V395 Carinae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 09h 22m 34.67620s[1] |
| Declination | −63° 17′ 41.3558″[1] |
| Apparent magnitude (V) | 15.3[2] |
| Characteristics | |
| Spectral type | K0III[3] |
| U−B color index | -0.5[4] |
| B−V color index | +0.6[4] |
| Variable type | X-ray binary |
| Astrometry | |
| Radial velocity (Rv) | +51.6[2] km/s |
| Proper motion (μ) | RA: −3.163 mas/yr[1] Dec.: +4.247 mas/yr[1] |
| Parallax (π) | 0.0607±0.0231 mas[1] |
| Distance | approx. 50,000 ly (approx. 16,000 pc) |
| Orbit | |
| Period (P) | 9.0026 ± 0.0001 d[5] |
| Inclination (i) | 82.2 ± 1.0[5]° |
| Semi-amplitude (K2) (secondary) | 99.1 ± 3.1 [6] km/s |
| Details | |
| Donor Star[7] | |
| Mass | 0.35 ± 0.03 M☉ |
| Rotational velocity (v sin i) | 32.9 ± 0.8 km/s |
| Neutron star | |
| Mass | 1.44 ± 0.10 M☉ |
| Other designations | |
| V395 Car, 2S 0921-630[2] | |
| Database references | |
| SIMBAD | data |
V395 Carinae, also known as 2S 0921-630, is a low-mass X-ray binary in the constellation Carina. X-ray observations have revealed that it has an extended accretion disk corona.[8]
References
- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c "V* V395 Car". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ Dietrich, J. P. (1999). "The rotation speed of the companion star in V395 CAR (=2S0921-630)". Astronomy and Astrophysics. 344: 101. arXiv:astro-ph/9812440. Bibcode:1999A&A...344..101S.
- ^ a b Liu, Q. Z.; van Paradijs, J.; van den Heuvel, E. P. J. (July 2007). "A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth edition)". Astronomy & Astrophysics. 469 (2): 807–810. arXiv:0707.0544. Bibcode:2007A&A...469..807L. doi:10.1051/0004-6361:20077303.
- ^ a b Ashcraft, T. A.; Hynes, R. I.; Robinson, E. L. (21 July 2012). "Optical and infrared light curves of the eclipsing X-ray binary V395 Car = 2S 0921−630: Optical and infrared light curves of V395 Car". Monthly Notices of the Royal Astronomical Society. 424 (1): 620–624. arXiv:1206.0032. doi:10.1111/j.1365-2966.2012.21241.x.
- ^ Jonker, P. G.; Steeghs, D.; Nelemans, G.; van der Klis, M. (January 2005). "The radial velocity of the companion star in the low-mass X-ray binary 2S 0921-630: limits on the mass of the compact object". Monthly Notices of the Royal Astronomical Society. 356 (2): 621–626. arXiv:astro-ph/0410151. doi:10.1111/j.1365-2966.2004.08476.x.
- ^ Steeghs, D.; Jonker, P. G. (16 October 2007). "On the Mass of the Neutron Star in V395 Carinae/2S 0921-630". The Astrophysical Journal. 669 (2): L85–L88. arXiv:0707.2067. Bibcode:2007ApJ...669L..85S. doi:10.1086/523848.
- ^ Yoneyama, Tomokage; Dotani, Tadayasu (2022-10-19). "X-ray spectroscopy of the accretion disk corona source 2S 0921−630 with Suzaku archival data". Publications of the Astronomical Society of Japan. 75: 30–36. arXiv:2210.10792. doi:10.1093/pasj/psac086.