NGC 2547

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 ascension	8h 09m 52.360s
Declination	−49° 10′ 35.01″
Distance	1.19 kly (364.0+46.8; −37.9 pc)
Apparent magnitude (V)	4.7
Apparent dimensions (V)	20′
Physical characteristics
Mass	201 M☉
Radius	2.61 ly
Estimated age	37.7+5.7; −4.8 Myr
Other designations	NGC 2547, Cr 177, Mel 84, Dunlop 410, Lacaille III.2
Associations
Constellation	Vela
	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] from South Africa. The star cluster is young with an age of 20-30 million years.^[3]

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.^[4]

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.^[5]^[6] 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.^[7]

NGC 2547 shows evidence for mass segregation down to 3 M_☉.^[8]

^ ^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.
^ "Full name of NGC discoverers". NASA/IPAC Extragalactic Database. Archived from the original on 28 February 2011. Retrieved 5 September 2014.
^ "Young, Hot and Blue - Stars in the cluster NGC 2547". www.eso.org. Retrieved 2020-01-22.
^ 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.
^ 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.
^ "[BBJ2018] 6". sim-basic. Retrieved 2020-01-22.
^ 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.
^ 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.

[Bravi_et_al-1] 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.

[Discoverers-2] "Full name of NGC discoverers". NASA/IPAC Extragalactic Database. Archived from the original on 28 February 2011. Retrieved 5 September 2014.

[3] "Young, Hot and Blue - Stars in the cluster NGC 2547". www.eso.org. Retrieved 2020-01-22.

[4] 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.

[5] 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.

[6] "[BBJ2018] 6". sim-basic. Retrieved 2020-01-22.

[7] 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.

[8] 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.

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