GG Carinae
| Observation data Epoch J2000 Equinox J2000 | ||
|---|---|---|
| Constellation | Carina | |
| Right ascension | 10h 55m 58.915s[2] | |
| Declination | −60° 23′ 33.44″[2] | |
| Apparent magnitude (V) | 8.67[3] (8.4 to 8.9)[4] | |
| Characteristics | ||
| Evolutionary stage | Supergiant | |
| Spectral type | B0/2eq[5] | |
| B−V color index | 0.552±0.025[3] | |
| Variable type | Unique[4] | |
| Absolute magnitude (MV) | −6.21[6] | |
Semi-amplitude (K1)(primary) | 48.57+2.04 −1.87 km/s | |
| Details[6] | ||
| Supergiant | ||
| Mass | 24±4 M☉ | |
| Radius | 27+9 −7 R☉ | |
| Luminosity | 1.8+1.0 −0.7×105 L☉ | |
| Temperature | 23,000±2,000 K | |
| Companion | ||
| Mass | 7.2 M☉ | |
| Database references | ||
| SIMBAD | data | |
GG Carinae is a
This star was found to have a peculiar
eclipsing binary and intrinsically variable.[11] This period was confirmed by D. Hoffleit in 1933.[9] A near infrared excess was detected in 1973, indicating a circumstellar dust shell.[12]
Analysis of the spectrum by
supergiant B[e] star by Henny Lamers and associates in 1998, based on properties similar to B[e] supergiants in the Magellanic Clouds.[14]
In 2004,
periastron.[6]
GG Carinae is almost certainly a member of the rich but faint open cluster ASCC 63, which is thought to have about 1,700 member stars. The cluster is calculated to be 18 million years old and 3,500 pc away.[18]
References
- ^ Bibcode:1984A&AS...55..411G. Note: the bibcode page for this paper shows the wrong title.
- ^ .
- ^ S2CID 119257644.
- ^ S2CID 125853869.
- Bibcode:1992A&A...261..482L.
- ^ .
- ^ "GG Car". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-08-15.
- Bibcode:1892AstAp..11..765F. Listed as AGC 14965.
- ^ Bibcode:1933BHarO.892...19H.
- doi:10.1086/143490.
- Bibcode:1930BAN.....6...11K.
- .
- doi:10.1086/130920.
- Bibcode:1998A&A...340..117L.
- Bibcode:2004RMxAC..20..239M.
- S2CID 17577491.
- ^ S2CID 59034700, A28.
- .
Further reading
- Porter, Augustus; et al. (January 2022), "The circumbinary rings of GG Carinae: indications of disc eccentricity growth in the B[e] supergiant's atomic emission lines", Monthly Notices of the Royal Astronomical Society, 509 (2): 1720–1735, .
- Porter, Augustus; et al. (June 2021), "GG Carinae: discovery of orbital-phase-dependent 1.583-day periodicities in the B[e] supergiant binary", Monthly Notices of the Royal Astronomical Society, 503 (4): 4802–4814, .
- Domiciano de Souza, A.; et al. (January 2015), "The circumstellar environment of the B[e] star GG Car: an interferometric modeling", New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry, Proceedings of the International Astronomical Union, IAU Symposium, vol. 307, pp. 291–292, .
- Marchiano, P.; et al. (April 2012), "The spectroscopic orbits and physical parameters of GG Carinae", Astronomy & Astrophysics, 540: 9, , A91.
- Pereyra, Antonio; et al. (July 2011), "Hα spectropolarimetry of GG Car", Active OB stars: structure, evolution, mass loss, and critical limits, Proceedings of the International Astronomical Union, IAU Symposium, vol. 272, pp. 420–421, .
- Marchiano, Paula E.; et al. (July 2011), "The spectroscopic orbits and physical parameters of GG Car", Active OB stars: structure, evolution, mass loss, and critical limits, Proceedings of the International Astronomical Union, IAU Symposium, vol. 272, pp. 523–524, .
- Pereyra, A.; et al. (December 2009), "Hα spectropolarimetry of the B[e] supergiant GG Carinae", Astronomy and Astrophysics, 508 (3): 1337–1341, S2CID 54751014.
- Gosset, E.; et al. (December 1985), "Radial velocities along the light curve of the peculiar emission-line star GG Carinae.", Astronomy and Astrophysics, 153: 71–78, Bibcode:1985A&A...153...71G.
- Chen, K. -Y.; et al. (February 1983), "Photoelectric photometry of GG Carinae", Publications of the Astronomical Society of the Pacific, 95: 157–162, doi:10.1086/131138.
- Swings, J. P. (1974), "Similarities in the spectra of three southern peculiar emission line stars with infrared excesses: HD 45677, HD 87643 and GG Carinae (HD 94878)", Astronomy and Astrophysics, 34: 333–334, Bibcode:1974A&A....34..333S.
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| Star clusters |
| ||||||||||
| Nebulae |
| ||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||
