NU PAVONIS

NU Pavonis
	; A visual band light curve for NU Pavonis, plotted from data published by Tabur et al. (2009)
Observation data; Epoch J2000 Equinox J2000
Constellation	Pavo
Right ascension	20h 01m 44.74682s
Declination	−59° 22′ 33.1864″
Apparent magnitude (V)	4.95
Characteristics
Spectral type	M6 III
B−V color index	1.356±0.011
Variable type	SRb
Astrometry
Radial velocity (Rv)	−10.3±2.8 km/s
Proper motion (μ)	RA: +20.385 mas/ yr ; Dec.: −26.769 mas/ yr
Parallax (π)	7.0208 ± 0.4464 mas
Distance	460 ± 30 ly ; (142 ± 9 pc)
Absolute magnitude (MV)	−0.86
Details
Radius	204±29 R☉
Luminosity	7,412 L☉
Surface gravity (log g)	0.87 cgs
Temperature	3,516±275 K
Other designations
	NU Pav, CD−59° 7361, FK5 3598, HD 189124, HIP 98608, HR 7625, SAO 246389
Database references
SIMBAD	data

NU Pavonis (N-U, not "nu") is a variable star in the southern constellation of Pavo. With a nominal apparent visual magnitude of 4.95,^[3] it is a faint star but visible to the naked eye. The distance to NU Pav, as determined from its annual parallax shift of 7.0 mas^[2] as seen from Earth's orbit, is around 460 light years. It is moving closer with a heliocentric radial velocity of −10 km/s.^[6]

This is an aging red giant with a stellar classification of M6 III,^[4] currently on the asymptotic giant branch. It is a semiregular variable star of sub-type SRb that ranges in magnitude from 4.91 down to 5.26 with a period of 60 days.^[7] The star has expanded to 204^[7] times the Sun's radius and is radiating 7,412^[3] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,516 K.^[7] Far-ultraviolet emission has been detected from these coordinates, which may be coming from a companion star.^[8]

References

^ Tabur, V.; Bedding, T. R.; Kiss, L. L.; Moon, T. T.; Szeidl, B.; Kjeldsen, H. (December 2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society. 400 (4): 1945–1961. arXiv: 0908.3228. Bibcode: 2009MNRAS.400.1945T. doi: 10.1111/j.1365-2966.2009.15588.x.
^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051.
^ ^a ^b ^c ^d ^e ^f Anderson, 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.
^ ^a ^b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
^ Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode: 2017ARep...61...80S. doi: 10.1134/S1063772917010085. S2CID 125853869.
^ ^a ^b Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv: 1606.08053, Bibcode: 2006AstL...32..759G, doi: 10.1134/S1063773706110065, S2CID 119231169.
^ ^a ^b ^c ^d ^e Arroyo-Torres, B.; et al. (June 2014), "VLTI/AMBER observations of cold giant stars: atmospheric structures and fundamental parameters", Astronomy & Astrophysics, 566: 11, arXiv: 1404.7384, Bibcode: 2014A&A...566A..88A, doi: 10.1051/0004-6361/201323264, S2CID 16778588, A88.
^ ^a ^b Ortiz, Roberto; Guerrero, Martín A. (2016), "Ultraviolet emission from main-sequence companions of AGB stars", Monthly Notices of the Royal Astronomical Society, 461 (3): 3036, arXiv: 1606.09086, Bibcode: 2016MNRAS.461.3036O, doi: 10.1093/mnras/stw1547, S2CID 118619933.
^ "NU Pav". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 September 2018.

[Tabur2009-1] Tabur, V.; Bedding, T. R.; Kiss, L. L.; Moon, T. T.; Szeidl, B.; Kjeldsen, H. (December 2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society. 400 (4): 1945–1961. arXiv: 0908.3228. Bibcode: 2009MNRAS.400.1945T. doi: 10.1111/j.1365-2966.2009.15588.x.

[GaiaDR2-2] ^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051.

[Anderson2012-3] ^ ^a ^b ^c ^d ^e ^f Anderson, 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.

[houk1979-4] Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.

[gcvs-5] Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode: 2017ARep...61...80S. doi: 10.1134/S1063772917010085. S2CID 125853869.

[Gontcharov2006-6] Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv: 1606.08053, Bibcode: 2006AstL...32..759G, doi: 10.1134/S1063773706110065, S2CID 119231169.

[ArroyoTorres2014-7] Arroyo-Torres, B.; et al. (June 2014), "VLTI/AMBER observations of cold giant stars: atmospheric structures and fundamental parameters", Astronomy & Astrophysics, 566: 11, arXiv: 1404.7384, Bibcode: 2014A&A...566A..88A, doi: 10.1051/0004-6361/201323264, S2CID 16778588, A88.

[ortiz2016-8] Ortiz, Roberto; Guerrero, Martín A. (2016), "Ultraviolet emission from main-sequence companions of AGB stars", Monthly Notices of the Royal Astronomical Society, 461 (3): 3036, arXiv: 1606.09086, Bibcode: 2016MNRAS.461.3036O, doi: 10.1093/mnras/stw1547, S2CID 118619933.

[SIMBAD-9] "NU Pav". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 September 2018.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

Observation data Epoch J2000 Equinox J2000
A visual band light curve for NU Pavonis, plotted from data published by Tabur et al. (2009)^[1]
Constellation	Pavo
Right ascension	20^h 01^m 44.74682^s^[2]
Declination	−59° 22′ 33.1864″^[2]
Apparent magnitude (V)	4.95^[3]
Characteristics
Spectral type	M6 III^[4]
B−V color index	1.356±0.011^[3]
Variable type	SRb^[5]
Astrometry

Radial velocity (R_v)	−10.3±2.8^[6] km/s
Proper motion (μ)	RA: +20.385^[2] mas/ yr Dec.: −26.769^[2] mas/ yr
Parallax (π)	7.0208 ± 0.4464 mas^[2]
Distance	460 ± 30 ly (142 ± 9 pc)
Absolute magnitude (M_V)	−0.86^[3]

Details

Radius	204±29^[7] `R`_☉
Luminosity	7,412^[3] `L`_☉
Surface gravity (log g)	0.87^[8] cgs
Temperature	3,516±275^[7] K

Other designations
NU Pav, CD−59° 7361, FK5 3598, HD 189124, HIP 98608, HR 7625, SAO 246389^[9]
Database references
SIMBAD	data

Observation data Epoch J2000 Equinox J2000
A visual band light curve for NU Pavonis, plotted from data published by Tabur et al. (2009)^[1]
Constellation	Pavo
Right ascension	20^h 01^m 44.74682^s^[2]
Declination	−59° 22′ 33.1864″^[2]
Apparent magnitude (V)	4.95^[3]
Characteristics
Spectral type	M6 III^[4]
B−V color index	1.356±0.011^[3]
Variable type	SRb^[5]
Astrometry

Radial velocity (R_v)	−10.3±2.8^[6] km/s
Proper motion (μ)	RA: +20.385^[2] mas/ yr Dec.: −26.769^[2] mas/ yr
Parallax (π)	7.0208 ± 0.4464 mas^[2]
Distance	460 ± 30 ly (142 ± 9 pc)
Absolute magnitude (M_V)	−0.86^[3]

Details

Radius	204±29^[7] `R`_☉
Luminosity	7,412^[3] `L`_☉
Surface gravity (log g)	0.87^[8] cgs
Temperature	3,516±275^[7] K

Other designations
NU Pav, CD−59° 7361, FK5 3598, HD 189124, HIP 98608, HR 7625, SAO 246389^[9]
Database references
SIMBAD	data

References

References

Videos

Websites

Encyclopedia

Facebook