33 Arietis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 40m 41.07563s[1] |
| Declination | +27° 03′ 39.4040″[1] |
| Apparent magnitude (V) | +5.33[2] |
| Characteristics | |
| Spectral type | A3 V[3] |
| U−B color index | +0.13[4] |
| B−V color index | +0.09[4] |
| Astrometry | |
| Radial velocity (Rv) | +21.0[5] km/s |
| Proper motion (μ) | RA: +64.83[1] mas/yr Dec.: -26.05[1] mas/yr |
| Parallax (π) | 14.09 ± 0.32[1] mas |
| Distance | 231 ± 5 ly (71 ± 2 pc) |
| Details | |
| Rotational velocity (v sin i) | 107[6] km/s |
| Other designations | |
33 Arietis is the Flamsteed designation for a binary star[2] in the northern constellation of Aries. The combined apparent magnitude of 5.33[2] is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 14.09 mas,[1] the distance to this system is approximately 231 light-years (71 parsecs).
The primary component is an A-type main sequence star with a magnitude of 5.40 and a stellar classification of A3 V. It has a magnitude 8.40 companion at an angular separation of 28.6 arcseconds. An excess of infrared emission suggests the presence of circumstellar dust in this system. In the 24μm band, this debris disk has a mean temperature of 815 K, which puts it at a radius of 0.85 astronomical units (AU) from the primary star. Excess emission appears in the 70μm band, which has a temperature of 103 K and a radius out to 42 AU.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- ↑ 2.0 2.1 2.2 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ↑ 4.0 4.1 Osawa, K.; Hata, S. (1960), "Three colour photometry of B8-A2 stars", Annals of the Tokyo Astronomical Observatory 6: 148, Bibcode:1960AnTok...6..148O.
- ↑ Palmer, D. R. et al. (1968), "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars", Royal Observatory Bulletin 135: 385, Bibcode:1968RGOB..135..385P.
- ↑ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
- ↑ "33 Ari -- Star in double system", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-08-15.
- ↑ Trilling, D. E. et al. (April 2007), "Debris disks in main-sequence binary systems", The Astrophysical Journal 658 (2): 1264–1288, arXiv:astro-ph/0612029, Bibcode:2007ApJ...658.1289T, doi:10.1086/511668.
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