Psi1 Lupi
- For other star systems with this Bayer designation, see ψ Lupi.
| Observation data Epoch 2000 Equinox 2000 | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 39m 45.97886s[1] |
| Declination | –34° 24′ 42.9065″[1] |
| Apparent magnitude (V) | +4.663[2] |
| Characteristics | |
| Spectral type | G8/K0 III[3] |
| Astrometry | |
| Parallax (π) | 14.85 ± 0.28[1] mas |
| Distance | 205.38 ly (63 [4] pc) |
| Absolute magnitude (MV) | +0.24[5] |
| Details | |
| Mass | 2.42[5] M☉ |
| Radius | 13[4] R☉ |
| Luminosity | 72.92[6] L☉ |
| Surface gravity (log g) | 3.28[7] cgs |
| Temperature | 4,930[4] K |
| Metallicity [Fe/H] | −0.34[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
Psi1 Lupi (ψ1 Lupi) is an red clump[2] giant star located 205 light years away from the Sun, in the Lupus constellation. The star is surrounded by a cold circumstellar envelope, hinted at by the anomaly of the small observed power of the doublet Mg II emission at 2800 angstrom. The absorption cores on the peaks of the emission profiles Mg II k and h are mainly of interstellar origin and only partly due to self-absorption in the star's chromosphere.[4]
References
- 1 2 3 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 Alves, David R. (2000). "K-Band Calibration of the Red Clump Luminosity". The Astrophysical Journal. 539 (2): 732. Bibcode:2000ApJ...539..732A. doi:10.1086/309278.
- ↑ Houk, N. (1982). "Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0". Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982MSS...C03....0H.
- 1 2 3 4 Gurzadian, G. A.; Kondo, Y.; Ohanesyan, J. B.; Terzian, Yervant; Perez, Mario R. (1991). "A cool giant with a circumstellar cloud". Astrophysics and Space Science. 176 (1): 61–68. Bibcode:1991Ap&SS.176...61G. doi:10.1007/BF00643077.
- 1 2 Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics, 361: 614–628, Bibcode:2000A&A...361..614P
- ↑ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.
- 1 2 Adibekyan, V. Zh.; Benamati, L.; Santos, N. C.; Alves, S.; Lovis, C.; Udry, S.; Israelian, G.; Sousa, S. G.; Tsantaki, M.; Mortier, A.; Sozzetti, A.; De Medeiros, J. R. (2015). "Chemical abundances and kinematics of 257 G-, K-type field giants. Setting a base for further analysis of giant-planet properties orbiting evolved stars". Monthly Notices of the Royal Astronomical Society. 450 (2): 1900. Bibcode:2015MNRAS.450.1900A. doi:10.1093/mnras/stv716.
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