HD 150136
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 16h 41m 20.42426s[1] |
| Declination | −48° 45′ 46.7490″[1] |
| Apparent magnitude (V) | 5.54[2] |
| Characteristics | |
| Spectral type | O3.5 If* + O6V + O6.5-7V[3] |
| U−B color index | −0.76[2] |
| B−V color index | +0.20[2] |
| Astrometry | |
| Radial velocity (Rv) | −27[4] km/s |
| Proper motion (μ) | RA: +9.73[1] mas/yr Dec.: −7.31[1] mas/yr |
| Parallax (π) | −3.11 ± 2.94[1] mas |
| Distance | 4,310 ± 390 ly (1,320 ± 120 pc)[3] ly |
| Orbit[4] | |
| Period (P) | 2.6761 d |
| Eccentricity (e) | 0.04±0.06 |
| Semi-amplitude (K1) (primary) | 111 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 150136 is a triple system of massive O-type stars[3] in the southern constellation of Ara. It consists of a double-lined spectroscopic binary[4] with a more distant tertiary companion. The last star is orbiting the other two with a period of 8.2 years, an eccentricity of 0.73, and an inclination of 108°. The estimated masses of the stars are 63±10, 40±6, and 33±12 times the mass of the Sun. This system contains the brightest stars in the NGC 6193 cluster.[3]
References
- 1 2 3 4 5 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 3 Schild, R. E.; et al. (April 1983), "UBV photometry for southern OB stars", Astrophysical Journal Supplement Series 51: 321–336, Bibcode:1983ApJS...51..321S, doi:10.1086/190852.
- 1 2 3 4 Sana, H.; et al. (May 2013), "Three-dimensional orbits of the triple-O stellar system HD 150136", Astronomy & Astrophysics 553: 5, Bibcode:2013A&A...553A.131S, doi:10.1051/0004-6361/201321189, A131
- 1 2 3 Pourbaix, D.; et al. (2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy & Astrophysics 424 (2): 727, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213.
External links
- Leutenegger, Maurice A.; et al. (August 2010), "Modeling Broadband X-ray Absorption of Massive Star Winds", The Astrophysical Journal 719 (2): 1767−1774, Bibcode:2010ApJ...719.1767L, doi:10.1088/0004-637X/719/2/1767.
- HR 6187
- Image HD 150136
- CCDM J16413-4846
- NGC 6193
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