruntt, H.; Preston, H.; Buzasi, D. (15 January 2008). "Oscillating K Giants with the WIRESatellite: Determination of Their Asteroseismic Masses". The Astrophysical Journal 674 (1): L53–L56. doi:10.1086/528936. ISSN 0004-637X. Bibcode: 2008ApJ...674L..53S. 
  4. ↑ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode: 1975mcts.book.....H. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten 328 (9): 889–896. doi:10.1002/asna.200710776. ISSN 0004-6337. Bibcode: 2007AN....328..889K. 
  7. ↑ 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. 
  8. ↑ 8.0 8.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  9. ↑ Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics 352: 555–562. ISSN 0004-6361. Bibcode: 1999A&A...352..555A. 
  10. ↑ 10.0 10.1 Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R. et al. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics 633: A34. doi:10.1051/0004-6361/201936360. ISSN 0004-6361. Bibcode: 2020A&A...633A..34C. 
  11. ↑ 11.0 11.1 Eggen, O. J. (February 1994). "Evolved GK stars near the Sun. 2: The young disk population". The Astronomical Journal 107: 594. doi:10.1086/116879. ISSN 0004-6256. Bibcode: 1994AJ....107..594E. 
  12. ↑ 12.0 12.1 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014-01-01). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D. 
  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. 
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