Collinder 228 is an open cluster within the southern part of the Carina Nebula NGC 3372, about 25' south of η Carinae.[2] It is probably composed of stars which recently formed from the material in the nebula. QZ Carinae is the brightest member of Collinder 228 with an apparent magnitude between 6.16–6.49 .[3]
| Collinder 228 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Right ascension | 10h 44m 00.0s[1] |
| Declination | −60° 05′ 12″[1] |
| Distance | 10,000 ly |
| Apparent magnitude (V) | 4.4[1] |
| Apparent dimensions (V) | 14 |
| Physical characteristics | |
| Other designations | OCl 828.0, MWSC 1845, C 1041-597, KPR2004b 262[1] |
| Associations | |
| Constellation | Carina |
| Star name |
FMF number |
Effective temperature |
Absolute magnitude |
Bolometric magnitude |
Mass (M☉) |
Spectral type |
Ref. |
|---|---|---|---|---|---|---|---|
| WR 24 (HD 93131) |
3 | 50100 | −7.34 | −11.4 | 114 | WN6ha-w | [4] |
| QZ Car (HD 93206) |
33 | 30400 + 20000 + 34000 + 32900 |
−9.2 + 3 + 8.5 + 7 |
−10.6 | 27.1 + 6.5 + 25.4 + 17.1 |
O9.7I + B2V + O8III + O9V |
[5][6][7] |
| HD 93632 | 92 | 45400 | −6.1 | −10.2 | 76 | O5III(f) | [7] |
| V661 Car (HD 93130) |
1 | 39900 | −6.3 | −10.1 | 68 | O7II(f) | [7] |
| HD 305525 | 98 | 43600 | −5.7 | −9.8 | 58 | O6V | [7] |
| 97 | 46100 | −4.8 | −9 | 47 | O5V | [7] | |
| HD 93146 | 42400 | −5.1 | −9.1 | 44 | O6.5V((f)) | [7] | |
| HD 305524 | 7 | 41000 | −5.2 | −9.1 | 42 | O7V((f)) | [7] |
| HD 93222 | 6 | 37200 | −5.7 | −9.3 | 42 | O8III((f)) | [7] |
| HD 305523 | 32 | 35700 | −5.6 | −9.1 | 38 | O8.5III | [7] |
| HD 305532 | 38 | 43600 | −4.4 | −8.5 | 38 | O6V((f)) | [7] |
| HD 305438 | 24 | 38500 | −4.6 | −8.4 | 32 | O8V | [7] |
| HD 93028 | 27 | 35700 | −4.9 | −8.4 | 30 | O8.5III | [7] |
| HD 305518 | 22 | 34700 | −5 | −8.3 | 29 | O9.5V | [7] |
| HD 93027 | 14 | 36000 | −4.8 | −8.3 | 29 | O9V | [7] |
| 39 | 37200 | −4.6 | −8.2 | 29 | O8.5V((f)) | [7] | |
| HD 305539 | 94 | 37200 | −4.4 | −8.1 | 28 | O8.5V | [7] |
| 67 | 36000 | −4.7 | −8.2 | 28 | O9V | [7] | |
| HD 93576 | 93 | 36000 | −4.7 | −8.2 | 28 | O9V | [7] |
| 21 | 37200 | −4.2 | −7.8 | 27 | O8.5V | [7] | |
| HD 305536 | 5 | 34700 | −4.7 | −8.1 | 26 | O9.5V | [7] |
| 66 | 34700 | −3.9 | −7.3 | 22 | O9.5V | [7] | |
| 12 | 20900 | −6.1 | −8 | 20 | B2.5Ia: | [7] |
See also
editReferences
edit- ^ a b c d "Collinder 228". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 December 2020.
- ^ Feinstein, A. (1995). "Open clusters in the Carina Nebula". Revista Mexicana de Astronomía y Astrofísica. Serie de Conferencias. 2: 57. Bibcode:1995RMxAC...2...57F.
- ^ Samus, N.N.; Durlevich, O.V.; et al. (2009). General Catalogue of Variable Stars (Samus+ 2007–2013) (Report). VizieR On-line Data Catalog. Vol. 1. p. 02025. Bibcode:2009yCat....102025S. doi:10.1134/S1063772917010085. B/GCVS.
Originally published in Astronomy Reports (January 2017) DOI 10.1134/S1063772917010085
- ^ Sota, A.; Maíz Apellániz, J.; Morrell, N.I.; Barbá, R.H.; Walborn, N.R.; Gamen, R.C.; Arias, J.I.; Alfaro, E.J.; Oskinova, L.M. (2019). "The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters". Astronomy & Astrophysics. A57: 625. arXiv:1904.04687. Bibcode:2019A&A...625A..57H. doi:10.1051/0004-6361/201834850. S2CID 104292503.
- ^ Rainot, A.; Reggiani, M.; Sana, H.; Bodensteiner, J.; Gomez-Gonzalez, C.A.; Absil, O.; et al. (2020). "Carina High-contrast Imaging Project for Massive Stars (CHIPS). I. Methodology and proof of concept on QZ Car (≡ HD 93206)". Astronomy and Astrophysics. 640: A15. arXiv:2006.01914. Bibcode:2020A&A...640A..15R. doi:10.1051/0004-6361/201936448. S2CID 219260368.
- ^ Parkin, E.R.; Broos, P.S.; Townsley, L.K.; Pittard, J.M.; Moffat, A.F.J.; Nazé, Y.; et al. (2011). "X-ray emission from the double-binary OB-star system QZ Car (HD 93206)". The Astrophysical Journal Supplement. 194 (1). article 8. arXiv:1103.0794. Bibcode:2011ApJS..194....8P. doi:10.1088/0067-0049/194/1/8. S2CID 119292907.
- ^ a b c d e f g h i j k l m n o p q r s t u v Massey, P.; de Gioia-Eastwood, K.; Waterhouse, E. (2001). "The progenitor masses of Wolf-Rayet stars and luminous blue variables determined from cluster turnoffs. II. Results from 12 Galactic clusters and OB associations". The Astronomical Journal. 121 (2): 1050–1070. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769. S2CID 53345173.