NGC 6383
| NGC 6383 | |
|---|---|
 | |
| Observation data | |
| Right ascension | 17h 34m 41.5s[1] |
| Declination | −32° 34′ 23″[1] |
| Distance | 3,540 ± 340 ly (1,086 ± 104 pc)[2] |
| Apparent dimensions (V) | 20′[3] |
| Physical characteristics | |
| Estimated age | 12.1+4.2 −3.1 Myr[2] |
| Other designations | NGC 6383, Cl VDBH 232[4] |
| Associations | |
| Constellation | Scorpius |
NGC 6383 is an open cluster of stars in the constellation of Scorpius. It was discovered by English astronomer John Herschel in 1847. In the New General Catalogue it was also identified as NGC 6374, most likely due to a clerical error.[5] This is a large cluster of scattered stars that spans an angular diameter of 20′. The brightest component is the O-type binary star system designated HD 159176 (HR 4962). Against the glare of this sixth magnitude star, a handful of fainter members are visible with a pair of large binoculars.[3]
The cluster NGC 6383 is located at a distance of approximately 3,540 light-years (1,086 pc) from the Sun.[2] It forms part of the Milky Way galaxy's Carina–Sagittarius Arm in a star forming region identified as Sh 2-012,[6] and lies in front of a dust absorption cloud. The cluster is likely part of the Sagittarius OB1 association, as are the clusters NGC 6530 and NGC 6531. This cluster, and in particular the ionizing radiation from the star HD 159176, form the H II region RCW 132, which span a crescent-shaped volume that has an angular size of 110′ × 80′.[5]
This is a young cluster with age estimates ranging from 4 to 20 million years, and has not yet achieved dynamic relaxation. It has a 254 members identified, with 53 forming young stellar objects,[6] and 21 being hot, massive OB stars. 76 secondary X-ray sources have been detected, with most of them concentrated near the core.[5] Newly-formed stars range in age from 1–6 million years old, indicating recent star formation activity. The cluster has a compact core radius of 1.94′±0.19′ and a tidal radius of 40.7′±14.4′.[6]
References[edit]
- ^ a b Tarricq, Y.; et al. (March 2021), "3D kinematics and age distribution of the open cluster population", Astronomy & Astrophysics, 647, id. A19, arXiv:2012.04017, Bibcode:2021A&A...647A..19T, doi:10.1051/0004-6361/202039388.
- ^ a b c Dias, W. S.; et al. (June 2021), "Updated parameters of 1743 open clusters based on Gaia DR2", Monthly Notices of the Royal Astronomical Society, 504 (1): 356–371, arXiv:2103.12829, Bibcode:2021MNRAS.504..356D, doi:10.1093/mnras/stab770.
- ^ a b Crossen, Craig; Rhemann, Gerald (2012), Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes, Springer Vienna, pp. 52–53, ISBN 9783709106266.
- ^ "NGC 6383". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-05-26.
- ^ a b c Rauw, G.; De Becker, M. (December 2008), Reipurth, Bo (ed.), "The Multiwavelength Picture of Star Formation in the Very Young Open Cluster NGC 6383", Handbook of Star Forming Regions, volume II, The Southern Sky ASP Monograph Publications, vol. 5, p. 497, arXiv:0808.3887, Bibcode:2008hsf2.book..497R, doi:10.48550/arXiv.0808.3887.
- ^ a b c Pulgar-Escobar, L. M.; et al. (May 2024), Characterizing NGC 6383: A study of pre-main sequence stars, mass segregation, and age using Gaia DR3 and 2MASS, arXiv:2405.09145, Bibcode:2024arXiv240509145P, doi:10.48550/arXiv.2405.09145.
Further reading[edit]
- Kalari, V. M. (April 2019), "Classical T-Tauri stars with VPHAS+: II: NGC 6383 in Sh 2-012", Monthly Notices of the Royal Astronomical Society, 484 (4): 5102–5112, arXiv:1901.07511, Bibcode:2019MNRAS.484.5102K, doi:10.1093/mnras/stz250.
- Aidelman, Y.; et al. (February 2018), "Open clusters. III. Fundamental parameters of B stars in NGC 6087, NGC 6250, NGC 6383, and NGC 6530 B-type stars with circumstellar envelopes", Astronomy & Astrophysics, 610, id. A30, arXiv:1711.01311, Bibcode:2018A&A...610A..30A, doi:10.1051/0004-6361/201730995.
- Bakich, Michael E. (June 26, 2014), "Open cluster NGC 6383, globular cluster NGC 6229, and the Cheerio Nebula", Astronomy, Kalmbach Media, retrieved 2024-05-26.
- Rauw, G.; et al. (February 2010), "A photometric and spectroscopic investigation of star formation in the very young open cluster NGC 6383", Astronomy and Astrophysics, 511, id. A25, arXiv:1001.0696, Bibcode:2010A&A...511A..25R, doi:10.1051/0004-6361/200912780.
- Paunzen, E.; et al. (January 2007), "Investigating star formation in the young open cluster NGC 6383", Astronomy and Astrophysics, 462 (1): 157–162, arXiv:astro-ph/0611304, Bibcode:2007A&A...462..157P, doi:10.1051/0004-6361:20065513.
- Qian, S. -B.; et al. (November 2006), "Orbital period investigations of two short-period early-type overcontact binaries BH Cen and V701 Sco in two extremely young galactic clusters IC 2944 and NGC 6383", New Astronomy, 12 (2): 117–123, Bibcode:2006NewA...12..117Q, doi:10.1016/j.newast.2006.07.003.
- Zwintz, K.; et al. (February 2005), "Search for pulsating pre-main-sequence stars in NGC6383", Monthly Notices of the Royal Astronomical Society, 357 (1): 345–353, arXiv:astro-ph/0501210, Bibcode:2005MNRAS.357..345Z, doi:10.1111/j.1365-2966.2005.08655.x.
- Rauw, G.; et al. (September 2003), "An XMM-Newton observation of the very young open cluster NGC 6383", Astronomy and Astrophysics, 407: 925–934, Bibcode:2003A&A...407..925R, doi:10.1051/0004-6361:20030910.
- van den Ancker, M. E.; et al. (October 2000), "The central part of the young open cluster NGC 6383", Astronomy and Astrophysics, 362: 580–584, arXiv:astro-ph/0006283, Bibcode:2000A&A...362..580V, doi:10.48550/arXiv.astro-ph/0006283.
- Fitzgerald, M. P.; et al. (March 1978), "NGC 6383 - I. The central core", Monthly Notices of the Royal Astronomical Society, 182: 607, Bibcode:1978MNRAS.182..607F, doi:10.1093/mnras/182.4.607.
- Lloyd Evans, T. (September 1978), "The open cluster NGC 6383", Monthly Notices of the Royal Astronomical Society, 184: 661–676, Bibcode:1978MNRAS.184..661L, doi:10.1093/mnras/184.4.661.
