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HD 63454

(Redirected from HD 63454 b)

HD 63454, formally named Ceibo, is a star located in the southern circumpolar constellation Chamaeleon near the border with Mensa. To see the star, one needs a small telescope because it has an apparent magnitude of 9.36,[3] which is below the limit for naked eye visibility. The object is located relatively close at a distance of 123 light-years based on Gaia DR3 parallax measurements[2] but is receding with a heliocentric radial velocity of 33.8 km/s.[13] At its current distance, HD 63454's brightness is diminished by two tenths of a magnitude due to interstellar dust.[14] It has an absolute magnitude of +6.68.[1]

HD 63454 / Ceibo
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon[1]
Right ascension 07h 39m 21.85290s[2]
Declination −78° 16′ 44.3078″[2]
Apparent magnitude (V) 9.36±0.02[3]
Characteristics
Spectral type K3 V(k)[4]
U−B color index +0.98[5]
B−V color index +1.06[3]
Astrometry
Radial velocity (Rv)+33.61±0.15[2] km/s
Proper motion (μ) RA: −19.556 mas/yr[2]
Dec.: −39.926 mas/yr[2]
Parallax (π)26.5541±0.0114 mas[2]
Distance122.83 ± 0.05 ly
(37.66 ± 0.02 pc)
Absolute magnitude (MV)+6.68[1]
Details
Mass0.80[6] M☉
Radius0.80±0.04[7] R☉
Luminosity0.287±0.005[2] L☉
Surface gravity (log g)4.52±0.16[8] cgs
Temperature4,840±66[8] K
Metallicity [Fe/H]0.00±0.06[9] dex
Rotation8.28 days[10]
Rotational velocity (v sin i)2.6[11] km/s
Age1.0[6] Gyr
Other designations
Ceibo, CD−77°298, CPD−77°324, HD 63454, HIP 37284, TYC 9385-1045-1[12]
Database references
SIMBADdata
Exoplanet Archivedata

Properties

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HD 63454 has a stellar classification of K3 V(k),[4] indicating that it is a K-type main-sequence star with some infilling of the calcium K and H lines.[15] It has 80% the mass of the Sun[6] and 80% the Sun's radius.[7] It radiates 28.7% the luminosity of the Sun[2] from its photosphere at an effective temperature of 4,840 K,[8] giving it an orange hue. HD 63454 has a solar metallicity[9] and is estimated to be about one billion years old,[6] a third the age of the Sun. It spins modestly with a projected rotational velocity of 2.6 km/s.[11]

Planetary system

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On Valentine’s Day 2005, a hot Jupiter HD 63454 b was found by Claire Moutou, Michel Mayor, and François Bouchy using the radial velocity method.[13]

After the 2019 IAU100 NameExoWorlds campaign, the International Astronomical Union, approved the names proposed from Uruguay: Ceibo for the star and Ibirapitá for the planet, respectively after the native Uruguayan tree species Erythrina crista-galli and Peltophorum dubium.[16]

These names were announced on 17 December 2019, at a press conference of the IAU in Paris, together with other 111 sets of exoplanets and host stars.[17] Ceibo and Ibirapitá were proposed by Adrián Basedas, from the Astronomical Observatory of Liceo Nº9, Montevideo, Uruguay, who won the national contest "Nombra Tu Exoplaneta",[18] organized in Uruguay, to name HD 63454 and HD 63454 b.

The HD 63454 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination
(°)		 Radius
Ibirapitá ≥0.25±0.01[19] MJ 0.036[13] 2.818049±0.000071[20] 0.0[13] — ~1.10[20] RJ

See also

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References

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  1. 1 2 3 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 9 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.
  3. 1 2 3 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.
  4. 1 2 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  5. ↑ Paunzen, E. (May 2022). "Catalogue of stars measured in the Geneva seven-colour photometric system". Astronomy & Astrophysics. 661: A89. arXiv:2111.04810. Bibcode:2022A&A...661A..89P. doi:10.1051/0004-6361/202142355. eISSN 1432-0746. ISSN 0004-6361.
  6. 1 2 3 4 Safsten, Emily D.; Dawson, Rebekah I.; Wolfgang, Angie (2020). "Nature Versus Nurture: A Bayesian Framework for Assessing Apparent Correlations between Planetary Orbital Properties and Stellar Ages". The Astronomical Journal. 160 (5): 214. arXiv:2009.02357. Bibcode:2020AJ....160..214S. doi:10.3847/1538-3881/abb536.
  7. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
  8. 1 2 3 Sousa, S. G.; Santos, N. C.; Mayor, M.; Udry, S.; Casagrande, L.; Israelian, G.; Pepe, F.; Queloz, D.; Monteiro, M. J. P. F. G. (4 June 2008). "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program". Astronomy & Astrophysics. 487 (1): 373–381. arXiv:0805.4826. Bibcode:2008A&A...487..373S. doi:10.1051/0004-6361:200809698. eISSN 1432-0746. ISSN 0004-6361.
  9. 1 2 Ramírez, I.; Fish, J. R.; Lambert, D. L.; Allende Prieto, C. (13 August 2012). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal. 756 (1): 46. arXiv:1207.0499. Bibcode:2012ApJ...756...46R. doi:10.1088/0004-637X/756/1/46. eISSN 1538-4357. ISSN 0004-637X.
  10. ↑ Colman, Isabel L.; Angus, Ruth; David, Trevor; Curtis, Jason; Hattori, Soichiro; Lu, Yuxi (Lucy) (2024). "Methods for the Detection of Stellar Rotation Periods in Individual TESS Sectors and Results from the Prime Mission". The Astronomical Journal. 167 (5): 189. arXiv:2402.14954. Bibcode:2024AJ....167..189C. doi:10.3847/1538-3881/ad2c86.
  11. 1 2 Soto, M. G.; Jenkins, J. S. (July 2018). "Spectroscopic Parameters and Atmospheric Chemistries of Stars (SPECIES). I. Code description and dwarf stars catalogue". Astronomy & Astrophysics. 615: A76. arXiv:1801.09698. Bibcode:2018A&A...615A..76S. doi:10.1051/0004-6361/201731533. eISSN 1432-0746. ISSN 0004-6361.
  12. ↑ "HD 63454". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 January 2023.
  13. 1 2 3 4 Moutou, C.; Mayor, M.; Bouchy, F.; Lovis, C.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Benz, W.; Lo Curto, G.; Naef, D.; Ségransan, D.; Sivan, J.-P. (22 July 2005). "The HARPS search for southern extra-solar planets. IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy & Astrophysics. 439 (1): 367–373. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826. eISSN 1432-0746. ISSN 0004-6361.
  14. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
  15. ↑ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. S2CID 119417105.
  16. ↑ "IAU100 NameExoWorlds: Approved names".
  17. ↑ "IAU100 NameExoWorlds National campaigns".
  18. ↑ "Nombra Tu Exoplaneta Uruguay". 17 December 2019.
  19. ↑ Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (3 March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal. 153 (3): 136. arXiv:1609.04389. Bibcode:2017AJ....153..136S. doi:10.3847/1538-3881/aa5df3. eISSN 1538-3881.
  20. 1 2 Kane, Stephen R.; Dragomir, Diana; Ciardi, David R.; Lee, Jae-Woo; Lo Curto, Gaspare; Lovis, Christophe; Naef, Dominique; Mahadevan, Suvrath; Pilyavsky, Genady; Udry, Stephane; Wang, Xuesong; Wright, Jason (3 August 2011). "Stellar Variability of the Exoplanet Hosting Star HD 63454". The Astrophysical Journal. 737 (2): 58. arXiv:1105.6131. Bibcode:2011ApJ...737...58K. doi:10.1088/0004-637X/737/2/58. eISSN 1538-4357. ISSN 0004-637X.
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