ZZ Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 13h 56m 09.51770s[1] |
| Declination | +25° 55′ 07.3579″[1] |
| Apparent magnitude (V) | 6.785[2] |
| Characteristics | |
| Spectral type | F2 IV-V + F2 IV-V[3] |
| B−V color index | +0.36[4] |
| Variable type | Algol[5] |
| Astrometry | |
| Radial velocity (Rv) | -29.50[6] km/s |
| Proper motion (μ) | RA: -96.52[1] mas/yr Dec.: -5.59[1] mas/yr |
| Parallax (π) | 9.59 ± 0.51[1] mas |
| Distance | 340 ± 20 ly (104 ± 6 pc) |
| Absolute bolometric magnitude (Mbol) | 2.17 / 2.30[3] |
| Orbit[3] | |
| Period (P) | 4.991744 d |
| Inclination (i) | 88.6 ± 0.1° |
| Semi-amplitude (K1) (primary) | 93.7 ± 2.1 km/s |
| Semi-amplitude (K2) (secondary) | 94.0 ± 2.1 km/s |
| Details | |
| ZZ Boo A | |
| Mass | 1.71 ± 0.06[3] M☉ |
| Radius | 2.28 ± 0.06[3] R☉ |
| Luminosity | 10.7[3] L☉ |
| Surface gravity (log g) | 3.72 ± 0.10[7] cgs |
| Temperature | 6860 ± 20[7] K |
| Metallicity [Fe/H] | −0.10 ± 0.08[7] dex |
| Rotational velocity (v sin i) | 11.9 ± 0.4[7] km/s |
| ZZ Boo B | |
| Mass | 1.70 ± 0.06[3] M☉ |
| Radius | 2.15 ± 0.06[3] R☉ |
| Luminosity | 9.95[3] L☉ |
| Surface gravity (log g) | 3.84 ± 0.10[7] cgs |
| Temperature | 6930 ± 20[7] K |
| Rotational velocity (v sin i) | 19.3 ± 0.8[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
ZZ Boötis is a star system in the constellation Boötes. It varies from magnitude 6.79 to 7.44 over 5 days.[8] Based on its Hipparcos parallax, it is about 340 light-years (106 parsecs) away.[1]
ZZ Boötis is a binary star system, specifically an eclipsing binary.[8] In these, the two components pass in front of each other while orbiting, blocking some of the other star's light. The component stars appear to be of almost equal mass, differing by only 3%.[4]
References
- 1 2 3 4 5 6 Van Leeuwen, F. (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.
- 1 2 "ZZ Boo". SIMBAD. Centre de données astronomiques de Strasbourg.
- 1 2 3 4 5 6 7 8 9 Cester, B.; Giuricin, G.; Mardirossian, F.; Mezzetti, M. (1978). "Revised spectrographic and photometric elements of ZZ Boo". Astronomy and Astrophysics Supplement Series. 32: 347–350. Bibcode:1978A&AS...32..347C.
- 1 2 Popper, D. M. (1983). "The F-type eclipsing binaries ZZ Bootis, CW Eridani, and BK Pegasi". Astronomical Journal. 88: 1242–56. Bibcode:1983AJ.....88.1242P. doi:10.1086/113415. ISSN 0004-6256.
- ↑ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ↑ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727. arXiv:astro-ph/0406573. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213.
- 1 2 3 4 5 6 7 Kang, Young-Woon; Yushchenko, Alexander; Hong, Kyengsoo; Kim, Sungeun; Yushchenko, Volodymyr (2012). "Chemical Composition of the Components of Eclipsing Binary Star ZZ Bootis". The Astronomical Journal. 144 (2): 35–45. Bibcode:2012AJ....144...35K. doi:10.1088/0004-6256/144/2/35.
- 1 2 Watson, Christopher (4 January 2010). "ZZ Boötis". AAVSO Website. American Association of Variable Star Observers. Retrieved 5 August 2014.
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