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Nu Microscopii

From Wikipedia, the free encyclopedia
Star in the constellation Microscopium
ν Microscopii
Observation data
EpochJ2000.0      EquinoxJ2000.0 (ICRS)
ConstellationMicroscopium
Right ascension20h 33m 55.07257s[1]
Declination−44° 30′ 57.7642″[1]
Apparent magnitude (V)5.12[2]
Characteristics
Evolutionary stagered giant branch[1]
Spectral typeK0 III[3]
U−Bcolor index+1.009[4]
B−Vcolor index+0.999±0.002[2]
Astrometry
Radial velocity (Rv)8.7±2[5] km/s
Proper motion (μ)RA: +11.560[1]mas/yr
Dec.: −35.355[1]mas/yr
Parallax (π)12.9361±0.0955 mas[1]
Distance252 ± 2 ly
(77.3 ± 0.6 pc)
Absolute magnitude (MV)+0.84[2]
Details
Mass2.46[6] M☉
Radius11[1] R☉
Luminosity59[1] L☉
Surface gravity (log g)2.78[6] cgs
Temperature4,832[1] K
Metallicity [Fe/H]+0.05±0.10[6] dex
Rotational velocity (v sin i)2.02[6] km/s
Age377[1] Myr
Other designations
ν Mic, ν Ind,CD−44°14020,FK5 3643,HD 195569,HIP 101477,HR 7846,SAO 230276[7]
Database references
SIMBADdata

ν Microscopii,Latinized asNu Microscopii, is astar in theconstellationMicroscopium. It is an orange-hued star that is visible to the naked eye as a faint point of light with anapparent visual magnitude of 5.12. It is located at a distance of around 252 light-years from the Sun, based onparallax, and is drifting further away with aradial velocity of about +9 km/s.

ν Microscopii is an aginggiant star with astellar classification of K0 III.[3] It has expanded to 11 times the girth of the Sun after exhausting the supply of hydrogen at itscore andevolving off themain sequence. The star has 2.46 times themass of the Sun.[6] It is radiating 59 times theSun's luminosity from its swollenphotosphere at aneffective temperature of 4,832 K.

ν Microscopii was first catalogued asNu Indi by the French explorer and astronomerNicolas Louis de Lacaille in 1756, before being reclassified in Microscopium and given its current Bayer designation of Nu Microscopii byGould.[8] Despite this, most recent studies and theSIMBAD database use the designation Nu Indi for the starHD 211998.[9][10][11][12][13]

References

[edit]
  1. ^abcdefghijVallenari, 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 atVizieR.
  2. ^abcAnderson, 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.S2CID 119257644.
  3. ^abHouk, Nancy (1978).Michigan catalogue of two-dimensional spectral types for the HD stars.Bibcode:1978mcts.book.....H.Accessed using SIMBAD
  4. ^Oja, T. (1970). "UBV-Fotometri danska Tel (ESO)".Private Communication.Bibcode:1970Priv.........0O.Accessed using SIMBAD
  5. ^Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities".Carnegie Institute Washington D.C. Publication.Bibcode:1953GCRV..C......0W.
  6. ^abcdeJones, M. I.; Jenkins, J. S.; Rojo, P.; Melo, C. H. F. (December 2011). "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. I. Sample definition and physical properties".Astronomy & Astrophysics.536:71–76.arXiv:1110.6459.Bibcode:2011A&A...536A..71J.doi:10.1051/0004-6361/201117887.S2CID 55769003.
  7. ^"nu. Mic".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2019-10-01.
  8. ^Wagman, Morton (2003).Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, Virginia: The McDonald & Woodward Publishing Company. pp. 181, 210.ISBN 978-0-939923-78-6.
  9. ^"nu Ind".SIMBAD.Centre de données astronomiques de Strasbourg.
  10. ^Chaplin, William J.; Serenelli, Aldo M.; Miglio, Andrea; Morel, Thierry; Mackereth, J. Ted; Vincenzo, Fiorenzo; Kjeldsen, Hans; Basu, Sarbani; Ball, Warrick H.; Stokholm, Amalie; Verma, Kuldeep; Mosumgaard, Jakob Rørsted; Silva Aguirre, Victor; Mazumdar, Anwesh; Ranadive, Pritesh (April 2020). "Age dating of an early Milky Way merger via asteroseismology of the naked-eye star ν Indi".Nature Astronomy.4 (4):382–389.arXiv:2001.04653.doi:10.1038/s41550-019-0975-9.ISSN 2397-3366.
  11. ^Carrier, F.; Kjeldsen, H.; Bedding, T. R.; Brewer, B. J.; Butler, R. P.; Eggenberger, P.; Grundahl, F.; McCarthy, C.; Retter, A.; Tinney, C. G. (2007-08-01). "Solar-like oscillations in the metal-poor subgiant ν Indi - II. Acoustic spectrum and mode lifetime".Astronomy & Astrophysics.470 (3):1059–1063.arXiv:0706.0795.doi:10.1051/0004-6361:20066901.ISSN 0004-6361.
  12. ^Bedding, Timothy R.; Butler, R. Paul; Carrier, Fabien; Bouchy, Francois; Brewer, Brendon J.; Eggenberger, Patrick; Grundahl, Frank; Kjeldsen, Hans; McCarthy, Chris; Nielsen, Tine Bjørn; Retter, Alon; Tinney, Christopher G. (2006-08-10). "Solar-like Oscillations in the Metal-poor Subgiant ν Indi: Constraining the Mass and Age Using Asteroseismology".The Astrophysical Journal.647 (1): 558.arXiv:astro-ph/0604453.doi:10.1086/505295.ISSN 0004-637X.
  13. ^Bruntt, H.; Bedding, T. R.; Quirion, P.-O.; Lo Curto, G.; Carrier, F.; Smalley, B.; Dall, T. H.; Arentoft, T.; Bazot, M.; Butler, R. P. (2010-07-01). "Accurate fundamental parameters for 23 bright solar-type stars".Monthly Notices of the Royal Astronomical Society.405 (3):1907–1923.arXiv:1002.4268.doi:10.1111/j.1365-2966.2010.16575.x.ISSN 0035-8711.
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