Astronomy:HD 149143

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Short description: Star in the constellation Ophiuchus
HD 149143 / Rosalíadecastro
Observation data
Equinox J2000.0]] (ICRS)
Constellation Ophiuchus
Right ascension  16h 32m 51.051s[1]
Declination +02° 05′ 05.38″[1]
Apparent magnitude (V) 7.89[2]
Characteristics
Spectral type G0 IV[2] or G3V[3]
B−V color index 0.680[2]
Astrometry
Radial velocity (Rv)12.104±0.0054[4] km/s
Proper motion (μ) RA: −9.240[5] mas/yr
Dec.: −86.678[5] mas/yr
Parallax (π)13.6279 ± 0.0247[5] mas
Distance239.3 ± 0.4 ly
(73.4 ± 0.1 pc)
Absolute magnitude (MV)3.87[2]
Details
Mass1.1±0.1[2] M☉
Radius1.302+0.083−0.041[6] R☉
Luminosity2.278±0.008[6] L☉
Surface gravity (log g)4.10[2] cgs
Temperature6,213[6] K
Metallicity [Fe/H]0.20±0.05[2] dex
Rotational velocity (v sin i)3.9[2] km/s
Age7.6±1.2[2] Gyr
Other designations
Rosalíadecastro, BD+02° 3127, HD 149143, HIP 81022, SAO 121678, PPM 162774[7]
Database references
SIMBAD149143 data
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HD 149143, also called Rosalíadecastro, is a star with a close orbiting exoplanet in the Ophiuchus constellation. Its apparent visual magnitude is 7.89[2] (a binocular object) and the absolute magnitude is 3.87.[8] The system is located at a distance of 239 light years from the Sun based on parallax measurements, and it is drifting further away with a radial velocity of 12 km/s.[4]

On December 17, 2019, as part of the IAU's NameExoWorlds project, the star HD 149143 was given the name Rosalíadecastro in honour of the Spain poet Rosalía de Castro, who was a significant figure of Galician culture and prominent Spanish writer, whose work often referenced the night and celestial objects. The exoplanet companion was named Riosar in honour of the Sar River in Spain that was present in much of the literary work of the Spanish author Rosalía de Castro.[9][10]

This is a slightly evolved star with a stellar classification of G0 that is overluminous for a high-metallicity G-type dwarf.[8] It has 1.1[2] times the mass of the Sun and 1.3[6] times the Sun's radius. The star has an estimated age of around 7.6 billion years and is spinning with a projected rotational velocity of 3.9 km/s.[2] It is radiating 2.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,213 K.[6]

Planetary system

HD 149143 b, the planet that orbits HD 149143, was discovered by the N2K Consortium during their search for short-period gas giant planets around metal-rich stars.[2] The planet was independently discovered by the Elodie metallicity-biased search for transiting Hot Jupiters.[8]

The HD 149143 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (Riosar) ≥1.33±0.15 MJ 0.053±0.0029 4.07182±0.00001 0.0167±0.004 — 1.05 RJ

See also

References

  1. ↑ 1.0 1.1 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. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Fischer, Debra A. et al. (2006). "The N2K Consortium. III. Short-Period Planets Orbiting HD 149143 and HD 109749". The Astrophysical Journal 637 (2): 1094–1101. doi:10.1086/498557. Bibcode: 2006ApJ...637.1094F. 
  3. ↑ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey 5. Bibcode: 1999MSS...C05....0H. 
  4. ↑ 4.0 4.1 Soubiran, C. et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics 616: A7. doi:10.1051/0004-6361/201832795. Bibcode: 2018A&A...616A...7S. 
  5. ↑ 5.0 5.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  6. ↑ 6.0 6.1 6.2 6.3 6.4 Johns, Daniel et al. (November 2018). "Revised Exoplanet Radii and Habitability Using Gaia Data Release 2". The Astrophysical Journal Supplement Series 239 (1): 14. doi:10.3847/1538-4365/aae5fb. 14. Bibcode: 2018ApJS..239...14J. 
  7. ↑ "HD 149143". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+149143. 
  8. ↑ 8.0 8.1 8.2 da Silva, R. et al. (2006). "Elodie metallicity-biased search for transiting Hot Jupiters I. Two Hot Jupiters orbiting the slightly evolved stars HD118203 and HD149143". Astronomy and Astrophysics 446 (2): 717–722. doi:10.1051/0004-6361:20054116. Bibcode: 2006A&A...446..717D. 
  9. ↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results. 
  10. ↑ "IAU Catalog of Star Names". http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt. 
  11. ↑ Ment, Kristo et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal 156 (5): 213. doi:10.3847/1538-3881/aae1f5. Bibcode: 2018AJ....156..213M. 

Coordinates: Sky map 16h 32m 51.0498s, +02° 05′ 05.395″



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