Rho Telescopii (ρ Tel, ρ Telescopii) is the Bayer designation for an astrometric binary[9] star system in the southern constellation of Telescopium. It is visible to the naked eye, with an apparent visual magnitude of +5.17.[2] Based upon an annual parallax shift of 17.63 mas as measured from Earth,[1] it is located approximately 185 light years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 19h 06m 19.95580s[1] |
| Declination | −52° 20′ 27.2757″[1] |
| Apparent magnitude (V) | +5.17[2] |
| Characteristics | |
| Spectral type | F6 V[3] |
| B−V color index | +0.53[2] |
| Astrometry | |
| Radial velocity (Rv) | +0.1±0.7[4] km/s |
| Proper motion (μ) | RA: +32.47[1] mas/yr Dec.: −115.24[1] mas/yr |
| Parallax (π) | 17.63 ± 0.59 mas[1] |
| Distance | 185 ± 6 ly (57 ± 2 pc) |
| Absolute magnitude (MV) | 1.69[5] |
| Details | |
| Mass | 1.97[4] M☉ |
| Luminosity | 25.6[6] L☉ |
| Surface gravity (log g) | 3.51[4] cgs |
| Temperature | 6,303±80[4] K |
| Metallicity [Fe/H] | +0.01[7] dex |
| Rotational velocity (v sin i) | 68.5±4.0[5] km/s |
| Age | 1.30[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This appears to be a single-lined spectroscopic binary as it displays radial velocity variation with a period of 1.7 days.[9] The visible component is an F-type main sequence star with a stellar classification of F6 V.[3] It has about double the mass of the Sun and is radiating 25.6[6] times the solar luminosity from its photosphere at an effective temperature of 6,303 K.[4] The star is a bright X-ray source with a luminosity of 65.76×1029 ergs s−1.[10]
Relative to neighboring stars, Rho Telescopii has a peculiar velocity of 17.2 km s−1.[11] It may be a member of the Tucana-Horologium association.[12]
| Age | Source |
|---|---|
| 1.5±0.2 Myr | Tetzlaff et al. (2011)[11] |
| 30 Myr | Lagrange et al. (2013)[9] |
| 0.20 Gyr | Ballering et al. (2013)[13] |
| 1.30 Gyr | Casagrande et al. (2011)[4] |
References
edit- ^ a b c d e f van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600 Note: see VizieR catalogue I/311.
- ^ a b c Johnson, H. L.; et al. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
- ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H
- ^ a b c d e f g Casagrande, L.; et al. (2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy & Astrophysics, 530 (A138): 21, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276, S2CID 56118016.
- ^ a b Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
- ^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ Maldonado, J.; et al. (May 2012), "Metallicity of solar-type stars with debris discs and planets", Astronomy and Astrophysics, 541: A40, arXiv:1202.5884, Bibcode:2012A&A...541A..40M, doi:10.1051/0004-6361/201218800, S2CID 46328823.
- ^ "rho Tel – Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-03-28
- ^ a b c Lagrange, A.-M.; et al. (November 2013), "Planets around stars in young nearby associations. Radial velocity searches: a feasibility study and first results", Astronomy & Astrophysics, 559: 20, arXiv:1304.5505, Bibcode:2013A&A...559A..83L, doi:10.1051/0004-6361/201220770, S2CID 119243209, A83.
- ^ Makarov, Valeri V. (October 2003), "The 100 Brightest X-Ray Stars within 50 Parsecs of the Sun", The Astronomical Journal, 126 (4): 1996–2008, Bibcode:2003AJ....126.1996M, doi:10.1086/378164.
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873
- ^ Fernández, D.; Figueras, F.; Torra, J. (March 2008), "On the kinematic evolution of young local associations and the Scorpius-Centaurus complex", Astronomy and Astrophysics, 480 (3): 735–751, arXiv:0801.0605, Bibcode:2008A&A...480..735F, doi:10.1051/0004-6361:20077720, S2CID 5242901
- ^ Ballering, Nicholas P.; et al. (September 2013), "A Trend between Cold Debris Disk Temperature and Stellar Type: Implications for the Formation and Evolution of Wide-orbit Planets", The Astrophysical Journal, 775 (1): 14, arXiv:1308.2223, Bibcode:2013ApJ...775...55B, doi:10.1088/0004-637X/775/1/55, S2CID 119113700, 55