Astronomy:V395 Carinae
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Short description: Low-mass X-ray binary in Carina
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas/yr Dec.: +4.247[1] mas/yr |
| Parallax (π) | 0.0607 ± 0.0231[1] mas |
| 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 | |
| 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
- ↑ 1.0 1.1 1.2 1.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 "V* V395 Car". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+V395+Car.
- ↑ Dietrich, J. P. (1999). "The rotation speed of the companion star in V395 CAR (=2S0921-630)". Astronomy and Astrophysics 344: 101. Bibcode: 1999A&A...344..101S.
- ↑ 4.0 4.1 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. doi:10.1051/0004-6361:20077303. Bibcode: 2007A&A...469..807L.
- ↑ 5.0 5.1 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. 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. 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. doi:10.1086/523848. Bibcode: 2007ApJ...669L..85S.
- ↑ 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. doi:10.1093/pasj/psac086.
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