RT Trianguli Australis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum Australe |
| Right ascension | 16h 34m 30.89188s[1] |
| Declination | −63° 08′ 00.8395″[1] |
| Apparent magnitude (V) | 9.43 - 10.18[2] |
| Characteristics | |
| Spectral type | F8:(R)-G2I-II[2] |
| Variable type | BL Her[2] |
| Astrometry | |
| Proper motion (μ) | RA: -4.00 ± 1.48[1] mas/yr Dec.: -14.25 ± 1.43[1] mas/yr |
| Parallax (π) | 1.26 ± 1.50[1] mas |
| Details[3] | |
| Maximum | |
| Luminosity | 200 L☉ |
| Temperature | 6,500 K |
| Minimum | |
| Luminosity | 138 L☉ |
| Temperature | 5,200 K |
| Mass | 0.48[4] M☉ |
| Radius | 9.4[4] R☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
RT Trianguli Australis, or RT TrA, is a BL Herculis variable (type II Cepheid) in the constellation of Triangulum Australe. It ranges between apparent magnitudes 9.4 and 10.2 over a period of 1.95 days.[2] It is unusual in that it is a carbon-rich type II Cepheid.[5]
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics. 474 (2): 653–64. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. - 1 2 3 4 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.
- ↑ Bergeat, J.; Knapik, A.; Rutily, B. (2002). "Carbon-rich giants in the HR diagram and their luminosity function". Astronomy and Astrophysics. 390 (3): 967. Bibcode:2002A&A...390..967B. doi:10.1051/0004-6361:20020525.
- 1 2 Petersen, Jørgen Otzen (1980). "Bump Masses and Radii of Bl-Herculis Variables". Space Science Reviews. 27 (3–4): 495. Bibcode:1980SSRv...27..495P. doi:10.1007/BF00168341.
- ↑ Wallerstein, George; Matt, Sean; Gonzalez, Guillermo (2000). "The Carbon Cepheid RT Trianguli Australis: Additional Evidence of Triple-α and CNO Cycling". Monthly Notices of the Royal Astronomical Society. 311 (2): 414–22. Bibcode:2000MNRAS.311..414W. doi:10.1046/j.1365-8711.2000.03064.x.
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