NGC 2547

NGC 2547
This image from the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESO's La Silla Observatory in Chile, shows the bright open star cluster NGC 2547.
Observation data (J2000.0 epoch)
Right ascension8h 09m 52.360s
Declination−49° 10′ 35.01″
Distance1.19 kly (364.0+46.8
−37.9[1] pc)
Apparent magnitude (V)4.7
Apparent dimensions (V)20′
Physical characteristics
Mass201[1] M☉
Radius2.61[1] ly
Estimated age37.7+5.7
−4.8[1] Myr
Other designationsNGC 2547, Cr 177, Mel 84, Dunlop 410, Lacaille III.2
Associations
ConstellationVela
See also: Open cluster, List of open clusters

NGC 2547 is a southern open cluster in Vela, discovered by Nicolas Louis de Lacaille in 1751[2][3] from South Africa. The star cluster is young with an age of 20-30 million years.[4]

Observations with the Spitzer Space Telescope showed a shell around the B3 III/IV-type star HD 68478. This could be a sign of recent mass loss in this star.[5]

A study using Gaia DR2 data showed that NGC 2547 formed about 30 million years ago together with a new discovered star cluster, called [BBJ2018] 6.[6][7] The star cluster NGC 2547 has a similar age compared with Trumpler 10, NGC 2451B, Collinder 135 and Collinder 140. It was suggested that all these clusters formed in a single event of triggered star formation.[8]

NGC 2547 shows evidence for mass segregation down to 3 M☉.[9]

  1. ^ a b c d Bravi, L.; Zari, E.; Sacco, G. G.; Randich, S.; Jeffries, R. D.; Jackson, R. J.; Franciosini, E.; Moraux, E.; López-Santiago, J.; Pancino, E.; Spina, L. (July 2018). "The Gaia-ESO Survey: a kinematical and dynamical study of four young open clusters". Astronomy & Astrophysics. 615: A37. arXiv:1803.01908. Bibcode:2018A&A...615A..37B. doi:10.1051/0004-6361/201832645. ISSN 0004-6361. S2CID 119494247.
  2. ^ "Full name of NGC discoverers". NASA/IPAC Extragalactic Database. Archived from the original on 28 February 2011. Retrieved 5 September 2014.
  3. ^ Jones, K. G. (March 1969). "The search for the nebulae - VI". Journal of the British Astronomical Association. 79: 213–222. Bibcode:1969JBAA...79..213J.
  4. ^ "Young, Hot and Blue - Stars in the cluster NGC 2547". www.eso.org. Retrieved 2020-01-22.
  5. ^ Young, E. T.; Lada, C. J.; Teixeira, P.; Muzerolle, J.; Muench, A.; Stauffer, J.; Beichman, C. A.; Rieke, G. H.; Hines, D. C.; Su, K. Y. L.; Engelbracht, C. W. (September 2004). "Spitzer Observations of NGC 2547: The Disk Population at 25 Million Years". The Astrophysical Journal Supplement Series. 154 (1): 428. Bibcode:2004ApJS..154..428Y. doi:10.1086/422688. ISSN 0067-0049.
  6. ^ Beccari, Giacomo; Boffin, Henri M. J.; Jerabkova, Tereza; Wright, Nicholas J.; Kalari, Venu M.; Carraro, Giovanni; De Marchi, Guido; de Wit, Willem-Jan (November 2018). "A sextet of clusters in the Vela OB2 region revealed by Gaia" (PDF). MNRAS. 481 (1): L11–L15. arXiv:1807.07073. Bibcode:2018MNRAS.481L..11B. doi:10.1093/mnrasl/sly144. ISSN 0035-8711. S2CID 118974910.
  7. ^ "[BBJ2018] 6". sim-basic. Retrieved 2020-01-22.
  8. ^ Cantat-Gaudin, T.; Mapelli, M.; Balaguer-Núñez, L.; Jordi, C.; Sacco, G.; Vallenari, A. (January 2019). "A ring in a shell: the large-scale 6D structure of the Vela OB2 complex". Astronomy & Astrophysics. 621: A115. arXiv:1808.00573. Bibcode:2019A&A...621A.115C. doi:10.1051/0004-6361/201834003. ISSN 0004-6361. S2CID 119071750.
  9. ^ Littlefair, S. P.; Naylor, Tim; Jeffries, R. D.; Devey, C. R.; Vine, S. (November 2003). "Mass segregation in the young open cluster NGC 2547". MNRAS. 345 (4): 1205–1211. arXiv:astro-ph/0308320. Bibcode:2003MNRAS.345.1205L. doi:10.1046/j.1365-2966.2003.07035.x. ISSN 0035-8711.