Astronomy:Mu Fornacis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 12m 54.46962s[1] |
| Declination | −30° 43′ 25.7732″[1] |
| Apparent magnitude (V) | 5.27[2] |
| Characteristics | |
| Spectral type | A0 V[3] |
| U−B color index | −0.06[2] |
| B−V color index | −0.02[2] |
| Astrometry | |
| Radial velocity (Rv) | 10.0±3.7[4] km/s |
| Proper motion (μ) | RA: +14.10[1] mas/yr Dec.: +6.85[1] mas/yr |
| Parallax (π) | 10.18 ± 0.24[1] mas |
| Distance | 320 ± 8 ly (98 ± 2 pc) |
| Absolute magnitude (MV) | +0.31[5] |
| Details | |
| Mass | 3.10[6] M☉ |
| Radius | 2.5[7] R☉ |
| Luminosity | 68.7[8] L☉ |
| Surface gravity (log g) | 3.71±0.14[6] cgs |
| Temperature | 11,745±399[6] K |
| Rotational velocity (v sin i) | 320[3] km/s |
| Age | 188[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
μ Fornacis (Latinised as Mu Fornacis) is the Bayer designation for a star in the southern constellation of Fornax. With an apparent visual magnitude of 5.27,[2] it is visible to the naked eye. The distance to this star, as determined by its annual parallax shift of 10.18 mas,[1] is around 320 light years.
This is an A-type main sequence star with a stellar classification of A0 V.[3] It is a Be star that displays "central quasi emission" (CQE) bumps in its spectrum due to a surrounding shell of material.[10] The star has an estimated 3.1[6] times the mass of the Sun and 2.5[7] times the Sun's radius. Mu Fornacis is spinning rapidly with a projected rotational velocity of 320 km/s[3] and is around 188 million years old.[6] It radiates 68.7[8] times the solar luminosity from its outer atmosphere at an effective temperature of 11,745 K.[6]
Mu Fornacis appears to be emitting an infrared excess at a wavelength of 22 μm, which could be due to an orbiting debris disk.[11]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 Cousins, A. W. J. (1973), "UBV photometry of some southern stars", Monthly Notes of the Astronomical Society of Southern Africa 32: 11, Bibcode: 1973MNSSA..32...11C.
- ↑ 3.0 3.1 3.2 3.3 Royer, F. et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, doi:10.1051/0004-6361:20065224, Bibcode: 2007A&A...463..671R.
- ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 7.0 7.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) – Third edition – Comments and statistics", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 8.0 8.1 McDonald, I. et al. (November 2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–357, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ "mu. For – Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=mu+For, retrieved 2017-01-24.
- ↑ Rivinius, Th. et al. (November 2006), "Bright Be-shell stars", Astronomy and Astrophysics 459 (1): 137–145, doi:10.1051/0004-6361:20053008, Bibcode: 2006A&A...459..137R
- ↑ Wu, Chao-Jian et al. (October 2013), "Bright 22 μm Excess Candidates from the Wise All-sky Catalog and the Hipparcos Main Catalog", The Astrophysical Journal Supplement 208 (2): 12, doi:10.1088/0067-0049/208/2/29, 29, Bibcode: 2013ApJS..208...29W.
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