Location of ι Phoenicis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 23 35 04.57082 |
| Declination | −42° 36′ 54.5409″ |
| Apparent magnitude (V) | 4.71 (4.70 - 4.75) |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A2VpSrCrEu |
| U−B color index | +0.07 |
| B−V color index | +0.08 |
| Variable type | α CVn |
| Astrometry | |
| Radial velocity (Rv) | +19.4 km/s |
| Proper motion (μ) | RA: +39.908 mas/yr Dec.: + 10.844 mas/yr |
| Parallax (π) | 12.8425 ± 0.3922 mas |
| Distance | 254 ± 8 ly (78 ± 2 pc) |
| Absolute magnitude (MV) | 0.28 |
| Details | |
| Mass | 2.23 M☉ |
| Radius | 5.07+0.51 −0.42 R☉ |
| Luminosity | 68.2±3.3 L☉ |
| Surface gravity (log g) | 3.89 cgs |
| Temperature | 7,370+320 −350 K |
| Metallicity | -0.01 dex |
| Rotational velocity (v sin i) | 23 km/s |
| Age | 573 Myr |
| Other designations | |
| ι Phe, CD−43°15420, FK5 1617, HD 221760, HIP 116389, HR 8949, SAO 231675, CCDM J23351-4237A, WDS J23351-4237A | |
| Database references | |
| SIMBAD | data |
ι Phoenicis, Latinized as Iota Phoenicis, is a binary star system in the southern constellation of Phoenix, near the constellation border with Grus. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude that fluctuates around 4.71. This system lies approximately 254 light years from the Sun based on parallax, and it is drifting further away with a radial velocity of +19.4 km/s.
The primary component is an Ap star on the main sequence with a stellar classification of A2VpSrCrEu, where the suffix notation indicates abnormal abundances of strontium, chromium, and europium in the stellar atmosphere. It is an Alpha Canum Venaticorum variable; its apparent magnitude varies from 4.70 down to 4.75 with a period of 12.5 days. A rotationally-modulated magnetic field has been measured, varying from −72±9 G to 57±9 G. It has an estimated rotation period of 5.98±0.06 d, although this is in need of further confirmation.
The proper motion companion is a magnitude 12.8 star at an angular separation of 6.7″.
References
- ^ 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.
- ^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ^ Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869, retrieved 2019-08-06.
- ^ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W. ISBN 9780598216885. LCCN 54001336.
- 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. Vizier catalog entry
- ^ David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607.
- Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778. Vizier catalog entry
- "iot Phe". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-06.
- ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 27 August 2024.
- Sikora, J.; et al. (March 2019), "A volume-limited survey of mCP stars within 100 pc II: rotational and magnetic properties", Monthly Notices of the Royal Astronomical Society, 483 (3): 3127–3145, arXiv:1811.05635, Bibcode:2019MNRAS.483.3127S, doi:10.1093/mnras/sty2895, S2CID 119415579.
- Frankowski, A.; et al. (March 2007), "Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data", Astronomy and Astrophysics, 464 (1): 377–392, arXiv:astro-ph/0612449, Bibcode:2007A&A...464..377F, doi:10.1051/0004-6361:20065526, S2CID 14010423
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