Zeta Virginis
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Virgo |
Right ascension | 13h 34m 41.591s[1] |
Declination | –00° 35′ 44.95″[1] |
Apparent magnitude (V) | +3.376[2] |
Characteristics | |
Spectral type | A3 V[3] |
U−B color index | +0.141[2] |
B−V color index | +0.114[2] |
Astrometry | |
Radial velocity (Rv) | –13.2[2] km/s |
Proper motion ( | RA: –280.48 ± 0.17[1] mas/yr Dec.: +49.05 ± 0.12[1] mas/yr |
Parallax ( | 44.03 ± 0.19 mas[1] |
Distance | 74.1 ± 0.3 ly (22.71 ± 0.10 pc) |
Absolute magnitude (MV) | 1.64±0.05[4] |
Details | |
Mass | 2.041±0.024[4] M☉ |
Radius | 2.079±0.025[5] R☉ |
Luminosity | 17.885±0.252[5] L☉ |
Surface gravity (log g) | 4.12 cgs |
Temperature | 8247±52[5] K |
Rotational velocity (v sin i) | 222[6] km/s |
Age | 0.51[7] Gyr |
Mass | 0.168+0.012 −0.016[4] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Zeta Virginis (
The two components are designated Zeta Virginis A (officially named Heze /ˈhiːziː/, a mid-20th-century name for the system)[8][9] and B.
Nomenclature
[edit]Zeta Virginis bore the name Heze in a 1951 publication, Atlas Coeli (Skalnate Pleso Atlas of the Heavens), by Czech astronomer Antonín Bečvář. Its origin is unknown.[5] In 2016, the I
In Chinese,
Properties
[edit]The primary,
The star was confirmed by Jan Ovidiu Tercu and Gabriel Cristian Neagu as a variable of DSCT type. The variability has an amplitude of 0.009 magnitudes and a main period of 0.097112 d. Other observed periods are 0.439, 1.069, 0.07691 and 0.07433 d. The variability was discovered during the datamining activity with the goal of increasing the student's investigative competences.[16]
In 2010, a low mass stellar companion was discovered - Zeta Virginis B. Though it has not been under observation for a sufficient length of time to determine accurate orbital elements, it is estimated to be orbiting at an average separation of at least 24.9
References
[edit]- ^ a b c d e 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. S2CID 18759600. Vizier catalog entry
- ^ a b c d Hipparcos star Zeta Virginis Archived January 2, 2013, at the Wayback Machine
- ^ The stars of Virgo Alcyone Ephemeris
- ^ a b c d Hinkley, Sasha (March 2010), "Discovery and Characterization of a Faint Stellar Companion to the A3V Star
ζ Virginis", The Astrophysical Journal, 712 (1): 421–428, arXiv:1002.1074, Bibcode:2010ApJ...712..421H, doi:10.1088/0004-637X/712/1/421, S2CID 118468089 - ^ a b c d e f g Kaler, James B., "HEZE (Zeta Virginis)", Stars, University of Illinois, retrieved 2018-06-24
- ^ 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, S2CID 18475298 Data catalog: Bibcode:2006yCat..34630671R
- ^ a b Su, K. Y. L. (December 2006), "Debris Disk Evolution around A Stars", The Astrophysical Journal, 653 (1): 675–689, arXiv:astro-ph/0608563, Bibcode:2006ApJ...653..675S, doi:10.1086/508649, S2CID 14116473
- ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
- ^ a b "Naming Stars". IAU.org. Retrieved 18 June 2018.
- ^ Hessman, F. V.; Dhillon, V. S.; Winget, D. E.; Schreiber, M. R.; Horne, K.; Marsh, T. R.; Guenther, E.; Schwope, A.; Heber, U. (2010). "On the naming convention used for multiple star systems and extrasolar planets". arXiv:1012.0707 [astro-ph.SR].
- ^ "I
AU Working Group on Star Names (WGSN)". Retrieved 22 May 2016. - ^ "WG Triennial Report (2015-2018) - Star Names" (PDF). p. 5. Retrieved 2018-07-14.
- ^ (in Chinese)
中國 星座 神話 , written by陳 久金 . Published by台灣 書房 出版 有限 公司 , 2005, ISBN 978-986-7332-25-7. - ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy)
天文 教育 資 訊網 2006年 6月 27日 - ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on 2013-12-03, retrieved 2012-01-16
- ^ "VSX : Detail for zet vir".
External links
[edit]- Boyajian, Tabetha S. et al., 2012. Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars. The Astrophysical Journal vol 746 (1) p. 101 [1]