Psi1 Lupi
| Observation data Epoch {{{epoch}}} Equinox | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 39m 45.9789s |
| Declination | –34° 24′ 42.934″ |
| Apparent magnitude (V) | +4.67 |
| Characteristics | |
| Spectral type | G8 III |
| Astrometry | |
| Distance | 205.38 ly (63 [1] pc) |
| Absolute magnitude (MV) | +0.24[2] |
| Details | |
| Mass | 2.42[2] M☉ |
| Radius | 13[1] R☉ |
| Temperature | 4,930[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Psi1 Lupi (ψ1 Lupi) is an orange 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.[1]
References
- 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
| ||||||||||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Thursday, February 26, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.