Rho Fornacis
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03h 47m 56.04033s[1] |
| Declination | −30° 10′ 4.3781″[1] |
| Apparent magnitude (V) | +5.452[2] |
| Characteristics | |
| Spectral type | G6III[3] |
| B−V color index | 0.98[3] |
| Astrometry | |
| Radial velocity (Rv) | 51.03±0.12[1] km/s |
| Proper motion (μ) | RA: +25.932 mas/yr[1] Dec.: −231.4 mas/yr[1] |
| Parallax (π) | 11.5326 ± 0.0512 mas[1] |
| Distance | 283 ± 1 ly (86.7 ± 0.4 pc) |
| Details | |
| Mass | 1.16±0.10 – 1.24±0.11[4] M☉ |
| Radius | 10.192±0.201[5] R☉ |
| Luminosity | 50.28±1.10[5] L☉ |
| Surface gravity (log g) | 2.43±0.06[5] cgs |
| Temperature | 4,815±52[5] K |
| Metallicity [Fe/H] | −0.34±0.02[5] dex |
| Age | 3.9±1.0 – 4.67±1.03[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho Fornacis (ρ For)[3] is a star of apparent magnitude +5.45[2] in the constellation of Fornax, the furnace. Its distance from Earth, according to stellar parallax measurements taken by the Gaia spacecraft, is 283 light-years.[1]
Rho Fornacis is a yellow-orange giant of spectral type G6III[3][6] with an effective temperature of 4884 K.[7] It is similar, though somewhat hotter, than β Fornacis and π Fornacis, stars also in Fornax. The diameter of Rho Fornacis is 9.9 times larger than the solar diameter but its mass is barely 1% greater than that of the Sun. Its age is estimated at 5180 ± 3170 million years.
Rho Fornacis is a thick disk star, unlike most stars in our environment. Arcturus (α Boötis) and ε Fornacis, the latter in this same constellation, are examples of thick disk stars. The eccentricity of its orbit around the Galactic Center (e = 0.56) is considerably greater than that of the Sun (e = 0.16), star of the thin disk.[8] Consequently, it shows a low metallicity—relative abundance of elements heavier than helium—, less than half that of the solar ([Fe/H] = -0 ,35).[7] Elements such as aluminum, calcium and sodium are equally deficient. As in other similar stars, the oxygen/iron ratio is higher than in the Sun ([O/H] = 0.33).[9]
References
[edit]- ^ a b c d e f 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.
- ^ a b Paunzen, E. (2015-08-01). "A new catalogue of Strömgren-Crawford uvbyβ photometry". Astronomy and Astrophysics. 580: A23. Bibcode:2015A&A...580A..23P. doi:10.1051/0004-6361/201526413. ISSN 0004-6361. Rho Fornacis' database entry at VizieR.
- ^ a b c d e =submit+id rho For -- Variable Star (SIMBAD)
- ^ a b Gallenne, A.; Pietrzyński, G.; Graczyk, D.; Nardetto, N.; Mérand, A.; Kervella, P.; Gieren, W.; Villanova, S.; Mennickent, R. E.; Pilecki, B. (2018-08-01). "Fundamental properties of red-clump stars from long-baseline H-band interferometry". Astronomy & Astrophysics. 616: A68. arXiv:1806.09572. Bibcode:2018A&A...616A..68G. doi:10.1051/0004-6361/201833341. ISSN 0004-6361.
- ^ a b c d e Soubiran, C.; Creevey, O. L.; Lagarde, N.; Brouillet, N.; Jofré, P.; Casamiquela, L.; Heiter, U.; Aguilera-Gómez, C.; Vitali, S.; Worley, C.; de Brito Silva, D. (2024-02-01). "Gaia FGK benchmark stars: Fundamental Teff and log g of the third version". Astronomy and Astrophysics. 682: A145. arXiv:2310.11302. Bibcode:2024A&A...682A.145S. doi:10.1051/0004-6361/202347136. ISSN 0004-6361. Rho Fornacis' database entry at VizieR.
- ^ "Rho Fornacis (Alcyone)". March 4, 2016. Archived from the original on 2016-03-04. Retrieved March 27, 2012.
- ^ a b da Silva, L.; Girardi, L. ; Pasquini, L. ; Setiawan, J.; von der Lühe, O.; de Medeiros, J. R. ; Hatzes, A. ; Döllinger, M.P.; Weiss, A. (1999). (2007). "Basic physical parameters of a selected sample of evolved stars". Astronomy & Astrophysics. 458 (2): 609. arXiv:astro-ph/0608160. Bibcode:2006A&A...458..609D. doi:10.1051/0004-6361:20065105. pp. 609-623.
{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link) - ^ Rho Fornacis (Ashland Astronomy Studio)
- ^ Alves-Brito, A.; Melendez, J.; Asplund , M. ; Ramirez, I.; Yong, D. (1999). (2010). Chemical similarities between the Galactic bulge and local thick disk red giants: O, Na, Mg, Al, Si, Ca, and Ti. Astronomy and Astrophysics. Vol. 513. pp. A35. arXiv:1001.2521. Bibcode:2010A&A...513A..35A. doi:10.1051/0004-6361/200913444. A3.
{{cite book}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
