V395 Carinae

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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] °
Details
Donor Star [6]
Mass 0.35 ± 0.03  M☉
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. [7]

References

  1. 1 2 3 4 5 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.
  2. 1 2 3 "V* V395 Car". SIMBAD . Centre de données astronomiques de Strasbourg.
  3. ↑ 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.
  4. 1 2 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.
  5. 1 2 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 .
  6. ↑ 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.
  7. ↑ 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.
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