Nu Mensae: Difference between revisions

ν Mensae
	Location of ν Mensae (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Mensa
Right ascension	04h 20m 58.0721s
Declination	−81° 34′ 47.7188″
Apparent magnitude (V)	5.76 ± 0.01
Characteristics
Spectral type	F0/2 III
U−B color index	+0.05
B−V color index	+0.35
Astrometry
Radial velocity (Rv)	9.1 ± 2.8 km/s
Proper motion (μ)	RA: +10.182 mas/yr ; Dec.: +125.469 mas/yr
Parallax (π)	18.4754 ± 0.0273 mas
Distance	176.5 ± 0.3 ly ; (54.13 ± 0.08 pc)
Absolute magnitude (MV)	+2.09
Details
Mass	1.69 M☉
Radius	2.39 R☉
Luminosity	13.8 L☉
Surface gravity (log g)	3.94 cgs
Temperature	6,921 ± 139 K
Metallicity [Fe/H]	−0.08 dex
Rotational velocity (v sin i)	108 ± 5 km/s
Age	1.7 Gyr
Other designations
	ν Mensae, 8 G. Mensae, CPD−81°115, GC 5418, HD 29116, HIP 20297, HR 1456, SAO 258378
Database references
SIMBAD	data

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Nu Mensae, Latinized from ν Mensae, is a solitary^[10] star situated in the southern circumpolar constellation Mensa. It has an apparent magnitude of 5.76,^[2] making it faintly visible to the naked eye. The star is located relatively close at a distance of 176 light years^[1] but is receding with a heliocentric radial velocity of 9.1 km/s.^[5]

Nu Mensae has a stellar classification of F0/2 III,^[3] indicating that it is a giant star with the blended spectrum of a F0 and F2 star. The star has an angular diameter of 0.41±0.03 mas,^[11] which yields a diameter 2.39^[7] times that of the Sun at its estimated distance. At present it has 169%^[6] the mass of the Sun and shies at 13.8^[8] times the luminosity of the Sun from its photosphere at an effective temperature of 6,921^[6] K, giving it a white glow with a yellow tint. Despite an age of 1.7 billion years,^[6] Nu Mensae spins rapidly with a projected rotational velocity of 108 km/s^[9] and is slightly metal deficient.^[6]

References

^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ ^a ^b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
^ ^a ^b 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_ƒ0. Bibcode:1975mcts.book.....H.
^ ^a ^b 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.
^ ^a ^b 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. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (June 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. ISSN 0004-6361.
^ ^a ^b Lang, Kenneth R. (2006). Astrophysical formulae. Astronomy and astrophysics library. Vol. 1 (3 ed.). Birkhäuser. ISBN 3-540-29692-1.. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(54.13\cdot 0.41\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 4.77\cdot R_{\bigodot }\end{aligned}}$
^ ^a ^b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
^ ^a ^b Ammler-von Eiff, M.; Reiners, A. (June 2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: A116. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. ISSN 0004-6361.
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976
^ Lafrasse, Sylvain; Mella, Guillaume; Bonneau, Daniel; Duvert, Gilles; Delfosse, Xavier; Chesneau, Olivier; Chelli, Alain (16 July 2010). "Building the 'JMMC Stellar Diameters Catalog' using SearchCal". Optical and Infrared Interferometry II. Vol. 7734. pp. 77344E. arXiv:1009.0137. Bibcode:2010SPIE.7734E..4EL. doi:10.1117/12.857024. S2CID 32097037.

[EDR3-1] ^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[Tycho2000-2] Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.

[Houk1975-3] 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_ƒ0. Bibcode:1975mcts.book.....H.

[Johnson1966-4] 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.

[Gontcharov2006-5] 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. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737.

[Casagrande2011-6] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (June 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. ISSN 0004-6361.

[Lang2006-7] Lang, Kenneth R. (2006). Astrophysical formulae. Astronomy and astrophysics library. Vol. 1 (3 ed.). Birkhäuser. ISBN 3-540-29692-1.. The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(54.13\cdot 0.41\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 4.77\cdot R_{\bigodot }\end{aligned}}$

[McDonald2012-8] McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.

[Ammler2012-9] Ammler-von Eiff, M.; Reiners, A. (June 2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: A116. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. ISSN 0004-6361.

[Eggleton2008-10] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976

[Lafrasse2010-11] Lafrasse, Sylvain; Mella, Guillaume; Bonneau, Daniel; Duvert, Gilles; Delfosse, Xavier; Chesneau, Olivier; Chelli, Alain (16 July 2010). "Building the 'JMMC Stellar Diameters Catalog' using SearchCal". Optical and Infrared Interferometry II. Vol. 7734. pp. 77344E. arXiv:1009.0137. Bibcode:2010SPIE.7734E..4EL. doi:10.1117/12.857024. S2CID 32097037.

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Observation data Epoch J2000 Equinox J2000
Location of ν Mensae (circled)
Constellation	Mensa
Right ascension	04^h 20^m 58.0721^s^[1]
Declination	−81° 34′ 47.7188″^[1]
Apparent magnitude (V)	5.76 ± 0.01^[2]
Characteristics
Spectral type	F0/2 III^[3]
U−B color index	+0.05^[4]
B−V color index	+0.35^[4]
Astrometry

Radial velocity (R_v)	9.1 ± 2.8^[5] km/s
Proper motion (μ)	RA: +10.182^[1] mas/yr Dec.: +125.469^[1] mas/yr
Parallax (π)	18.4754 ± 0.0273 mas^[1]
Distance	176.5 ± 0.3 ly (54.13 ± 0.08 pc)
Absolute magnitude (M_V)	+2.09

Details

Mass	1.69^[6] `M`_☉
Radius	2.39^[7] `R`_☉
Luminosity	13.8^[8] `L`_☉
Surface gravity (log g)	3.94^[6] cgs
Temperature	6,921 ± 139^[6] K
Metallicity [Fe/H]	−0.08^[6] dex
Rotational velocity (v sin i)	108 ± 5^[9] km/s
Age	1.7^[6] Gyr

Other designations
ν Mensae, 8 G. Mensae, CPD−81°115, GC 5418, HD 29116, HIP 20297, HR 1456, SAO 258378
Database references
SIMBAD	data