HD 196050

Last updated
HD 196050
Observation data
Epoch J2000       Equinox J2000
Constellation Pavo
Right ascension 20h 37m 51.70984s [1]
Declination −60° 38′ 04.1460″ [1]
Apparent magnitude  (V)7.50 [2] + 10.62 [3] + 15.6 [3]
Characteristics
Spectral type G3V [4] + M1.5-M4.5 + M2.5-M5.5 [3]
B−V color index 0.667±0.010 [2]
Astrometry
Radial velocity (Rv)+61.37±0.12 [1]  km/s
Proper motion (μ)RA: −191.118(14)  mas/yr [1]
Dec.: −65.020(15)  mas/yr [1]
Parallax (π)19.7872 ± 0.0205  mas [1]
Distance 164.8 ± 0.2  ly
(50.54 ± 0.05  pc)
Absolute magnitude  (MV)4.01 [2]
Details [5]
A
Mass 1.18±0.02 [6]   M☉
Radius 1.46+0.02
−0.03  R☉
Luminosity 2.213+0.007
−0.006 [6]   L☉
Surface gravity (log g)4.32  cgs
Temperature 5,834+55
−52 [6]   K
Metallicity [Fe/H]0.34±0.06  dex
Rotation 16.0  d [7]
Rotational velocity (v sin i)3.0 km/s
Age 2.5±1.3  Gyr
Other designations
CPD−61° 6497, HD  196050, HIP  101806, SAO  254837, PPM  364690, WDS J20379-6038AB [8]
Database references
SIMBAD data

HD 196050 is a triple star [9] [3] system located in the southern constellation of Pavo. This system has an apparent magnitude of 7.50 [2] and the absolute magnitude is 4.01. [2] It is located at a distance of 165 light-years (51 parsecs ) from the Sun based on parallax, and is drifting further away with a radial velocity of +61 km/s. [1] It is also called by the Hipparcos designation HIP 101806.

Contents

Characteristics

The primary component is a G-type main-sequence star with a stellar classification of G3V. [4] It has a quiescent chromosphere and does not appear to be variable. [9] The star has 18% [6] more mass than the Sun and a 46% greater size. It is around 2.5 billion years old with a higher than solar metallicity, and is spinning with a projected rotational velocity of 3 km/s. [5] The star is radiating 2.21 [6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,834 K. [6]

A faint co-moving companion star, designated component B, was detected based on observations during 2003–2004, [9] located 10.80″ [3] to the south of the primary component. This corresponds to a projected separation of 7,511±22  AU . [9] The star is magnitude 10.62 [3] A third companion, component C, was discovered in 2007, located about 0.4″ from component B. [10] It has a visual magnitude of 15.6. [3]

Planetary system

In 2002, the Anglo-Australian Planet Search team announced the discovery of an extrasolar planet orbiting the star. [11] The discovery was independently confirmed by the Geneva Extrasolar Planet Search team. [7] In 2023, the inclination and true mass of HD 196050 b were determined via astrometry. [12]

The HD 196050 planetary system [12]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b 4.55+0.69
−0.72  MJ 		2.585+0.032
−0.035		3.813+0.026
−0.024		0.178±0.01141.0+10.0
−6.3 or 139.0+6.3
−10.0 ° 		—

See also

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References

  1. 1 2 3 4 5 6 7 Vallenari, 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 at VizieR.
  2. 1 2 3 4 5 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.
  3. 1 2 3 4 5 6 7 Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi: 10.1086/323920 , retrieved 2015-07-22
  4. 1 2 Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  5. 1 2 Chavero, C.; et al. (August 2019). "Emerging trends in metallicity and lithium properties of debris disc stars". Monthly Notices of the Royal Astronomical Society. 487 (3, p.3162-3177): 3162–3177. arXiv: 1905.12066 . Bibcode:2019MNRAS.487.3162C. doi: 10.1093/mnras/stz1496 . S2CID   168169634.
  6. 1 2 3 4 5 6 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 . Gaia DR2 record for this source at VizieR.
  7. 1 2 Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv: astro-ph/0310316 . Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. S2CID   5233877.
  8. ↑ "HD 196050". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-07-25.
  9. 1 2 3 4 Mugrauer, M.; et al. (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics. 440 (3): 1051–1060. arXiv: astro-ph/0507101 . Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297. S2CID   14065040.
  10. ↑ Roell, T.; et al. (June 2012). "Extrasolar planets in stellar multiple systems". Astronomy & Astrophysics. 542: 10. arXiv: 1204.4833 . Bibcode:2012A&A...542A..92R. doi:10.1051/0004-6361/201118051. S2CID   55755453. A92.
  11. ↑ Jones, Hugh R. A.; et al. (December 2002). "Extrasolar planets around HD 196050, HD 216437 and HD 160691". Monthly Notices of the Royal Astronomical Society. 337 (4): 1170–1178. arXiv: astro-ph/0206216 . Bibcode:2002MNRAS.337.1170J. doi: 10.1046/j.1365-8711.2002.05787.x . S2CID   119520409.
  12. 1 2 Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics . 23 (5): 055022. arXiv: 2303.12409 . Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.

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